1.问题描述
在redis整合springcache的时候一直报错。
按照信息找的发生问题的部分：
@Configuration
@EnableCaching
public class RedisConfig {
@Primary
@Bean
//@ConditionalOnBean(RedisConnectionFactory.class)
public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory){
RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
redisCacheConfiguration = redisCacheConfiguration
//设置缓存的默认超时时间：30分钟
.entryTtl(Duration.ofMinutes(30L))
//如果是空值，不缓存
.disableCachingNullValues()
//设置key序列化器
.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(keySerializer()))
//设置value序列化器
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(valueSerializer()));
return RedisCacheManager
.builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
.cacheDefaults(redisCacheConfiguration)
.build();
}
/**
* key序列化器
*/
private RedisSerializer<String> keySerializer() {
return new StringRedisSerializer();
}
/**
* value序列化器
*/
private RedisSerializer<Object> valueSerializer() {
return new GenericJackson2JsonRedisSerializer();
}
}
如果加上一句
@ConditionalOnBean(RedisConnectionFactory.class)
报错信息变为：
Error creating bean with name ‘redisConnectionFactory’ defined in class path resource [org/springframework/boot/autoconfigure/data/redis/LettuceConnectionConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory]: Factory method ‘redisConnectionFactory’ threw exception; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
发现在pom.xml中连接池依赖包没有导：
<!--spring cache连接池依赖包-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-pool2</artifactId>
<version>2.6.2</version>
</dependency>
再次启动：
成功了。。。what a fuck…折腾了一小时
2.自己的配置代码：
@Configuration
@EnableCaching
public class RedisConfig {
@Primary
@Bean
@ConditionalOnBean(RedisConnectionFactory.class)
public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory){
RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
redisCacheConfiguration = redisCacheConfiguration
//设置缓存的默认超时时间：30分钟
.entryTtl(Duration.ofMinutes(30L))
//如果是空值，不缓存
.disableCachingNullValues()
//设置key序列化器
.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(keySerializer()))
//设置value序列化器
.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(valueSerializer()));
return RedisCacheManager
.builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
.cacheDefaults(redisCacheConfiguration)
.build();
}
/**
* key序列化器
*/
private RedisSerializer<String> keySerializer() {
return new StringRedisSerializer();
}
/**
* value序列化器
*/
private RedisSerializer<Object> valueSerializer() {
return new GenericJackson2JsonRedisSerializer();
}
}
@Configuration
@EnableSwagger2
public class SwaggerConfig {
@Value(value = "true")
private Boolean swaggerEnabled;
@Bean
public Docket createRestApi() {
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo())
.enable(swaggerEnabled)
.select()
.apis(RequestHandlerSelectors.basePackage("com.example.rediscache.springcache"))
.paths(PathSelectors.any())
.build();
}
private ApiInfo apiInfo() {
return new ApiInfoBuilder()
.title("接口文档")
.description("Spring Boot整合redis自动生成缓存")
.termsOfServiceUrl("https：XXXX")//自己设置
.version("1.0")
.build();
}
}
@SpringBootApplication
@MapperScan(basePackages = {"com.example.rediscache.springcache.mapper"})//指定要扫描的Mapper类的包的路径
public class SpringcacheApplication {
public static void main(String[] args) {
SpringApplication.run(SpringcacheApplication.class, args);
}
}
server.port=9090
spring.redis.host=localhost
# Redis\u670D\u52A1\u5668\u8FDE\u63A5\u7AEF\u53E3
spring.redis.port=6379
# Redis\u670D\u52A1\u5668\u8FDE\u63A5\u5BC6\u7801\uFF08\u9ED8\u8BA4\u4E3A\u7A7A\uFF09
# spring.redis.password=123
# \u8FDE\u63A5\u6C60\u6700\u5927\u8FDE\u63A5\u6570\uFF08\u4F7F\u7528\u8D1F\u503C\u8868\u793A\u6CA1\u6709\u9650\u5236\uFF09 \u9ED8\u8BA4 8
spring.redis.lettuce.pool.max-active=8
# \u8FDE\u63A5\u6C60\u6700\u5927\u963B\u585E\u7B49\u5F85\u65F6\u95F4\uFF08\u4F7F\u7528\u8D1F\u503C\u8868\u793A\u6CA1\u6709\u9650\u5236\uFF09 \u9ED8\u8BA4 -1
spring.redis.lettuce.pool.max-wait=-1
# \u8FDE\u63A5\u6C60\u4E2D\u7684\u6700\u5927\u7A7A\u95F2\u8FDE\u63A5 \u9ED8\u8BA4 8
spring.redis.lettuce.pool.max-idle=8
# \u8FDE\u63A5\u6C60\u4E2D\u7684\u6700\u5C0F\u7A7A\u95F2\u8FDE\u63A5 \u9ED8\u8BA4 0
spring.redis.lettuce.pool.min-idle=0
mybatis.mapper-locations=classpath*:com/example/rediscache/springcache/mapper/xml/*.xml
输入地址：http://localhost:9090/swagger-ui.html
自己的代码目录：
总结 注意几个要点
mapperscan的路径要对（在配置文件中要写mybatis-mapper的扫描路径，springbootapplicaiton类上面要写@MapperScan(basePackages = {“com.example.rediscache.springcache.mapper”})//指定要扫描的Mapper类的包的路径
使用redis一定要注意redis的配置和mysql的配置（端口号和ip要对，有密码要配密码，redis的conf中可以修改bind 0.0.0.0, 就是用来允许任意计算机都可以连接redis服务连接。
如果bind设置为:bind 127.0.0.1,只有本台主机可以连接到redis,
