spring中redis的使用 spring结合redis

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mob6454cc7b8169 2023-07-12 13:56:08

文章标签 spring中redis的使用 java中注解操作redis spring User List 文章分类 Redis 数据库

在《Redis之——Spring整合Redis》一文中，向大家介绍了如何将spring与Redis整合起来，但不是基于注解的形式，很多同学都希望能够通过注解的形式来简单的将Spring与Redis整合起来，这样，在使用的时候，只需要在相应的方法上加上注解，便可以使方法轻松的调用Redis的缓存。那么今天就来向大家介绍如何用基于注解的形式来整合Spring与Redis。

一、项目搭建

今天，我们不使用hibernate来操作数据库了，我们今天选择的框架是： Spring4(包括mvc、context、orm) + MyBatis3，所以，我们今天的基础架构是：Spring4(包括mvc、context、orm) + MyBatis3+Redis

1、构建pom.xml

xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
4.0.0
lyz
lyz
1.0.0
war
lyz
Basic Data Platform
UTF-8
4.2.0.RELEASE
org.springframework
spring-context
${spring.version}
org.springframework
spring-aop
${spring.version}
org.springframework
spring-webmvc
${spring.version}
org.springframework
spring-web
${spring.version}
javax.servlet
jstl
1.2
commons-logging
commons-logging
1.1.3
org.codehaus.jackson
jackson-mapper-asl
1.9.13
com.fasterxml.jackson.core
jackson-annotations
2.6.1
com.fasterxml.jackson.core
jackson-core
2.6.1
com.fasterxml.jackson.core
jackson-databind
2.6.1
org.springframework
spring-orm
${spring.version}
org.mybatis
mybatis-spring
1.2.3
mysql
mysql-connector-java
5.1.36
org.mybatis
mybatis
3.3.0
c3p0
c3p0
0.9.1.2
org.slf4j
slf4j-log4j12
1.7.12
log4j
log4j
1.2.17
org.springframework.data
spring-data-redis
1.6.0.RELEASE
redis.clients
jedis
2.7.3
maven-compiler-plugin
3.1
1.7
1.7
maven-war-plugin
2.4
WebContent
false
2、创建测试数据库：lyz，测试数据表：user
DROP DATABASE IF EXISTS `lyz`;
CREATE DATABASE `lyz`;
DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`name` varchar(255) DEFAULT NULL,
`sex` varchar(255) DEFAULT NULL,
`age` int(11) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
3、创建实体类user
package com.lyz.user.bean;
import java.io.Serializable;
import org.codehaus.jackson.map.annotate.JsonSerialize;
import com.fasterxml.jackson.databind.PropertyNamingStrategy;
import com.fasterxml.jackson.databind.annotation.JsonNaming;
/**
* 用户实体类
* @author liuyazhuang
*
*/
@JsonSerialize
@JsonNaming(PropertyNamingStrategy.LowerCaseWithUnderscoresStrategy.class)
public class User implements Serializable{
private static final long serialVersionUID = 1332643889208978231L;
/**
* id
*/
private Integer id;
/**
* 姓名
*/
private String name;
/**
* 性别
*/
private String sex;
/**
* 年龄
*/
private Integer age;
public User() {
super();
}
public User(Integer id, String name) {
super();
this.id = id;
this.name = name;
}
public User(String name, String sex, Integer age) {
super();
this.name = name;
this.sex = sex;
this.age = age;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", sex=" + sex + ", age=" + age + "]";
}
}

4、创建UserMapper接口

此接口定义了与MyBatis交互的接口协议，通过此接口与MyBatis框架通信，由MyBatis框架实现对数据库的增删改查操作。

package com.lyz.user.mapper;
import java.util.List;
import com.lyz.user.bean.User;
/**
* UserMapper接口
* @author liuyazhuang
*
*/
public interface UserMapper {
/**
* 保存用户
* @param user
*/
void saveUser(User user);
/**
* 获取所有用户列表
* @return
*/
List getAllUser();
/**
* 根据id查询用户信息
* @param id
* @return
*/
User getUserById(Integer id);
/**
* 更新用户的名称
* @param user
*/
void renameUser(User user);
/**
* 根据id删除指定的用户
* @param id
*/
void deleteUserById(Integer id);
}

5、创建UserMapper.xml

此文件中主要实现了UserMapper接口定义的方法，即实现对数据库的增删改查操作。

insert into user (name, sex, age)
values ( #{name}, #{sex}, #{age} )
select u.id, u.name, u.sex, u.age from user u
select u.id, u.name, u.sex, u.age from user u where u.id = #{id}
update user set name = #{name} where id = #{id}
delete from user where id = #{id}

6、创建UserDao接口

package com.lyz.user.dao;
import java.util.List;
import com.lyz.user.bean.User;
/**
* 用户dao接口
* @author liuyazhuang
*
*/
public interface UserDao {
/**
* 保存用户
* @param user
*/
void saveUser(User user);
/**
* 获取所有用户列表
* @return
*/
List getAllUser();
/**
* 根据id查询用户信息
* @param id
* @return
*/
User getById(Integer id);
/**
* 更新用户的名称
* @param user
*/
void rename(User user);
/**
* 根据id删除指定的用户
* @param id
*/
void deleteById(Integer id);
}

7、创建UserDao的实现类UserDaoImpl

此类主要实现UserDao中定义的接口，主要实现方法是注入UserMapper接口的实例对象，调用UserMapper接口实例的方法来实现相应的操作。

package com.lyz.user.dao.impl;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Repository;
import com.lyz.user.bean.User;
import com.lyz.user.dao.UserDao;
import com.lyz.user.mapper.UserMapper;
/**
* Dao实现类
* @author liuyazhuang
*
*/
@Repository
public class UserDaoImpl implements UserDao {
@Resource
private UserMapper mUserMapper;
@Override
public void saveUser(User user) {
mUserMapper.saveUser(user);
}
@Override
public List getAllUser() {
return mUserMapper.getAllUser();
}
@Override
public User getById(Integer id) {
return mUserMapper.getUserById(id);
}
@Override
public void rename(User user) {
mUserMapper.renameUser(user);
}
@Override
public void deleteById(Integer id) {
mUserMapper.deleteUserById(id);
}
}

8、创建UserService接口

package com.lyz.user.service;
import java.util.List;
import com.lyz.user.bean.User;
/**
* 用户service接口
* @author liuyazhuang
*
*/
public interface UserService {
/**
* 保存用户
* @param user
*/
void saveUser(String name, String sex, Integer age);
/**
* 获取所有用户列表
* @return
*/
List getAllUser();
/**
* 根据id查询用户信息
* @param id
* @return
*/
User getUserById(Integer id);
/**
* 更新用户的名称
* @param user
*/
void renameUser(String name, Integer id);
/**
* 根据id删除指定的用户
* @param id
*/
void deleteUserById(Integer id);
}
9、创建UserService接口实现类UserServiceImpl
package com.lyz.user.service.impl;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import com.lyz.user.bean.User;
import com.lyz.user.dao.UserDao;
import com.lyz.user.service.UserService;
/**
* UserService实现类
* @author liuyazhuang
*
*/
@Service
@Transactional(propagation=Propagation.REQUIRED, rollbackFor=Exception.class)
public class UserServiceImpl implements UserService {
@Resource
private UserDao mUserDao;
@Override
@CacheEvict(value = { "saveUser"}, allEntries = true)
public void saveUser(String name, String sex, Integer age) {
User user = new User(name, sex, age);
mUserDao.saveUser(user);
}
@Override
@Cacheable("getAllUser")
public List getAllUser() {
return mUserDao.getAllUser();
}
@Override
@Cacheable("getUserById")
public User getUserById(Integer id) {
return mUserDao.getById(id);
}
@Override
@CacheEvict(value = { "getAllUser", "getUserById" }, allEntries = true)
public void renameUser(String name, Integer id) {
mUserDao.rename(new User(id, name));
}
@Override
@CacheEvict(value = { "getAllUser", "getUserById" }, allEntries = true)
public void deleteUserById(Integer id) {
mUserDao.deleteById(id);
}
}

10、创建UserController

package com.lyz.user.controller;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import com.lyz.user.bean.User;
import com.lyz.user.service.UserService;
/**
* UserController类
* @author liuyazhuang
*
*/
@Controller
@RequestMapping("/user")
public class UserController {
private final Log logger = LogFactory.getLog(this.getClass());
@Autowired
private UserService mUserService;
/**
* 保存用户
* @param name
* @param sex
* @param age
* @return
*/
@RequestMapping("/save")
@ResponseBody
public Integer save(@RequestParam(value="name", defaultValue="") String name,
@RequestParam(value="sex", defaultValue="") String sex,
@RequestParam(value="age", defaultValue="0") String age){
logger.debug(name);
mUserService.saveUser(name, sex, Integer.parseInt(age));
return 1;
}
/**
* 获取所有用户列表
* @return
*/
@RequestMapping("/getall")
@ResponseBody
public Object getAllUser(){
List users = mUserService.getAllUser();
for(User u : users){
logger.debug(u.toString());
}
return users;
}
/**
* 根据用户id获取用户信息
* @return
*/
@RequestMapping("/getUserById")
@ResponseBody
public Object getUserById(@RequestParam(value="id", defaultValue="0") String id){
User user = mUserService.getUserById(Integer.parseInt(id));
logger.debug(user.toString());
return user;
}
/**
* 根据用户id获取用户信息
* @return
*/
@RequestMapping("/renameUser")
@ResponseBody
public Integer renameUser(@RequestParam(value="id", defaultValue="0") String id,
@RequestParam(value="name", defaultValue="") String name){
logger.debug(id + "=========" + name);
mUserService.renameUser(name, Integer.parseInt(id));
return 1;
}
/**
* 根据用户id获取用户信息
* @return
*/
@RequestMapping("/delete")
@ResponseBody
public Integer delete(@RequestParam(value="id", defaultValue="0") String id){
logger.debug(id);
mUserService.deleteUserById(Integer.parseInt(id));
return 1;
}
}

到此，只要再创建相应的配置文件，我们就可以实现Spring+MyBatis框架的整合了，下面我们创建一个整合Redis的关键类RedisCacheConfig，这个类继承CachingConfigurerSupport。

11、创建RedisCacheConfig类

package com.lyz.cache.redis;
import java.lang.reflect.Method;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.connection.jedis.JedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
/**
* 以Spring与配置文件来管理的redis缓存配置类
* @author liuyazhuang
*
*/
@Configuration
@EnableCaching
public class RedisCacheConfig extends CachingConfigurerSupport {
private volatile JedisConnectionFactory mJedisConnectionFactory;
private volatile RedisTemplate mRedisTemplate;
private volatile RedisCacheManager mRedisCacheManager;
public RedisCacheConfig() {
super();
}
public RedisCacheConfig(JedisConnectionFactory mJedisConnectionFactory, RedisTemplate mRedisTemplate,
RedisCacheManager mRedisCacheManager) {
super();
this.mJedisConnectionFactory = mJedisConnectionFactory;
this.mRedisTemplate = mRedisTemplate;
this.mRedisCacheManager = mRedisCacheManager;
}
public JedisConnectionFactory redisConnectionFactory() {
return mJedisConnectionFactory;
}
public RedisTemplate redisTemplate(RedisConnectionFactory cf) {
return mRedisTemplate;
}
public CacheManager cacheManager(RedisTemplate, ?> redisTemplate) {
return mRedisCacheManager;
}
@Bean
public KeyGenerator customKeyGenerator() {
return new KeyGenerator() {
@Override
public Object generate(Object o, Method method, Object... objects) {
StringBuilder sb = new StringBuilder();
sb.append(o.getClass().getName());
sb.append(method.getName());
for (Object obj : objects) {
sb.append(obj.toString());
}
return sb.toString();
}
};
}
}

这个类中的所有属性、字段都是在Spring的配置文件lyz-applicationContext.xml文件中注入的，稍后我们介绍如何注入这些属性字段。

下面介绍每个配置文件的内容，注：所有的配置文件(除了web.xml)，都是放在classpath路径下的。

12、创建数据库的配置文件jdbc.properties

jdbc.host=127.0.0.1
jdbc.database=lyz
jdbc.port=3306
jdbc.username=root
jdbc.password=root

13、创建log4j日志配置文件log4j.properties

# Global logging configuration
log4j.rootLogger=WARN,stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c:%L - %m%n
# mybatis log
log4j.logger.com.lyz.user.mapper.UserMapper=DEBUG
# lyz log
log4j.logger.com.lyz.user.controller=DEBUG
log4j.logger.com.lyz.user.service=DEBUG

14、创建redis配置文件redis.properties

# Redis settings
redis.host=192.168.157.130
redis.port=6379
redis.pass=liuyazhuang
redis.dbIndex=0
redis.expiration=3000
redis.maxIdle=300
redis.maxActive=600
redis.maxWait=1000
redis.testOnBorrow=true

15、创建SpringMVC的配置文件lyzmvc-servlet.xml

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd">
class="org.springframework.web.servlet.view.UrlBasedViewResolver">
value="org.springframework.web.servlet.view.JstlView" />
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
application/json;charset=UTF-8

16、创建MyBatis配置文件mybatis-config.xml

17、创建Spring核心配置文件lyz-applicationContext.xml

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
classpath:jdbc.properties
classpath:redis.properties
destroy-method="close">

注：在lyz-applicationContext.xml配置文件中，配置了Spring的注解、注入了RedisCacheConfig中的属性字段。

18、完善web.xml文件

xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
id="WebApp_ID" version="3.0">
lyz
encodingFilter
org.springframework.web.filter.CharacterEncodingFilter
encoding
UTF-8
forceEncoding
true
encodingFilter
/*
contextConfigLocation
/WEB-INF/classes/*-applicationContext.xml
org.springframework.web.context.ContextLoaderListener
lyzmvc
org.springframework.web.servlet.DispatcherServlet
contextConfigLocation
/WEB-INF/classes/*-servlet.xml
1
lyzmvc
*.json
*.html

二、运行测试

这里我们使用Apache JMeter来测试我们的程序，大家可以到http://jmeter.apache.org/download_jmeter.cgi下载Apache JMeter。

1、启动程序，使用JMeter调用保存用户接口

首先按照图示配置JMeter,其中访问路径和端口按照实际需要配置：

spring中redis的使用 spring结合redis_spring中redis的使用