SpringCache的简介和使用教程

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
</dependency>

@Cacheable   触发将数据保存到缓存的操作
@CacheEvict  将数据从缓存删除
@CachePut    不影响方法执行 更新缓存
@Caching     组合以上多个操作
@CacheConfig 在类级别，共享缓存的相同配置

@Cacheable("cateGory")
@Override
public List<CategoryEntity> getLevel1Categorys() {
    System.out.println("getLevel1Categorys方法执行......");
    List<CategoryEntity> categoryEntities = this.baseMapper
        .selectList(new QueryWrapper<CategoryEntity>().eq("parent_cid", "0"));
    return categoryEntities;
}

@Cacheable(value = {"category"},key="'level1Categorys'")

#以毫秒为单位
spring.cache.redis.time-to-live=3600000

@EnableConfigurationProperties(CacheProperties.class)    //@EnableConfigurationProperties注解 可以使CacheProperties类注入到容器中
@Configuration
@EnableCaching
public class MyCacheConfig {

    @Bean
    RedisCacheConfiguration redisCacheConfiguration(CacheProperties cacheProperties){
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
        config=config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()));
        config=config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JSONRedisSerializer()));

        CacheProperties.Redis redisCacheProperties = cacheProperties.getRedis();
        if(redisCacheProperties.getTimeToLive()!=null){
            config = config.entryTtl(redisCacheProperties.getTimeToLive());
        }
        return config;
    }
}

@CacheEvict(value="category",allEntries=true)