环境配置

jdk11    springboot 2.6.13    <dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId><version>3.2.0</version>
</dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-cache</artifactId><version>3.2.0</version>
</dependency>

  redis:host: 192.168.2.129port: 6379username: defaultpassword: 'linux02'database: 1
#    默认使用lettucelettuce:pool:
#        最大连接数，最大空闲数，最小空闲数max-active: 5max-idle: 2min-idle: 2#    缓存10min，允许缓存null值防止缓存穿透cache:type: redisredis:time-to-live: 600cache-null-values: true

代码

java">  @Cacheable(cacheNames = BLOG_CACHE_PREFIX + "otherPassages", key = "#userId")@Overridepublic List<PassageTitleVO> getOtherPassagesByUserId(Long userId) {........return passageTitleVOS;}

解决

网上找了一些案例，有的不需要写cacheConfig，有些需要写，我之前就用过cacheable的注解，当时就是上面的配置，没写配置类也有效果，这次我最开始就没写，然后Cacheable注解就没效果了，最后写了个cacheConfig才解决。

java">
@Configuration
@EnableCaching
public class CacheConfig extends CachingConfigurerSupport {@Beanpublic RedisCacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {return RedisCacheManager.builder(redisConnectionFactory).build();}}

然后又发现yml设置的过期时间没有生效，存到redis的是永不过期，又在 cacheConfig配置了过期时间，600s

java">@Configuration
@EnableCaching
public class CacheConfig extends CachingConfigurerSupport {@Beanpublic RedisCacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofSeconds(600));return RedisCacheManager.builder(redisConnectionFactory).cacheDefaults(redisCacheConfiguration).build();}}