spring boot人员管理系统基本结构

1.使用缓存减轻数据库的压力， 承受高的并发量

2.验证码三分钟有效， 把这些临时的数据放在缓存中

JSR-107

为了规定缓存的规范 ，javaee发布的jsr-107

Java Caching定义了5个核心接口，分别是CachingProvider, CacheManager, Cache, Entry和Expiry。
•CachingProvider（缓存提供者）： 定义了创建、配置、获取、管理和控制多个CacheManager。一个应用可以在运行期访问多个CachingProvider。
•CacheManager  ：定义了创建、配置、获取、管理和控制多个唯一命名的Cache，这些Cache存在于CacheManager的上下文中。一个CacheManager  ：仅被一个CachingProvider所拥有。
•Cache                 ：是一个类似Map的数据结构并临时存储以Key为索引的值。一个Cache仅被一个CacheManager所拥有。
•Entry                    ：是一个存储在Cache中的key-value对。
•Expiry                ：每一个存储在Cache中的条目有一个定义的有效期。一旦超过这个时间，条目为过期的状态。一旦过期，条目将不可访问、更新和删除。缓存有效期可以通过ExpiryPolicy设置。

用户使用缓存，可以通过cacheprovider 获取到cachemanager 

整个交互应该是这样的

spring 的缓存抽象

使用jsr107 开发难度还是挺大的，spring从3.1开始定义了Spring从3.1开始定义了org.springframework.cache.Cache和org.springframework.cache.CacheManager接口来统一不同的缓存技术；并支持使用JCache（JSR-107）注解简化我们开发；

•Cache接口为缓存的组件规范定义，包含缓存的各种操作集合；

•Cache接口下Spring提供了各种xxxCache的实现；如RedisCache，EhCacheCache , ConcurrentMapCache等；

•每次调用需要缓存功能的方法时，Spring会检查检查指定参数的指定的目标方法是否已经被调用过；如果有就直接从缓存中获取方法调用后的结果，如果没有就调用方法并缓存结果后返回给用户。下次调用直接从缓存中获取。

•使用Spring缓存抽象时我们需要关注以下两点；

1、确定方法需要被缓存以及他们的缓存策略

2、从缓存中读取之前缓存存储的数据

Cache	缓存接口，定义缓存操作。实现有：RedisCache、EhCacheCache、ConcurrentMapCache等
CacheManager	缓存管理器，管理各种缓存（Cache）组件
@Cacheable	主要针对方法配置，能够根据方法的请求参数对其结果进行缓存 （get）
@CacheEvict	清空缓存  （delete）
@CachePut	保证方法被调用，又希望结果被缓存。（update）
@EnableCaching	开启基于注解的缓存
keyGenerator	缓存数据时key生成策略

HelloWorld

我们写一个正常的没有缓存的程序， 也就是说每次请求查询一次数据库 

Mapper

package com.zzq.springboot01cache.mapper;

import com.zzq.springboot01cache.entity.Employee;
import org.apache.ibatis.annotations.*;

@Mapper
public interface EmployeeMapper {

    @Select("SELECT * FROM employee WHERE id = #{id}")
    public Employee getEmpById(Integer id);

    @Update("UPDATE employee SET lastName=#{lastName},email=#{email},gender=#{gender},d_id=#{dId} WHERE id=#{id}")
    public void updateEmp(Employee employee);

    @Delete("DELETE FROM employee WHERE id=#{id}")
    public void deleteEmpById(Integer id);

    @Insert("INSERT INTO employee(lastName,email,gender,d_id) VALUES(#{lastName},#{email},#{gender},#{dId})")
    public void insertEmployee(Employee employee);

    @Select("SELECT * FROM employee WHERE lastName = #{lastName}")
    Employee getEmpByLastName(String lastName);
}

Service

public Employee getEmployeeById(Integer id){
        System.out.println("查询员工"+id);
        return  employeeMapper.getEmpById(id);
    }

Controller

@GetMapping("/emp/{id}")
    public Employee getEmpById(@PathVariable("id") Integer id){
        return  employeeService.getEmployeeById(id);
    }

这样的话我们每次请求都会查询一次数据库，在service 中写的打印语句也就会被打印，下面我们使用缓存

1.在springbootapplication启动类上加上开启缓存的注解

    @EnableCaching

@EnableCaching
@MapperScan(basePackages = {"com.zzq.springboot01cache.mapper"})
@SpringBootApplication
public class Springboot01CacheApplication {

	public static void main(String[] args) {
		SpringApplication.run(Springboot01CacheApplication.class, args);
	}
}

2.在我们需要缓存的方法上加上对应的注解， 具体加什么注解， 看上面的截图

@Cacheable(cacheNames = "emp")
    public Employee getEmployeeById(Integer id){
        System.out.println("查询员工"+id);
        return  employeeMapper.getEmpById(id);
    }

这个时候就会发现，只会打印输出语句一次，

一个springboot 的缓存简单的缓存机制就完成了

springboot 缓存原理

凡是springboot 的东西我们就看自动配置，xxxautoconfigruaction  

CacheAutoConfiguration

上面标注了这么多东西

@Configuration
@ConditionalOnClass(CacheManager.class)
@ConditionalOnBean(CacheAspectSupport.class)
@ConditionalOnMissingBean(value = CacheManager.class, name = "cacheResolver")
@EnableConfigurationProperties(CacheProperties.class)
@AutoConfigureBefore(HibernateJpaAutoConfiguration.class)
@AutoConfigureAfter({ CouchbaseAutoConfiguration.class, HazelcastAutoConfiguration.class,
		RedisAutoConfiguration.class })
@Import(CacheConfigurationImportSelector.class)

@configuration  标注配置类

@ConditionalOnClass  当容器中有CacheManager 的时候

@ConditionalOnBean  当容器中有CacheAspectSupport这个组件的时候

@ConditionalOnMissingBean 容器中没有名字是cacheResolver 的CacheManager 这个类型的类的时候

@EnacbleConfigurationProperties  自动装配注解， 

@autoConfigureBefore  在这个类开始只配置之前发生的配置类

@autoConfigureAfter 在这个类配置之后发生的事情

@Import 导入CacheConfigurationImportSlector 这个类

CacheConfigurationImportSlector

*/
	static class CacheConfigurationImportSelector implements ImportSelector {

		@Override
		public String[] selectImports(AnnotationMetadata importingClassMetadata) {
			CacheType[] types = CacheType.values();
			String[] imports = new String[types.length];
			for (int i = 0; i < types.length; i++) {
				imports[i] = CacheConfigurations.getConfigurationClass(types[i]);
			}
			return imports;
		}

	}

看源码这是一个内部类最终返回了所有的导入的组件 我们debug 看下

org.springframework.boot.autoconfigure.cache.GenericCacheConfiguration
org.springframework.boot.autoconfigure.cache.JCacheCacheConfiguration
org.springframework.boot.autoconfigure.cache.EhCacheCacheConfiguration
org.springframework.boot.autoconfigure.cache.HazelcastCacheConfiguration
org.springframework.boot.autoconfigure.cache.InfinispanCacheConfiguration
org.springframework.boot.autoconfigure.cache.CouchbaseCacheConfiguration
org.springframework.boot.autoconfigure.cache.RedisCacheConfiguration
org.springframework.boot.autoconfigure.cache.CaffeineCacheConfiguration
org.springframework.boot.autoconfigure.cache.SimpleCacheConfiguration
org.springframework.boot.autoconfigure.cache.NoOpCacheConfiguration

导入了10个CacheConfiguration 导入10 中缓存的配置，说明springboot 会自动的配置这10 中缓存

下面我们就看下他默认使用的是什么缓存

吧springboot 调成debug 模式，这样就可以显示在启动的时候自动配置类的情况

我们看日志

============================
CONDITIONS EVALUATION REPORT
============================

积极的匹配
Positive matches:
-----------------

   CacheAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.cache.CacheManager'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - @ConditionalOnBean (types: org.springframework.cache.interceptor.CacheAspectSupport; SearchStrategy: all) found bean 'cacheInterceptor'; @ConditionalOnMissingBean (names: cacheResolver; types: org.springframework.cache.CacheManager; SearchStrategy: all) did not find any beans (OnBeanCondition)

   CacheAutoConfiguration#cacheManagerCustomizers matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.autoconfigure.cache.CacheManagerCustomizers; SearchStrategy: all) did not find any beans (OnBeanCondition)

   CodecsAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.http.codec.CodecConfigurer'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   CodecsAutoConfiguration.JacksonCodecConfiguration matched:
      - @ConditionalOnClass found required class 'com.fasterxml.jackson.databind.ObjectMapper'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   CodecsAutoConfiguration.JacksonCodecConfiguration#jacksonCodecCustomizer matched:
      - @ConditionalOnBean (types: com.fasterxml.jackson.databind.ObjectMapper; SearchStrategy: all) found bean 'jacksonObjectMapper' (OnBeanCondition)

   DataSourceAutoConfiguration matched:
      - @ConditionalOnClass found required classes 'javax.sql.DataSource', 'org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   DataSourceAutoConfiguration.PooledDataSourceConfiguration matched:
      - AnyNestedCondition 1 matched 1 did not; NestedCondition on DataSourceAutoConfiguration.PooledDataSourceCondition.PooledDataSourceAvailable PooledDataSource found supported DataSource; NestedCondition on DataSourceAutoConfiguration.PooledDataSourceCondition.ExplicitType @ConditionalOnProperty (spring.datasource.type) did not find property 'type' (DataSourceAutoConfiguration.PooledDataSourceCondition)
      - @ConditionalOnMissingBean (types: javax.sql.DataSource,javax.sql.XADataSource; SearchStrategy: all) did not find any beans (OnBeanCondition)

   DataSourceConfiguration.Hikari matched:
      - @ConditionalOnClass found required class 'com.zaxxer.hikari.HikariDataSource'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - @ConditionalOnProperty (spring.datasource.type=com.zaxxer.hikari.HikariDataSource) matched (OnPropertyCondition)
      - @ConditionalOnMissingBean (types: javax.sql.DataSource; SearchStrategy: all) did not find any beans (OnBeanCondition)

   DataSourceJmxConfiguration matched:
      - @ConditionalOnProperty (spring.jmx.enabled=true) matched (OnPropertyCondition)

   DataSourceJmxConfiguration.Hikari matched:
      - @ConditionalOnClass found required class 'com.zaxxer.hikari.HikariDataSource'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - @ConditionalOnSingleCandidate (types: javax.sql.DataSource; SearchStrategy: all) found a primary bean from beans 'dataSource' (OnBeanCondition)

   DataSourcePoolMetadataProvidersConfiguration.HikariPoolDataSourceMetadataProviderConfiguration matched:
      - @ConditionalOnClass found required class 'com.zaxxer.hikari.HikariDataSource'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   DataSourceTransactionManagerAutoConfiguration matched:
      - @ConditionalOnClass found required classes 'org.springframework.jdbc.core.JdbcTemplate', 'org.springframework.transaction.PlatformTransactionManager'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   DataSourceTransactionManagerAutoConfiguration.DataSourceTransactionManagerConfiguration matched:
      - @ConditionalOnSingleCandidate (types: javax.sql.DataSource; SearchStrategy: all) found a primary bean from beans 'dataSource' (OnBeanCondition)

   DataSourceTransactionManagerAutoConfiguration.DataSourceTransactionManagerConfiguration#transactionManager matched:
      - @ConditionalOnMissingBean (types: org.springframework.transaction.PlatformTransactionManager; SearchStrategy: all) did not find any beans (OnBeanCondition)

   DevToolsDataSourceAutoConfiguration matched:
      - DevTools DataSource Condition found auto-configured DataSource (DevToolsDataSourceAutoConfiguration.DevToolsDataSourceCondition)

   DispatcherServletAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.web.servlet.DispatcherServlet'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - found ConfigurableWebEnvironment (OnWebApplicationCondition)

   DispatcherServletAutoConfiguration.DispatcherServletConfiguration matched:
      - @ConditionalOnClass found required class 'javax.servlet.ServletRegistration'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - Default DispatcherServlet did not find dispatcher servlet beans (DispatcherServletAutoConfiguration.DefaultDispatcherServletCondition)

   DispatcherServletAutoConfiguration.DispatcherServletRegistrationConfiguration matched:
      - @ConditionalOnClass found required class 'javax.servlet.ServletRegistration'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - DispatcherServlet Registration did not find servlet registration bean (DispatcherServletAutoConfiguration.DispatcherServletRegistrationCondition)

   DispatcherServletAutoConfiguration.DispatcherServletRegistrationConfiguration#dispatcherServletRegistration matched:
      - @ConditionalOnBean (names: dispatcherServlet; types: org.springframework.web.servlet.DispatcherServlet; SearchStrategy: all) found bean 'dispatcherServlet' (OnBeanCondition)

   EmbeddedWebServerFactoryCustomizerAutoConfiguration.TomcatWebServerFactoryCustomizerConfiguration matched:
      - @ConditionalOnClass found required classes 'org.apache.catalina.startup.Tomcat', 'org.apache.coyote.UpgradeProtocol'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   ErrorMvcAutoConfiguration matched:
      - @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'org.springframework.web.servlet.DispatcherServlet'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - found ConfigurableWebEnvironment (OnWebApplicationCondition)

   ErrorMvcAutoConfiguration#basicErrorController matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.web.servlet.error.ErrorController; SearchStrategy: current) did not find any beans (OnBeanCondition)

   ErrorMvcAutoConfiguration#errorAttributes matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.web.servlet.error.ErrorAttributes; SearchStrategy: current) did not find any beans (OnBeanCondition)

   ErrorMvcAutoConfiguration.DefaultErrorViewResolverConfiguration#conventionErrorViewResolver matched:
      - @ConditionalOnBean (types: org.springframework.web.servlet.DispatcherServlet; SearchStrategy: all) found bean 'dispatcherServlet'; @ConditionalOnMissingBean (types: org.springframework.boot.autoconfigure.web.servlet.error.DefaultErrorViewResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

   ErrorMvcAutoConfiguration.WhitelabelErrorViewConfiguration matched:
      - @ConditionalOnProperty (server.error.whitelabel.enabled) matched (OnPropertyCondition)
      - ErrorTemplate Missing did not find error template view (ErrorMvcAutoConfiguration.ErrorTemplateMissingCondition)

   ErrorMvcAutoConfiguration.WhitelabelErrorViewConfiguration#beanNameViewResolver matched:
      - @ConditionalOnMissingBean (types: org.springframework.web.servlet.view.BeanNameViewResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

   ErrorMvcAutoConfiguration.WhitelabelErrorViewConfiguration#defaultErrorView matched:
      - @ConditionalOnMissingBean (names: error; SearchStrategy: all) did not find any beans (OnBeanCondition)

   HttpEncodingAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.web.filter.CharacterEncodingFilter'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - found ConfigurableWebEnvironment (OnWebApplicationCondition)
      - @ConditionalOnProperty (spring.http.encoding.enabled) matched (OnPropertyCondition)

   HttpEncodingAutoConfiguration#characterEncodingFilter matched:
      - @ConditionalOnMissingBean (types: org.springframework.web.filter.CharacterEncodingFilter; SearchStrategy: all) did not find any beans (OnBeanCondition)

   HttpMessageConvertersAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.http.converter.HttpMessageConverter'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   HttpMessageConvertersAutoConfiguration#messageConverters matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.autoconfigure.http.HttpMessageConverters; SearchStrategy: all) did not find any beans (OnBeanCondition)

   HttpMessageConvertersAutoConfiguration.StringHttpMessageConverterConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.http.converter.StringHttpMessageConverter'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   HttpMessageConvertersAutoConfiguration.StringHttpMessageConverterConfiguration#stringHttpMessageConverter matched:
      - @ConditionalOnMissingBean (types: org.springframework.http.converter.StringHttpMessageConverter; SearchStrategy: all) did not find any beans (OnBeanCondition)

   JacksonAutoConfiguration matched:
      - @ConditionalOnClass found required class 'com.fasterxml.jackson.databind.ObjectMapper'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   JacksonAutoConfiguration.Jackson2ObjectMapperBuilderCustomizerConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.http.converter.json.Jackson2ObjectMapperBuilder'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   JacksonAutoConfiguration.JacksonObjectMapperBuilderConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.http.converter.json.Jackson2ObjectMapperBuilder'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   JacksonAutoConfiguration.JacksonObjectMapperBuilderConfiguration#jacksonObjectMapperBuilder matched:
      - @ConditionalOnMissingBean (types: org.springframework.http.converter.json.Jackson2ObjectMapperBuilder; SearchStrategy: all) did not find any beans (OnBeanCondition)

   JacksonAutoConfiguration.JacksonObjectMapperConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.http.converter.json.Jackson2ObjectMapperBuilder'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   JacksonAutoConfiguration.JacksonObjectMapperConfiguration#jacksonObjectMapper matched:
      - @ConditionalOnMissingBean (types: com.fasterxml.jackson.databind.ObjectMapper; SearchStrategy: all) did not find any beans (OnBeanCondition)

   JacksonAutoConfiguration.ParameterNamesModuleConfiguration matched:
      - @ConditionalOnClass found required class 'com.fasterxml.jackson.module.paramnames.ParameterNamesModule'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   JacksonAutoConfiguration.ParameterNamesModuleConfiguration#parameterNamesModule matched:
      - @ConditionalOnMissingBean (types: com.fasterxml.jackson.module.paramnames.ParameterNamesModule; SearchStrategy: all) did not find any beans (OnBeanCondition)

   JacksonHttpMessageConvertersConfiguration.MappingJackson2HttpMessageConverterConfiguration matched:
      - @ConditionalOnClass found required class 'com.fasterxml.jackson.databind.ObjectMapper'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - @ConditionalOnProperty (spring.http.converters.preferred-json-mapper=jackson) matched (OnPropertyCondition)
      - @ConditionalOnBean (types: com.fasterxml.jackson.databind.ObjectMapper; SearchStrategy: all) found bean 'jacksonObjectMapper' (OnBeanCondition)

   JacksonHttpMessageConvertersConfiguration.MappingJackson2HttpMessageConverterConfiguration#mappingJackson2HttpMessageConverter matched:
      - @ConditionalOnMissingBean (types: org.springframework.http.converter.json.MappingJackson2HttpMessageConverter; SearchStrategy: all) did not find any beans (OnBeanCondition)

   JdbcTemplateAutoConfiguration matched:
      - @ConditionalOnClass found required classes 'javax.sql.DataSource', 'org.springframework.jdbc.core.JdbcTemplate'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - @ConditionalOnSingleCandidate (types: javax.sql.DataSource; SearchStrategy: all) found a primary bean from beans 'dataSource' (OnBeanCondition)

   JdbcTemplateAutoConfiguration.JdbcTemplateConfiguration#jdbcTemplate matched:
      - @ConditionalOnMissingBean (types: org.springframework.jdbc.core.JdbcOperations; SearchStrategy: all) did not find any beans (OnBeanCondition)

   JdbcTemplateAutoConfiguration.NamedParameterJdbcTemplateConfiguration#namedParameterJdbcTemplate matched:
      - @ConditionalOnSingleCandidate (types: org.springframework.jdbc.core.JdbcTemplate; SearchStrategy: all) found a primary bean from beans 'jdbcTemplate'; @ConditionalOnMissingBean (types: org.springframework.jdbc.core.namedparam.NamedParameterJdbcOperations; SearchStrategy: all) did not find any beans (OnBeanCondition)

   JmxAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.jmx.export.MBeanExporter'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - @ConditionalOnProperty (spring.jmx.enabled=true) matched (OnPropertyCondition)

   JmxAutoConfiguration#mbeanExporter matched:
      - @ConditionalOnMissingBean (types: org.springframework.jmx.export.MBeanExporter; SearchStrategy: current) did not find any beans (OnBeanCondition)

   JmxAutoConfiguration#mbeanServer matched:
      - @ConditionalOnMissingBean (types: javax.management.MBeanServer; SearchStrategy: all) did not find any beans (OnBeanCondition)

   JmxAutoConfiguration#objectNamingStrategy matched:
      - @ConditionalOnMissingBean (types: org.springframework.jmx.export.naming.ObjectNamingStrategy; SearchStrategy: current) did not find any beans (OnBeanCondition)

   LocalDevToolsAutoConfiguration matched:
      - Initialized Restarter Condition available and initialized (OnInitializedRestarterCondition)

   LocalDevToolsAutoConfiguration.LiveReloadConfiguration matched:
      - @ConditionalOnProperty (spring.devtools.livereload.enabled) matched (OnPropertyCondition)

   LocalDevToolsAutoConfiguration.LiveReloadConfiguration#liveReloadServer matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.devtools.livereload.LiveReloadServer; SearchStrategy: all) did not find any beans (OnBeanCondition)

   LocalDevToolsAutoConfiguration.RestartConfiguration matched:
      - @ConditionalOnProperty (spring.devtools.restart.enabled) matched (OnPropertyCondition)

   LocalDevToolsAutoConfiguration.RestartConfiguration#classPathFileSystemWatcher matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.devtools.classpath.ClassPathFileSystemWatcher; SearchStrategy: all) did not find any beans (OnBeanCondition)

   LocalDevToolsAutoConfiguration.RestartConfiguration#classPathRestartStrategy matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.devtools.classpath.ClassPathRestartStrategy; SearchStrategy: all) did not find any beans (OnBeanCondition)

   LocalDevToolsAutoConfiguration.RestartConfiguration#conditionEvaluationDeltaLoggingListener matched:
      - @ConditionalOnProperty (spring.devtools.restart.log-condition-evaluation-delta) matched (OnPropertyCondition)

   MultipartAutoConfiguration matched:
      - @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'org.springframework.web.multipart.support.StandardServletMultipartResolver', 'javax.servlet.MultipartConfigElement'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - found ConfigurableWebEnvironment (OnWebApplicationCondition)
      - @ConditionalOnProperty (spring.servlet.multipart.enabled) matched (OnPropertyCondition)

   MultipartAutoConfiguration#multipartConfigElement matched:
      - @ConditionalOnMissingBean (types: javax.servlet.MultipartConfigElement,org.springframework.web.multipart.commons.CommonsMultipartResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

   MultipartAutoConfiguration#multipartResolver matched:
      - @ConditionalOnMissingBean (types: org.springframework.web.multipart.MultipartResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

   MybatisAutoConfiguration matched:
      - @ConditionalOnClass found required classes 'org.apache.ibatis.session.SqlSessionFactory', 'org.mybatis.spring.SqlSessionFactoryBean'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - @ConditionalOnBean (types: javax.sql.DataSource; SearchStrategy: all) found bean 'dataSource' (OnBeanCondition)

   MybatisAutoConfiguration#sqlSessionFactory matched:
      - @ConditionalOnMissingBean (types: org.apache.ibatis.session.SqlSessionFactory; SearchStrategy: all) did not find any beans (OnBeanCondition)

   MybatisAutoConfiguration#sqlSessionTemplate matched:
      - @ConditionalOnMissingBean (types: org.mybatis.spring.SqlSessionTemplate; SearchStrategy: all) did not find any beans (OnBeanCondition)

   PersistenceExceptionTranslationAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   PersistenceExceptionTranslationAutoConfiguration#persistenceExceptionTranslationPostProcessor matched:
      - @ConditionalOnProperty (spring.dao.exceptiontranslation.enabled) matched (OnPropertyCondition)
      - @ConditionalOnMissingBean (types: org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor; SearchStrategy: all) did not find any beans (OnBeanCondition)

   PropertyPlaceholderAutoConfiguration#propertySourcesPlaceholderConfigurer matched:
      - @ConditionalOnMissingBean (types: org.springframework.context.support.PropertySourcesPlaceholderConfigurer; SearchStrategy: current) did not find any beans (OnBeanCondition)

   RestTemplateAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.web.client.RestTemplate'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   RestTemplateAutoConfiguration#restTemplateBuilder matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.web.client.RestTemplateBuilder; SearchStrategy: all) did not find any beans (OnBeanCondition)

   ServletWebServerFactoryAutoConfiguration matched:
      - @ConditionalOnClass found required class 'javax.servlet.ServletRequest'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - found ConfigurableWebEnvironment (OnWebApplicationCondition)

   ServletWebServerFactoryAutoConfiguration#tomcatServletWebServerFactoryCustomizer matched:
      - @ConditionalOnClass found required class 'org.apache.catalina.startup.Tomcat'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   ServletWebServerFactoryConfiguration.EmbeddedTomcat matched:
      - @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'org.apache.catalina.startup.Tomcat', 'org.apache.coyote.UpgradeProtocol'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - @ConditionalOnMissingBean (types: org.springframework.boot.web.servlet.server.ServletWebServerFactory; SearchStrategy: current) did not find any beans (OnBeanCondition)

   SimpleCacheConfiguration matched:
      - Cache org.springframework.boot.autoconfigure.cache.SimpleCacheConfiguration automatic cache type (CacheCondition)
      - @ConditionalOnMissingBean (types: org.springframework.cache.CacheManager; SearchStrategy: all) did not find any beans (OnBeanCondition)

   SpringApplicationAdminJmxAutoConfiguration matched:
      - @ConditionalOnProperty (spring.application.admin.enabled=true) matched (OnPropertyCondition)

   SpringApplicationAdminJmxAutoConfiguration#springApplicationAdminRegistrar matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.admin.SpringApplicationAdminMXBeanRegistrar; SearchStrategy: all) did not find any beans (OnBeanCondition)

   TransactionAutoConfiguration matched:
      - @ConditionalOnClass found required class 'org.springframework.transaction.PlatformTransactionManager'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   TransactionAutoConfiguration#platformTransactionManagerCustomizers matched:
      - @ConditionalOnMissingBean (types: org.springframework.boot.autoconfigure.transaction.TransactionManagerCustomizers; SearchStrategy: all) did not find any beans (OnBeanCondition)

   TransactionAutoConfiguration.EnableTransactionManagementConfiguration matched:
      - @ConditionalOnBean (types: org.springframework.transaction.PlatformTransactionManager; SearchStrategy: all) found bean 'transactionManager'; @ConditionalOnMissingBean (types: org.springframework.transaction.annotation.AbstractTransactionManagementConfiguration; SearchStrategy: all) did not find any beans (OnBeanCondition)

   TransactionAutoConfiguration.EnableTransactionManagementConfiguration.CglibAutoProxyConfiguration matched:
      - @ConditionalOnProperty (spring.aop.proxy-target-class=true) matched (OnPropertyCondition)

   TransactionAutoConfiguration.TransactionTemplateConfiguration matched:
      - @ConditionalOnSingleCandidate (types: org.springframework.transaction.PlatformTransactionManager; SearchStrategy: all) found a primary bean from beans 'transactionManager' (OnBeanCondition)

   TransactionAutoConfiguration.TransactionTemplateConfiguration#transactionTemplate matched:
      - @ConditionalOnMissingBean (types: org.springframework.transaction.support.TransactionTemplate; SearchStrategy: all) did not find any beans (OnBeanCondition)

   ValidationAutoConfiguration matched:
      - @ConditionalOnClass found required class 'javax.validation.executable.ExecutableValidator'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - @ConditionalOnResource found location classpath:META-INF/services/javax.validation.spi.ValidationProvider (OnResourceCondition)

   ValidationAutoConfiguration#defaultValidator matched:
      - @ConditionalOnMissingBean (types: javax.validation.Validator; SearchStrategy: all) did not find any beans (OnBeanCondition)

   ValidationAutoConfiguration#methodValidationPostProcessor matched:
      - @ConditionalOnMissingBean (types: org.springframework.validation.beanvalidation.MethodValidationPostProcessor; SearchStrategy: all) did not find any beans (OnBeanCondition)

   WebMvcAutoConfiguration matched:
      - @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'org.springframework.web.servlet.DispatcherServlet', 'org.springframework.web.servlet.config.annotation.WebMvcConfigurer'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - found ConfigurableWebEnvironment (OnWebApplicationCondition)
      - @ConditionalOnMissingBean (types: org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport; SearchStrategy: all) did not find any beans (OnBeanCondition)

   WebMvcAutoConfiguration#hiddenHttpMethodFilter matched:
      - @ConditionalOnMissingBean (types: org.springframework.web.filter.HiddenHttpMethodFilter; SearchStrategy: all) did not find any beans (OnBeanCondition)

   WebMvcAutoConfiguration#httpPutFormContentFilter matched:
      - @ConditionalOnProperty (spring.mvc.formcontent.putfilter.enabled) matched (OnPropertyCondition)
      - @ConditionalOnMissingBean (types: org.springframework.web.filter.HttpPutFormContentFilter; SearchStrategy: all) did not find any beans (OnBeanCondition)

   WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter#defaultViewResolver matched:
      - @ConditionalOnMissingBean (types: org.springframework.web.servlet.view.InternalResourceViewResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

   WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter#requestContextFilter matched:
      - @ConditionalOnMissingBean (types: org.springframework.web.context.request.RequestContextListener,org.springframework.web.filter.RequestContextFilter; SearchStrategy: all) did not find any beans (OnBeanCondition)

   WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter#viewResolver matched:
      - @ConditionalOnBean (types: org.springframework.web.servlet.ViewResolver; SearchStrategy: all) found beans 'defaultViewResolver', 'beanNameViewResolver', 'mvcViewResolver'; @ConditionalOnMissingBean (names: viewResolver; types: org.springframework.web.servlet.view.ContentNegotiatingViewResolver; SearchStrategy: all) did not find any beans (OnBeanCondition)

   WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter.FaviconConfiguration matched:
      - @ConditionalOnProperty (spring.mvc.favicon.enabled) matched (OnPropertyCondition)

   WebSocketServletAutoConfiguration matched:
      - @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'javax.websocket.server.ServerContainer'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)
      - found ConfigurableWebEnvironment (OnWebApplicationCondition)

   WebSocketServletAutoConfiguration.TomcatWebSocketConfiguration matched:
      - @ConditionalOnClass found required classes 'org.apache.catalina.startup.Tomcat', 'org.apache.tomcat.websocket.server.WsSci'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   WebSocketServletAutoConfiguration.TomcatWebSocketConfiguration#websocketContainerCustomizer matched:
      - @ConditionalOnMissingBean (names: websocketServletWebServerCustomizer; SearchStrategy: all) did not find any beans (OnBeanCondition)

消极的匹配
Negative matches:
-----------------

   ActiveMQAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'javax.jms.ConnectionFactory', 'org.apache.activemq.ActiveMQConnectionFactory' (OnClassCondition)

   AopAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.aspectj.lang.annotation.Aspect', 'org.aspectj.lang.reflect.Advice', 'org.aspectj.weaver.AnnotatedElement' (OnClassCondition)

   ArtemisAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'javax.jms.ConnectionFactory', 'org.apache.activemq.artemis.jms.client.ActiveMQConnectionFactory' (OnClassCondition)

   BatchAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.batch.core.launch.JobLauncher' (OnClassCondition)

   CacheAutoConfiguration.CacheManagerJpaDependencyConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean' (OnClassCondition)

   CaffeineCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.github.benmanes.caffeine.cache.Caffeine' (OnClassCondition)

   CassandraAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.datastax.driver.core.Cluster' (OnClassCondition)

   CassandraDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.datastax.driver.core.Cluster', 'org.springframework.data.cassandra.core.CassandraAdminOperations' (OnClassCondition)

   CassandraReactiveDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.datastax.driver.core.Cluster', 'org.springframework.data.cassandra.core.ReactiveCassandraTemplate', 'reactor.core.publisher.Flux' (OnClassCondition)

   CassandraReactiveRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.data.cassandra.ReactiveSession', 'org.springframework.data.cassandra.repository.ReactiveCassandraRepository' (OnClassCondition)

   CassandraRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.datastax.driver.core.Session', 'org.springframework.data.cassandra.repository.CassandraRepository' (OnClassCondition)

   CloudAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.cloud.config.java.CloudScanConfiguration' (OnClassCondition)

   CouchbaseAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.CouchbaseBucket', 'com.couchbase.client.java.Cluster' (OnClassCondition)

   CouchbaseCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.Bucket', 'com.couchbase.client.spring.cache.CouchbaseCacheManager' (OnClassCondition)

   CouchbaseDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.Bucket', 'org.springframework.data.couchbase.repository.CouchbaseRepository' (OnClassCondition)

   CouchbaseReactiveDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.Bucket', 'org.springframework.data.couchbase.repository.ReactiveCouchbaseRepository', 'reactor.core.publisher.Flux' (OnClassCondition)

   CouchbaseReactiveRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.Bucket', 'org.springframework.data.couchbase.repository.ReactiveCouchbaseRepository', 'reactor.core.publisher.Flux' (OnClassCondition)

   CouchbaseRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.Bucket', 'org.springframework.data.couchbase.repository.CouchbaseRepository' (OnClassCondition)

   DataSourceAutoConfiguration.EmbeddedDatabaseConfiguration:
      Did not match:
         - EmbeddedDataSource found supported pooled data source (DataSourceAutoConfiguration.EmbeddedDatabaseCondition)

   DataSourceConfiguration.Dbcp2:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.apache.commons.dbcp2.BasicDataSource' (OnClassCondition)

   DataSourceConfiguration.Generic:
      Did not match:
         - @ConditionalOnProperty (spring.datasource.type) did not find property 'spring.datasource.type' (OnPropertyCondition)

   DataSourceConfiguration.Tomcat:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.apache.tomcat.jdbc.pool.DataSource' (OnClassCondition)

   DataSourceJmxConfiguration.TomcatDataSourceJmxConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.apache.tomcat.jdbc.pool.DataSourceProxy' (OnClassCondition)

   DataSourcePoolMetadataProvidersConfiguration.CommonsDbcp2PoolDataSourceMetadataProviderConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.apache.commons.dbcp2.BasicDataSource' (OnClassCondition)

   DataSourcePoolMetadataProvidersConfiguration.TomcatDataSourcePoolMetadataProviderConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.apache.tomcat.jdbc.pool.DataSource' (OnClassCondition)

   DevToolsDataSourceAutoConfiguration.DatabaseShutdownExecutorJpaDependencyConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean' (OnClassCondition)

   DispatcherServletAutoConfiguration.DispatcherServletConfiguration#multipartResolver:
      Did not match:
         - @ConditionalOnBean (types: org.springframework.web.multipart.MultipartResolver; SearchStrategy: all) did not find any beans of type org.springframework.web.multipart.MultipartResolver (OnBeanCondition)

   EhCacheCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'net.sf.ehcache.Cache' (OnClassCondition)

   ElasticsearchAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.elasticsearch.client.Client', 'org.springframework.data.elasticsearch.client.TransportClientFactoryBean' (OnClassCondition)

   ElasticsearchDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.elasticsearch.client.Client', 'org.springframework.data.elasticsearch.core.ElasticsearchTemplate' (OnClassCondition)

   ElasticsearchRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.elasticsearch.client.Client', 'org.springframework.data.elasticsearch.repository.ElasticsearchRepository' (OnClassCondition)

   EmbeddedLdapAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.unboundid.ldap.listener.InMemoryDirectoryServer' (OnClassCondition)

   EmbeddedMongoAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.mongodb.MongoClient', 'de.flapdoodle.embed.mongo.MongodStarter' (OnClassCondition)

   EmbeddedWebServerFactoryCustomizerAutoConfiguration.JettyWebServerFactoryCustomizerConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.eclipse.jetty.server.Server', 'org.eclipse.jetty.util.Loader', 'org.eclipse.jetty.webapp.WebAppContext' (OnClassCondition)

   EmbeddedWebServerFactoryCustomizerAutoConfiguration.UndertowWebServerFactoryCustomizerConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'io.undertow.Undertow', 'org.xnio.SslClientAuthMode' (OnClassCondition)

   ErrorWebFluxAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.web.reactive.config.WebFluxConfigurer' (OnClassCondition)

   FlywayAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.flywaydb.core.Flyway' (OnClassCondition)

   FreeMarkerAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'freemarker.template.Configuration' (OnClassCondition)

   GenericCacheConfiguration:
      Did not match:
         - @ConditionalOnBean (types: org.springframework.cache.Cache; SearchStrategy: all) did not find any beans of type org.springframework.cache.Cache (OnBeanCondition)
      Matched:
         - Cache org.springframework.boot.autoconfigure.cache.GenericCacheConfiguration automatic cache type (CacheCondition)

   GroovyTemplateAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'groovy.text.markup.MarkupTemplateEngine' (OnClassCondition)

   GsonAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.google.gson.Gson' (OnClassCondition)

   GsonHttpMessageConvertersConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.google.gson.Gson' (OnClassCondition)

   H2ConsoleAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.h2.server.web.WebServlet' (OnClassCondition)

   HazelcastAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.hazelcast.core.HazelcastInstance' (OnClassCondition)

   HazelcastCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.hazelcast.core.HazelcastInstance', 'com.hazelcast.spring.cache.HazelcastCacheManager' (OnClassCondition)

   HazelcastJpaDependencyAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.hazelcast.core.HazelcastInstance', 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean' (OnClassCondition)

   HibernateJpaAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean', 'javax.persistence.EntityManager' (OnClassCondition)

   HttpHandlerAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.web.reactive.DispatcherHandler' (OnClassCondition)

   HypermediaAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.hateoas.Resource', 'org.springframework.plugin.core.Plugin' (OnClassCondition)

   InfinispanCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.infinispan.spring.provider.SpringEmbeddedCacheManager' (OnClassCondition)

   InfluxDbAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.influxdb.InfluxDB' (OnClassCondition)

   IntegrationAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.integration.config.EnableIntegration' (OnClassCondition)

   JCacheCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.cache.Caching' (OnClassCondition)

   JacksonAutoConfiguration.JodaDateTimeJacksonConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.joda.time.DateTime', 'com.fasterxml.jackson.datatype.joda.ser.DateTimeSerializer', 'com.fasterxml.jackson.datatype.joda.cfg.JacksonJodaDateFormat' (OnClassCondition)

   JacksonHttpMessageConvertersConfiguration.MappingJackson2XmlHttpMessageConverterConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.fasterxml.jackson.dataformat.xml.XmlMapper' (OnClassCondition)

   JerseyAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.glassfish.jersey.server.spring.SpringComponentProvider' (OnClassCondition)

   JestAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'io.searchbox.client.JestClient' (OnClassCondition)

   JmsAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'javax.jms.Message', 'org.springframework.jms.core.JmsTemplate' (OnClassCondition)

   JndiConnectionFactoryAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.jms.core.JmsTemplate' (OnClassCondition)

   JndiDataSourceAutoConfiguration:
      Did not match:
         - @ConditionalOnProperty (spring.datasource.jndi-name) did not find property 'jndi-name' (OnPropertyCondition)
      Matched:
         - @ConditionalOnClass found required classes 'javax.sql.DataSource', 'org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   JooqAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.jooq.DSLContext' (OnClassCondition)

   JpaRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.jpa.repository.JpaRepository' (OnClassCondition)

   JsonbAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.json.bind.Jsonb' (OnClassCondition)

   JsonbHttpMessageConvertersConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.json.bind.Jsonb' (OnClassCondition)

   JtaAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.transaction.Transaction' (OnClassCondition)

   KafkaAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.kafka.core.KafkaTemplate' (OnClassCondition)

   LdapAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.ldap.core.ContextSource' (OnClassCondition)

   LdapDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.ldap.repository.LdapRepository' (OnClassCondition)

   LdapRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.ldap.repository.LdapRepository' (OnClassCondition)

   LiquibaseAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'liquibase.integration.spring.SpringLiquibase', 'liquibase.change.DatabaseChange' (OnClassCondition)

   MailSenderAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.mail.internet.MimeMessage' (OnClassCondition)

   MailSenderValidatorAutoConfiguration:
      Did not match:
         - @ConditionalOnProperty (spring.mail.test-connection) did not find property 'test-connection' (OnPropertyCondition)

   MessageSourceAutoConfiguration:
      Did not match:
         - ResourceBundle did not find bundle with basename messages (MessageSourceAutoConfiguration.ResourceBundleCondition)

   MongoAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.mongodb.MongoClient' (OnClassCondition)

   MongoDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.mongodb.MongoClient', 'org.springframework.data.mongodb.core.MongoTemplate' (OnClassCondition)

   MongoReactiveAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.mongodb.reactivestreams.client.MongoClient' (OnClassCondition)

   MongoReactiveDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.mongodb.reactivestreams.client.MongoClient', 'org.springframework.data.mongodb.core.ReactiveMongoTemplate' (OnClassCondition)

   MongoReactiveRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.mongodb.reactivestreams.client.MongoClient', 'org.springframework.data.mongodb.repository.ReactiveMongoRepository' (OnClassCondition)

   MongoRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.mongodb.MongoClient', 'org.springframework.data.mongodb.repository.MongoRepository' (OnClassCondition)

   MustacheAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.samskivert.mustache.Mustache' (OnClassCondition)

   MybatisAutoConfiguration.MapperScannerRegistrarNotFoundConfiguration:
      Did not match:
         - @ConditionalOnMissingBean (types: org.mybatis.spring.mapper.MapperFactoryBean; SearchStrategy: all) found beans of type 'org.mybatis.spring.mapper.MapperFactoryBean' &departmentMapper, &employeeMapper (OnBeanCondition)

   Neo4jDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.neo4j.ogm.session.SessionFactory', 'org.springframework.data.neo4j.transaction.Neo4jTransactionManager' (OnClassCondition)

   Neo4jRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.neo4j.ogm.session.Neo4jSession', 'org.springframework.data.neo4j.repository.Neo4jRepository' (OnClassCondition)

   NoOpCacheConfiguration:
      Did not match:
         - @ConditionalOnMissingBean (types: org.springframework.cache.CacheManager; SearchStrategy: all) found beans of type 'org.springframework.cache.CacheManager' cacheManager (OnBeanCondition)
      Matched:
         - Cache org.springframework.boot.autoconfigure.cache.NoOpCacheConfiguration automatic cache type (CacheCondition)

   OAuth2ClientAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.security.config.annotation.web.configuration.EnableWebSecurity', 'org.springframework.security.oauth2.client.registration.ClientRegistration' (OnClassCondition)

   ProjectInfoAutoConfiguration#buildProperties:
      Did not match:
         - @ConditionalOnResource did not find resource '${spring.info.build.location:classpath:META-INF/build-info.properties}' (OnResourceCondition)

   ProjectInfoAutoConfiguration#gitProperties:
      Did not match:
         - GitResource did not find git info at classpath:git.properties (ProjectInfoAutoConfiguration.GitResourceAvailableCondition)

   QuartzAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.quartz.Scheduler' (OnClassCondition)

   RabbitAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.amqp.rabbit.core.RabbitTemplate', 'com.rabbitmq.client.Channel' (OnClassCondition)

   ReactiveUserDetailsServiceAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.security.authentication.ReactiveAuthenticationManager' (OnClassCondition)

   ReactiveWebServerFactoryAutoConfiguration:
      Did not match:
         - not a reactive web application (OnWebApplicationCondition)
      Matched:
         - @ConditionalOnClass found required class 'org.springframework.http.ReactiveHttpInputMessage'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   ReactorCoreAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'reactor.core.publisher.Mono', 'reactor.core.publisher.Flux' (OnClassCondition)

   RedisAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.redis.core.RedisOperations' (OnClassCondition)

   RedisCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.redis.connection.RedisConnectionFactory' (OnClassCondition)

   RedisReactiveAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.data.redis.connection.ReactiveRedisConnectionFactory', 'org.springframework.data.redis.core.ReactiveRedisTemplate', 'reactor.core.publisher.Flux' (OnClassCondition)

   RedisRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.redis.repository.configuration.EnableRedisRepositories' (OnClassCondition)

   RemoteDevToolsAutoConfiguration:
      Did not match:
         - @ConditionalOnProperty (spring.devtools.remote.secret) did not find property 'secret' (OnPropertyCondition)
      Matched:
         - @ConditionalOnClass found required classes 'javax.servlet.Filter', 'org.springframework.http.server.ServerHttpRequest'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   RepositoryRestMvcAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration' (OnClassCondition)

   SecurityAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.security.authentication.DefaultAuthenticationEventPublisher' (OnClassCondition)

   SecurityFilterAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer', 'org.springframework.security.config.http.SessionCreationPolicy' (OnClassCondition)

   SendGridAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.sendgrid.SendGrid' (OnClassCondition)

   ServletWebServerFactoryConfiguration.EmbeddedJetty:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.eclipse.jetty.server.Server', 'org.eclipse.jetty.util.Loader', 'org.eclipse.jetty.webapp.WebAppContext' (OnClassCondition)

   ServletWebServerFactoryConfiguration.EmbeddedUndertow:
      Did not match:
         - @ConditionalOnClass did not find required classes 'io.undertow.Undertow', 'org.xnio.SslClientAuthMode' (OnClassCondition)

   SessionAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.session.Session' (OnClassCondition)

   SolrAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.apache.solr.client.solrj.impl.HttpSolrClient', 'org.apache.solr.client.solrj.impl.CloudSolrClient' (OnClassCondition)

   SolrRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.apache.solr.client.solrj.SolrClient', 'org.springframework.data.solr.repository.SolrRepository' (OnClassCondition)

   SpringDataWebAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.web.PageableHandlerMethodArgumentResolver' (OnClassCondition)

   ThymeleafAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.thymeleaf.templatemode.TemplateMode' (OnClassCondition)

   TransactionAutoConfiguration.EnableTransactionManagementConfiguration.JdkDynamicAutoProxyConfiguration:
      Did not match:
         - @ConditionalOnProperty (spring.aop.proxy-target-class=false) did not find property 'proxy-target-class' (OnPropertyCondition)

   UserDetailsServiceAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.security.authentication.AuthenticationManager' (OnClassCondition)

   WebClientAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.web.reactive.function.client.WebClient' (OnClassCondition)

   WebFluxAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.web.reactive.config.WebFluxConfigurer' (OnClassCondition)

   WebFluxSecurityConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity', 'org.springframework.security.web.server.WebFilterChainProxy' (OnClassCondition)

   WebMvcAutoConfiguration.ResourceChainCustomizerConfiguration:
      Did not match:
         - @ConditionalOnEnabledResourceChain did not find class org.webjars.WebJarAssetLocator (OnEnabledResourceChainCondition)

   WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter#beanNameViewResolver:
      Did not match:
         - @ConditionalOnMissingBean (types: org.springframework.web.servlet.view.BeanNameViewResolver; SearchStrategy: all) found beans of type 'org.springframework.web.servlet.view.BeanNameViewResolver' beanNameViewResolver (OnBeanCondition)

   WebMvcAutoConfiguration.WebMvcAutoConfigurationAdapter#localeResolver:
      Did not match:
         - @ConditionalOnProperty (spring.mvc.locale) did not find property 'locale' (OnPropertyCondition)

   WebServicesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.ws.transport.http.MessageDispatcherServlet' (OnClassCondition)

   WebSocketMessagingAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer' (OnClassCondition)

   WebSocketReactiveAutoConfiguration:
      Did not match:
         - not a reactive web application (OnWebApplicationCondition)
      Matched:
         - @ConditionalOnClass found required classes 'javax.servlet.Servlet', 'javax.websocket.server.ServerContainer'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   WebSocketServletAutoConfiguration.JettyWebSocketConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.eclipse.jetty.websocket.jsr356.server.deploy.WebSocketServerContainerInitializer' (OnClassCondition)

   WebSocketServletAutoConfiguration.UndertowWebSocketConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'io.undertow.websockets.jsr.Bootstrap' (OnClassCondition)

   XADataSourceAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.transaction.TransactionManager' (OnClassCondition)


Exclusions:
-----------

    None


Unconditional classes:
----------------------

    org.springframework.boot.autoconfigure.context.PropertyPlaceholderAutoConfiguration

    org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration

    org.springframework.boot.autoconfigure.security.reactive.ReactiveSecurityAutoConfiguration

    org.springframework.boot.autoconfigure.context.ConfigurationPropertiesAutoConfiguration

    org.springframework.boot.autoconfigure.info.ProjectInfoAutoConfiguration



2018-09-08 00:35:23.579  INFO 15880 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2018-09-08 00:35:23.581  INFO 15880 --- [  restartedMain] c.z.s.Springboot01CacheApplication       : Started Springboot01CacheApplication in 1.977 seconds (JVM running for 2.532)
2018-09-08 00:35:23.583 DEBUG 15880 --- [  restartedMain] o.s.boot.devtools.restart.Restarter      : Creating new Restarter for thread Thread[main,5,main]
2018-09-08 00:35:23.583 DEBUG 15880 --- [  restartedMain] o.s.boot.devtools.restart.Restarter      : Immediately restarting application
2018-09-08 00:35:23.583 DEBUG 15880 --- [  restartedMain] o.s.boot.devtools.restart.Restarter      : Created RestartClassLoader org.springframework.boot.devtools.restart.classloader.RestartClassLoader@55ef7dd3
2018-09-08 00:35:23.583 DEBUG 15880 --- [  restartedMain] o.s.boot.devtools.restart.Restarter      : Starting application com.zzq.springboot01cache.Springboot01CacheApplication with URLs [file:/D:/springboot%e9%ab%98%e7%ba%a7/springboot-01-cache/target/classes/]

我们发现就只有一个缓存配置是注册进去了， 也就是说会产生一个缓存管理器

我们看下

  SimpleCacheConfiguration

@Bean
	public ConcurrentMapCacheManager cacheManager() {
		ConcurrentMapCacheManager cacheManager = new ConcurrentMapCacheManager();
		List<String> cacheNames = this.cacheProperties.getCacheNames();
		if (!cacheNames.isEmpty()) {
			cacheManager.setCacheNames(cacheNames);
		}
		return this.customizerInvoker.customize(cacheManager);
	}

向容器中放入要给ConcurrentMapCacheManager 这个缓存管理器

ConcurrentMapCacheManger 

从名字就能看出来，底层一定使用的是ConcurrentMap 

@Bean
	public ConcurrentMapCacheManager cacheManager() {
		ConcurrentMapCacheManager cacheManager = new ConcurrentMapCacheManager();
		List<String> cacheNames = this.cacheProperties.getCacheNames();
		if (!cacheNames.isEmpty()) {
			cacheManager.setCacheNames(cacheNames);
		}
		return this.customizerInvoker.customize(cacheManager);
	}

//设置缓存组件的名字

@Override
	@Nullable
	public Cache getCache(String name) {
		Cache cache = this.cacheMap.get(name);
		if (cache == null && this.dynamic) {
			synchronized (this.cacheMap) {
				cache = this.cacheMap.get(name);
				if (cache == null) {
					cache = createConcurrentMapCache(name);
					this.cacheMap.put(name, cache);
				}
			}
		}
		return cache;
	}

通过名字获取缓存组件，如果是null 的话， 然后就用同步代码块进行尝试，如果还是没有得到， 就直接创建一个cache

protected Cache createConcurrentMapCache(String name) {
		SerializationDelegate actualSerialization = (isStoreByValue() ? this.serialization : null);
		return new ConcurrentMapCache(name, new ConcurrentHashMap<>(256),
				isAllowNullValues(), actualSerialization);

	}

protected ConcurrentMapCache(String name, ConcurrentMap<Object, Object> store,
			boolean allowNullValues, @Nullable SerializationDelegate serialization) {

		super(allowNullValues);
		Assert.notNull(name, "Name must not be null");
		Assert.notNull(store, "Store must not be null");
		this.name = name;
		this.store = store;
		this.serialization = serialization;
	}

private final ConcurrentMap<Object, Object> store;

创建一个concurrentHashMap 集合进行缓存数据

运行流程

@Cacheable    向缓存中存数据

    *      cacheNames/value：指定缓存组件的名字;将方法的返回结果放在哪个缓存中，是数组的方式，可以指定多个缓存；
     *
     *      key：缓存数据使用的key；可以用它来指定。默认是使用方法参数的值  1-方法的返回值
     *              编写SpEL； #i d;参数id的值   #a0  #p0  #root.args[0]
     *              getEmp[2]
     *
     *      keyGenerator：key的生成器；可以自己指定key的生成器的组件id
     *              key/keyGenerator：二选一使用;
     *
     *
     *      cacheManager：指定缓存管理器；或者cacheResolver指定获取解析器
     *
     *      condition：指定符合条件的情况下才缓存；
     *              ,condition = "#id>0"
     *          condition = "#a0>1"：第一个参数的值》1的时候才进行缓存
     *
     *      unless:否定缓存；当unless指定的条件为true，方法的返回值就不会被缓存；可以获取到结果进行判断
     *              unless = "#result == null"
     *              unless = "#a0==2":如果第一个参数的值是2，结果不缓存；
     *      sync：是否使用异步模式

名字	位置	描述	示例
methodName	root object	当前被调用的方法名	#root.methodName
method	root object	当前被调用的方法	#root.method.name
target	root object	当前被调用的目标对象	#root.target
targetClass	root object	当前被调用的目标对象类	#root.targetClass
args	root object	当前被调用的方法的参数列表	#root.args[0]
caches	root object	当前方法调用使用的缓存列表（如@Cacheable(value={"cache1", "cache2"})），则有两个cache	#root.caches[0].name
argument name	evaluation context	方法参数的名字. 可以直接 #参数名 ，也可以使用 #p0或#a0 的形式，0代表参数的索引；	#iban 、 #a0 、  #p0
result	evaluation context	方法执行后的返回值（仅当方法执行之后的判断有效，如‘unless’，’cache put’的表达式 ’cache evict’的表达式beforeInvocation=false）	#result

@Cacheput  修改数据库中的某个数据，同时更新缓存

/**
     * 更新
     */
    @CachePut(key = "#employee.id")
    public Employee  updateEmp(Employee employee){
        employeeMapper.updateEmp(employee);
        return employee ;
    }

@GetMapping("/emp")
    public Employee updateEmp(Employee employee){
        return  employeeService.updateEmp(employee);
    }

1.查看

  第一次请求

2018-09-08 23:53:56.124 DEBUG 8936 --- [nio-8080-exec-2] o.s.b.w.s.f.OrderedRequestContextFilter  : Bound request context to thread: org.apache.catalina.connector.RequestFacade@1d73467b
查询员工1
2018-09-08 23:53:56.125  INFO 8936 --- [nio-8080-exec-2] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2018-09-08 23:54:01.400  INFO 8936 --- [nio-8080-exec-2] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2018-09-08 23:54:01.406 DEBUG 8936 --- [nio-8080-exec-2] c.z.s.mapper.EmployeeMapper.getEmpById   : ==>  Preparing: SELECT * FROM employee WHERE id = ? 
2018-09-08 23:54:01.416 DEBUG 8936 --- [nio-8080-exec-2] c.z.s.mapper.EmployeeMapper.getEmpById   : ==> Parameters: 1(Integer)
2018-09-08 23:54:01.798 DEBUG 8936 --- [nio-8080-exec-2] c.z.s.mapper.EmployeeMapper.getEmpById   : <==      Total: 1
2018-09-08 23:54:01.833 DEBUG 8936 --- [nio-8080-exec-2] o.s.b.w.s.f.OrderedRequestContextFilter  : Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@1d73467b

查询数据库

第二次

2018-09-08 23:54:40.618 DEBUG 8936 --- [nio-8080-exec-4] o.s.b.w.s.f.OrderedRequestContextFilter  : Bound request context to thread: org.apache.catalina.connector.RequestFacade@1d73467b
2018-09-08 23:54:40.621 DEBUG 8936 --- [nio-8080-exec-4] o.s.b.w.s.f.OrderedRequestContextFilter  : Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@1d73467b

没有对数据库进行操作

2.更新

2018-09-08 23:55:58.751 DEBUG 8936 --- [nio-8080-exec-3] o.s.b.w.s.f.OrderedRequestContextFilter  : Bound request context to thread: org.apache.catalina.connector.RequestFacade@1d73467b
2018-09-08 23:55:59.890 DEBUG 8936 --- [nio-8080-exec-3] c.z.s.mapper.EmployeeMapper.updateEmp    : ==>  Preparing: UPDATE employee SET lastName=?,email=?,gender=?,d_id=? WHERE id=? 
2018-09-08 23:55:59.891 DEBUG 8936 --- [nio-8080-exec-3] c.z.s.mapper.EmployeeMapper.updateEmp    : ==> Parameters: 张ab(String), [e-mail](String), 1(Integer), null, 1(Integer)
2018-09-08 23:56:04.531 DEBUG 8936 --- [nio-8080-exec-3] c.z.s.mapper.EmployeeMapper.updateEmp    : <==    Updates: 1
2018-09-08 23:56:04.633 DEBUG 8936 --- [nio-8080-exec-3] o.s.b.w.s.f.OrderedRequestContextFilter  : Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@1d73467b

更行成功，

查看

2018-09-08 23:57:30.997 DEBUG 8936 --- [nio-8080-exec-5] o.s.b.w.s.f.OrderedRequestContextFilter  : Bound request context to thread: org.apache.catalina.connector.RequestFacade@1d73467b
2018-09-08 23:57:30.999 DEBUG 8936 --- [nio-8080-exec-5] o.s.b.w.s.f.OrderedRequestContextFilter  : Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@1d73467b

@ CacheEvict  删除数据库的数据同时，删除缓存中的数据

/**
     * 删除操作
     * @param id
     */
    @CacheEvict(cacheNames = "emp",key = "#a0")
    public void  deleteEmp(Integer id){
        employeeMapper.deleteEmpById(id);
    }

@GetMapping("/empdelete/{id}")
    public void deleteEmp(@PathVariable("id") Integer id){
        employeeService.deleteEmp(id);
    }

@Caching 定义复杂缓存注解      @CacheConfig抽取这个类中的公共项

/**
     * 根据名字来查询
     */
    @Caching(
            cacheable= {
                @Cacheable(key = "#a0")
            },
            put = {
                @CachePut(key = "#result.email"),
                @CachePut(key = "#result.id")
            }
    )
    public Employee getEmpByName(String lastName){
       return    employeeMapper.getEmpByLastName(lastName);
    }

@CacheConfig(cacheNames = "emp")
@Service
public class EmployeeService {

Springboot 整合Redis 

1.引入redis 

<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-redis -->
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-data-redis</artifactId>
		</dependency>

2.配置redis 连接 在properties/yml全局配置文件中配置host  port  默认port是6397  

redis:
    host: 192.168.24.133
    port: 6377

使用redisTemplate 操作redis 数据库 

redis 提供了redisTemplate 模板对象操作redis ， 因为String类型的数据存储操作比较多，写了一个子类stringRedisTemplated类

string

stringStringValueOperations.set("hello","a");
        stringStringValueOperations.append("hello","b");

list

stringRedisTemplate.opsForList().leftPushAll("myList", Arrays.asList("A","b"));
//        System.out.println(stringRedisTemplate.opsForList().leftPop("myList"));  //从左边弹出

redis序列化对象

redis 默认是按照jdk提供的 Serializable  接口标识，序列化的，

super.afterPropertiesSet();

		boolean defaultUsed = false;

		if (defaultSerializer == null) {

			defaultSerializer = new JdkSerializationRedisSerializer(
					classLoader != null ? classLoader : this.getClass().getClassLoader());
		}

		if (enableDefaultSerializer) {

			if (keySerializer == null) {
				keySerializer = defaultSerializer;
				defaultUsed = true;
			}

只要我们把要要序列化的对象，实现Serializable  接口spring提供的redistemplate就会自动帮我们完成序列化

但是序列化不是只有着一种方式 ，SpringTemplate也提供了好几种序列化方式

只要我们有导入jackson 依赖，他就提供jackson2jsonRedisSerializer 这种序列化对象

我们看下redisautoconfiguraction 是如何配置默认的jskserializationredisSerializer 的

@Bean
	@ConditionalOnMissingBean(name = "redisTemplate")
	public RedisTemplate<Object, Object> redisTemplate(
			RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
		RedisTemplate<Object, Object> template = new RedisTemplate<>();
		template.setConnectionFactory(redisConnectionFactory);
		return template;
	}

创建了一个redisTemplate 对象，然后给他封装了redisConnectionFactory工厂 ， redisTemplate 中的属性

private @Nullable RedisSerializer<?> defaultSerializer;

默认会被赋值

if (defaultSerializer == null) {

			defaultSerializer = new JdkSerializationRedisSerializer(
					classLoader != null ? classLoader : this.getClass().getClassLoader());
		}

但是如果我们赋值进去，他就使用了我们自己定义的序列化方式

看代码

@Bean
    public RedisTemplate<Object, Employee> redisTemplate(
            RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
        RedisTemplate<Object, Employee> template = new RedisTemplate<>();
        template.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer json = new Jackson2JsonRedisSerializer<Employee>(Employee.class);
        template.setDefaultSerializer(json);
        return template;
    }

这样我们来运行序列化

Employee emp = employeeMapper.getEmpById(1);
        redisTemplate.opsForValue().set("object",emp);
        Object object = redisTemplate.opsForValue().get("object");
        System.out.println(object);

employee对象就被一json的方式序列化了

缓存原理 

如果我们不适用redis 他默认是用的是一个ConcurrentMapCacheManager ，使用的是SimpleCacheConfiguration configuration 类

先看CacheAutoConfiguration

/**
	 * {@link ImportSelector} to add {@link CacheType} configuration classes.
	 */
	static class CacheConfigurationImportSelector implements ImportSelector {

		@Override
		public String[] selectImports(AnnotationMetadata importingClassMetadata) {
			CacheType[] types = CacheType.values();
			String[] imports = new String[types.length];
			for (int i = 0; i < types.length; i++) {
				imports[i] = CacheConfigurations.getConfigurationClass(types[i]);
			}
			return imports;
		}

	}

public static String getConfigurationClass(CacheType cacheType) {
		Class<?> configurationClass = MAPPINGS.get(cacheType);
		Assert.state(configurationClass != null, () -> "Unknown cache type " + cacheType);
		return configurationClass.getName();
	}

static {
		Map<CacheType, Class<?>> mappings = new EnumMap<>(CacheType.class);
		mappings.put(CacheType.GENERIC, GenericCacheConfiguration.class);
		mappings.put(CacheType.EHCACHE, EhCacheCacheConfiguration.class);
		mappings.put(CacheType.HAZELCAST, HazelcastCacheConfiguration.class);
		mappings.put(CacheType.INFINISPAN, InfinispanCacheConfiguration.class);
		mappings.put(CacheType.JCACHE, JCacheCacheConfiguration.class);
		mappings.put(CacheType.COUCHBASE, CouchbaseCacheConfiguration.class);
		mappings.put(CacheType.REDIS, RedisCacheConfiguration.class);
		mappings.put(CacheType.CAFFEINE, CaffeineCacheConfiguration.class);
		mappings.put(CacheType.SIMPLE, SimpleCacheConfiguration.class);
		mappings.put(CacheType.NONE, NoOpCacheConfiguration.class);
		MAPPINGS = Collections.unmodifiableMap(mappings);
	}

这就是java 所有的缓存配置，默认是simpleCacheConfiguration 为什么我们导入了redis starter   就使用了 redis ？ 我们看下启动日志

Negative matches:
-----------------

   ActiveMQAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'javax.jms.ConnectionFactory', 'org.apache.activemq.ActiveMQConnectionFactory' (OnClassCondition)

   AopAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.aspectj.lang.annotation.Aspect', 'org.aspectj.lang.reflect.Advice', 'org.aspectj.weaver.AnnotatedElement' (OnClassCondition)

   ArtemisAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'javax.jms.ConnectionFactory', 'org.apache.activemq.artemis.jms.client.ActiveMQConnectionFactory' (OnClassCondition)

   BatchAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.batch.core.launch.JobLauncher' (OnClassCondition)

   CacheAutoConfiguration.CacheManagerJpaDependencyConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean' (OnClassCondition)

   CaffeineCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.github.benmanes.caffeine.cache.Caffeine' (OnClassCondition)

   CassandraAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.datastax.driver.core.Cluster' (OnClassCondition)

   CassandraDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.datastax.driver.core.Cluster', 'org.springframework.data.cassandra.core.CassandraAdminOperations' (OnClassCondition)

   CassandraReactiveDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.datastax.driver.core.Cluster', 'org.springframework.data.cassandra.core.ReactiveCassandraTemplate' (OnClassCondition)

   CassandraReactiveRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.data.cassandra.ReactiveSession', 'org.springframework.data.cassandra.repository.ReactiveCassandraRepository' (OnClassCondition)

   CassandraRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.datastax.driver.core.Session', 'org.springframework.data.cassandra.repository.CassandraRepository' (OnClassCondition)

   CloudAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.cloud.config.java.CloudScanConfiguration' (OnClassCondition)

   CouchbaseAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.CouchbaseBucket', 'com.couchbase.client.java.Cluster' (OnClassCondition)

   CouchbaseCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.Bucket', 'com.couchbase.client.spring.cache.CouchbaseCacheManager' (OnClassCondition)

   CouchbaseDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.Bucket', 'org.springframework.data.couchbase.repository.CouchbaseRepository' (OnClassCondition)

   CouchbaseReactiveDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.Bucket', 'org.springframework.data.couchbase.repository.ReactiveCouchbaseRepository' (OnClassCondition)

   CouchbaseReactiveRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.Bucket', 'org.springframework.data.couchbase.repository.ReactiveCouchbaseRepository' (OnClassCondition)

   CouchbaseRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.couchbase.client.java.Bucket', 'org.springframework.data.couchbase.repository.CouchbaseRepository' (OnClassCondition)

   DataSourceAutoConfiguration.EmbeddedDatabaseConfiguration:
      Did not match:
         - EmbeddedDataSource found supported pooled data source (DataSourceAutoConfiguration.EmbeddedDatabaseCondition)

   DataSourceConfiguration.Dbcp2:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.apache.commons.dbcp2.BasicDataSource' (OnClassCondition)

   DataSourceConfiguration.Generic:
      Did not match:
         - @ConditionalOnProperty (spring.datasource.type) did not find property 'spring.datasource.type' (OnPropertyCondition)

   DataSourceConfiguration.Tomcat:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.apache.tomcat.jdbc.pool.DataSource' (OnClassCondition)

   DataSourceJmxConfiguration.TomcatDataSourceJmxConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.apache.tomcat.jdbc.pool.DataSourceProxy' (OnClassCondition)

   DataSourcePoolMetadataProvidersConfiguration.CommonsDbcp2PoolDataSourceMetadataProviderConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.apache.commons.dbcp2.BasicDataSource' (OnClassCondition)

   DataSourcePoolMetadataProvidersConfiguration.TomcatDataSourcePoolMetadataProviderConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.apache.tomcat.jdbc.pool.DataSource' (OnClassCondition)

   DevToolsDataSourceAutoConfiguration.DatabaseShutdownExecutorJpaDependencyConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean' (OnClassCondition)

   DispatcherServletAutoConfiguration.DispatcherServletConfiguration#multipartResolver:
      Did not match:
         - @ConditionalOnBean (types: org.springframework.web.multipart.MultipartResolver; SearchStrategy: all) did not find any beans of type org.springframework.web.multipart.MultipartResolver (OnBeanCondition)

   EhCacheCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'net.sf.ehcache.Cache' (OnClassCondition)

   ElasticsearchAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.elasticsearch.client.Client', 'org.springframework.data.elasticsearch.client.TransportClientFactoryBean' (OnClassCondition)

   ElasticsearchDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.elasticsearch.client.Client', 'org.springframework.data.elasticsearch.core.ElasticsearchTemplate' (OnClassCondition)

   ElasticsearchRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.elasticsearch.client.Client', 'org.springframework.data.elasticsearch.repository.ElasticsearchRepository' (OnClassCondition)

   EmbeddedLdapAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.unboundid.ldap.listener.InMemoryDirectoryServer' (OnClassCondition)

   EmbeddedMongoAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.mongodb.MongoClient', 'de.flapdoodle.embed.mongo.MongodStarter' (OnClassCondition)

   EmbeddedWebServerFactoryCustomizerAutoConfiguration.JettyWebServerFactoryCustomizerConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.eclipse.jetty.server.Server', 'org.eclipse.jetty.util.Loader', 'org.eclipse.jetty.webapp.WebAppContext' (OnClassCondition)

   EmbeddedWebServerFactoryCustomizerAutoConfiguration.UndertowWebServerFactoryCustomizerConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'io.undertow.Undertow', 'org.xnio.SslClientAuthMode' (OnClassCondition)

   ErrorWebFluxAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.web.reactive.config.WebFluxConfigurer' (OnClassCondition)

   FlywayAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.flywaydb.core.Flyway' (OnClassCondition)

   FreeMarkerAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'freemarker.template.Configuration' (OnClassCondition)

   GenericCacheConfiguration:
      Did not match:
         - @ConditionalOnBean (types: org.springframework.cache.Cache; SearchStrategy: all) did not find any beans of type org.springframework.cache.Cache (OnBeanCondition)
      Matched:
         - Cache org.springframework.boot.autoconfigure.cache.GenericCacheConfiguration automatic cache type (CacheCondition)

   GroovyTemplateAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'groovy.text.markup.MarkupTemplateEngine' (OnClassCondition)

   GsonAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.google.gson.Gson' (OnClassCondition)

   GsonHttpMessageConvertersConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.google.gson.Gson' (OnClassCondition)

   H2ConsoleAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.h2.server.web.WebServlet' (OnClassCondition)

   HazelcastAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.hazelcast.core.HazelcastInstance' (OnClassCondition)

   HazelcastCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.hazelcast.core.HazelcastInstance', 'com.hazelcast.spring.cache.HazelcastCacheManager' (OnClassCondition)

   HazelcastJpaDependencyAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.hazelcast.core.HazelcastInstance', 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean' (OnClassCondition)

   HibernateJpaAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean', 'javax.persistence.EntityManager' (OnClassCondition)

   HttpHandlerAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.web.reactive.DispatcherHandler' (OnClassCondition)

   HypermediaAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.hateoas.Resource', 'org.springframework.plugin.core.Plugin' (OnClassCondition)

   InfinispanCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.infinispan.spring.provider.SpringEmbeddedCacheManager' (OnClassCondition)

   InfluxDbAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.influxdb.InfluxDB' (OnClassCondition)

   IntegrationAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.integration.config.EnableIntegration' (OnClassCondition)

   JCacheCacheConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.cache.Caching' (OnClassCondition)

   JacksonAutoConfiguration.JodaDateTimeJacksonConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.joda.time.DateTime', 'com.fasterxml.jackson.datatype.joda.ser.DateTimeSerializer', 'com.fasterxml.jackson.datatype.joda.cfg.JacksonJodaDateFormat' (OnClassCondition)

   JacksonHttpMessageConvertersConfiguration.MappingJackson2XmlHttpMessageConverterConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.fasterxml.jackson.dataformat.xml.XmlMapper' (OnClassCondition)

   JedisConnectionConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.apache.commons.pool2.impl.GenericObjectPool', 'redis.clients.jedis.Jedis' (OnClassCondition)

   JerseyAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.glassfish.jersey.server.spring.SpringComponentProvider' (OnClassCondition)

   JestAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'io.searchbox.client.JestClient' (OnClassCondition)

   JmsAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'javax.jms.Message', 'org.springframework.jms.core.JmsTemplate' (OnClassCondition)

   JndiConnectionFactoryAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.jms.core.JmsTemplate' (OnClassCondition)

   JndiDataSourceAutoConfiguration:
      Did not match:
         - @ConditionalOnProperty (spring.datasource.jndi-name) did not find property 'jndi-name' (OnPropertyCondition)
      Matched:
         - @ConditionalOnClass found required classes 'javax.sql.DataSource', 'org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   JooqAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.jooq.DSLContext' (OnClassCondition)

   JpaRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.jpa.repository.JpaRepository' (OnClassCondition)

   JsonbAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.json.bind.Jsonb' (OnClassCondition)

   JsonbHttpMessageConvertersConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.json.bind.Jsonb' (OnClassCondition)

   JtaAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.transaction.Transaction' (OnClassCondition)

   KafkaAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.kafka.core.KafkaTemplate' (OnClassCondition)

   LdapAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.ldap.core.ContextSource' (OnClassCondition)

   LdapDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.ldap.repository.LdapRepository' (OnClassCondition)

   LdapRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.ldap.repository.LdapRepository' (OnClassCondition)

   LiquibaseAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'liquibase.integration.spring.SpringLiquibase', 'liquibase.change.DatabaseChange' (OnClassCondition)

   MailSenderAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'javax.mail.internet.MimeMessage' (OnClassCondition)

   MailSenderValidatorAutoConfiguration:
      Did not match:
         - @ConditionalOnProperty (spring.mail.test-connection) did not find property 'test-connection' (OnPropertyCondition)

   MessageSourceAutoConfiguration:
      Did not match:
         - ResourceBundle did not find bundle with basename messages (MessageSourceAutoConfiguration.ResourceBundleCondition)

   MongoAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.mongodb.MongoClient' (OnClassCondition)

   MongoDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.mongodb.MongoClient', 'org.springframework.data.mongodb.core.MongoTemplate' (OnClassCondition)

   MongoReactiveAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.mongodb.reactivestreams.client.MongoClient' (OnClassCondition)

   MongoReactiveDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.mongodb.reactivestreams.client.MongoClient', 'org.springframework.data.mongodb.core.ReactiveMongoTemplate' (OnClassCondition)

   MongoReactiveRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.mongodb.reactivestreams.client.MongoClient', 'org.springframework.data.mongodb.repository.ReactiveMongoRepository' (OnClassCondition)

   MongoRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'com.mongodb.MongoClient', 'org.springframework.data.mongodb.repository.MongoRepository' (OnClassCondition)

   MustacheAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.samskivert.mustache.Mustache' (OnClassCondition)

   MybatisAutoConfiguration.MapperScannerRegistrarNotFoundConfiguration:
      Did not match:
         - @ConditionalOnMissingBean (types: org.mybatis.spring.mapper.MapperFactoryBean; SearchStrategy: all) found beans of type 'org.mybatis.spring.mapper.MapperFactoryBean' &departmentMapper, &employeeMapper (OnBeanCondition)

   Neo4jDataAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.neo4j.ogm.session.SessionFactory', 'org.springframework.data.neo4j.transaction.Neo4jTransactionManager' (OnClassCondition)

   Neo4jRepositoriesAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.neo4j.ogm.session.Neo4jSession', 'org.springframework.data.neo4j.repository.Neo4jRepository' (OnClassCondition)

   NoOpCacheConfiguration:
      Did not match:
         - @ConditionalOnMissingBean (types: org.springframework.cache.CacheManager; SearchStrategy: all) found beans of type 'org.springframework.cache.CacheManager' cacheManager (OnBeanCondition)
      Matched:
         - Cache org.springframework.boot.autoconfigure.cache.NoOpCacheConfiguration automatic cache type (CacheCondition)

   OAuth2ClientAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.security.config.annotation.web.configuration.EnableWebSecurity', 'org.springframework.security.oauth2.client.registration.ClientRegistration' (OnClassCondition)

   ProjectInfoAutoConfiguration#buildProperties:
      Did not match:
         - @ConditionalOnResource did not find resource '${spring.info.build.location:classpath:META-INF/build-info.properties}' (OnResourceCondition)

   ProjectInfoAutoConfiguration#gitProperties:
      Did not match:
         - GitResource did not find git info at classpath:git.properties (ProjectInfoAutoConfiguration.GitResourceAvailableCondition)

   QuartzAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.quartz.Scheduler' (OnClassCondition)

   RabbitAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.amqp.rabbit.core.RabbitTemplate', 'com.rabbitmq.client.Channel' (OnClassCondition)

   ReactiveUserDetailsServiceAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.security.authentication.ReactiveAuthenticationManager' (OnClassCondition)

   ReactiveWebServerFactoryAutoConfiguration:
      Did not match:
         - not a reactive web application (OnWebApplicationCondition)
      Matched:
         - @ConditionalOnClass found required class 'org.springframework.http.ReactiveHttpInputMessage'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   RedisAutoConfiguration#redisTemplate:
      Did not match:
         - @ConditionalOnMissingBean (names: redisTemplate; SearchStrategy: all) found beans named redisTemplate (OnBeanCondition)

   RemoteDevToolsAutoConfiguration:
      Did not match:
         - @ConditionalOnProperty (spring.devtools.remote.secret) did not find property 'secret' (OnPropertyCondition)
      Matched:
         - @ConditionalOnClass found required classes 'javax.servlet.Filter', 'org.springframework.http.server.ServerHttpRequest'; @ConditionalOnMissingClass did not find unwanted class (OnClassCondition)

   RepositoryRestMvcAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.data.rest.webmvc.config.RepositoryRestMvcConfiguration' (OnClassCondition)

   SecurityAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.security.authentication.DefaultAuthenticationEventPublisher' (OnClassCondition)

   SecurityFilterAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.springframework.security.web.context.AbstractSecurityWebApplicationInitializer', 'org.springframework.security.config.http.SessionCreationPolicy' (OnClassCondition)

   SendGridAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'com.sendgrid.SendGrid' (OnClassCondition)

   ServletWebServerFactoryConfiguration.EmbeddedJetty:
      Did not match:
         - @ConditionalOnClass did not find required classes 'org.eclipse.jetty.server.Server', 'org.eclipse.jetty.util.Loader', 'org.eclipse.jetty.webapp.WebAppContext' (OnClassCondition)

   ServletWebServerFactoryConfiguration.EmbeddedUndertow:
      Did not match:
         - @ConditionalOnClass did not find required classes 'io.undertow.Undertow', 'org.xnio.SslClientAuthMode' (OnClassCondition)

   SessionAutoConfiguration:
      Did not match:
         - @ConditionalOnClass did not find required class 'org.springframework.session.Session' (OnClassCondition)

   SimpleCacheConfiguration:
      Did not match:
         - @ConditionalOnMissingBean (types: org.springframework.cache.CacheManager; SearchStrategy: all) found beans of type 'org.springframework.cache.CacheManager' cacheManager (OnBeanCondition)
      Matched:
         - Cache org.springframework.boot.autoconfigure.cache.SimpleCacheConfiguration automatic cache type (CacheCondition)

simpleCacheConfiguration 是被排除的为什么？  

@Configuration
@ConditionalOnMissingBean(CacheManager.class)
@Conditional(CacheCondition.class)
class SimpleCacheConfiguration {

@ConditionaLOnMissingBean 这个注解， 

意思说看看容器中有没有CacheManager 这种类型的组件，如果有这个类就GG 不会被加载容器中 ，

之前说过

static {
		Map<CacheType, Class<?>> mappings = new EnumMap<>(CacheType.class);
		mappings.put(CacheType.GENERIC, GenericCacheConfiguration.class);
		mappings.put(CacheType.EHCACHE, EhCacheCacheConfiguration.class);
		mappings.put(CacheType.HAZELCAST, HazelcastCacheConfiguration.class);
		mappings.put(CacheType.INFINISPAN, InfinispanCacheConfiguration.class);
		mappings.put(CacheType.JCACHE, JCacheCacheConfiguration.class);
		mappings.put(CacheType.COUCHBASE, CouchbaseCacheConfiguration.class);
		mappings.put(CacheType.REDIS, RedisCacheConfiguration.class);
		mappings.put(CacheType.CAFFEINE, CaffeineCacheConfiguration.class);
		mappings.put(CacheType.SIMPLE, SimpleCacheConfiguration.class);
		mappings.put(CacheType.NONE, NoOpCacheConfiguration.class);
		MAPPINGS = Collections.unmodifiableMap(mappings);
	}

这些Configuraction 都是按照顺序加载的，我们看到redisCacheConfiguration 比SimpleCacheConfiguration 的顺序级别高，因此当加载到simpleCacheConfiguration 已经通过redisCacheConfiuration 创建了 RedisCacheManager  ，因此不会创建了simpleCacheConfiguraction 

redisCacheManager 干什么？ 

他是通过redisCache来完成缓存的

protected RedisCache createRedisCache(String name, @Nullable RedisCacheConfiguration cacheConfig) {
		return new RedisCache(name, cacheWriter, cacheConfig != null ? cacheConfig : defaultCacheConfig);
	}

redisCache通过操作redis 来进行缓存数据

默认保存数据是一k-v的形式存储的，都是object，利用序列化保存

如何存为json ? 

配置一个自定义个rediscacheManger 

package com.zzq.springboot01cache.config;

import com.sun.org.apache.bcel.internal.generic.RET;
import com.sun.org.apache.bcel.internal.generic.RETURN;
import com.zzq.springboot01cache.entity.Department;
import com.zzq.springboot01cache.entity.Employee;
import org.springframework.boot.autoconfigure.cache.CacheManagerCustomizer;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;

import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ResourceLoader;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.net.UnknownHostException;
import java.time.Duration;
import java.util.Arrays;


@Configuration
public class MyredisConfig {

    @Bean("myKeyGenerator")
    public KeyGenerator keyGenerator(){
        return   (target,method,params)->{
            return  method.getName()+"["+ Arrays.asList(params)+"]";
        };
    }

    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        // key序列化
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        // value序列化
        redisTemplate.setValueSerializer(new Jackson2JsonRedisSerializer(Object.class));
        redisTemplate.afterPropertiesSet();
        System.out.println("RedisTemplate loading.............");
        return redisTemplate;
    }


    @Bean
    public CacheManager cacheManager(RedisConnectionFactory factory) {
        RedisCacheConfiguration cacheConfiguration =
                RedisCacheConfiguration.defaultCacheConfig()
                        .entryTtl(Duration.ofDays(1))
                        .disableCachingNullValues()
                        .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new
                                GenericJackson2JsonRedisSerializer()));
        return RedisCacheManager.builder(factory).cacheDefaults(cacheConfiguration).build();
    }



}

这个参考

rediscacheconfiguraction 写

@Bean
	public RedisCacheManager cacheManager(RedisConnectionFactory redisConnectionFactory,
			ResourceLoader resourceLoader) {
		RedisCacheManagerBuilder builder = RedisCacheManager
				.builder(redisConnectionFactory)
				.cacheDefaults(determineConfiguration(resourceLoader.getClassLoader()));
		List<String> cacheNames = this.cacheProperties.getCacheNames();
		if (!cacheNames.isEmpty()) {
			builder.initialCacheNames(new LinkedHashSet<>(cacheNames));
		}
		return this.customizerInvoker.customize(builder.build());
	}