Spring Cache Redis配置_cachekeyprefix 前缀拼接

1.导入cache依赖包

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

2.yml配置 选择Redis作为存储

  cache:
    type: redis
    redis: #单位毫秒
      time-to-live: 360000
      key-prefix: CACHE_ #key前缀
      use-key-prefix: true #是否开启key前缀
      cache-null-values: true #是否缓存空值

3.编写RedisCacheConfig配置文件

package com.atguigu.gulimall.product.config;
 
import org.springframework.boot.autoconfigure.cache.CacheProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.StringRedisSerializer;
 
/**
 * 我RedisCache配置
 *
 * @author 万天铭
 * @date 2022/05/14
 */
@EnableConfigurationProperties(CacheProperties.class) //启用配置文件方式
@Configuration
@EnableCaching //开启RedisCache
public class MyCacheConfig {
 
    /**
     * RedisCache配置
     *
     * @return {@link RedisCacheConfiguration}
     */
    @Bean
    RedisCacheConfiguration redisCacheConfiguration(CacheProperties cacheProperties) {
        //将配置key value 序列化
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
        config = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()));
        config = config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));
 
 
       //将配置文件中的所有配置都生效
        CacheProperties.Redis redisProperties = cacheProperties.getRedis();
            if (redisProperties.getTimeToLive() != null) {
                config = config.entryTtl(redisProperties.getTimeToLive());
            }
            if (redisProperties.getKeyPrefix() != null) {
                config = config.prefixKeysWith(redisProperties.getKeyPrefix());
            }
            if (!redisProperties.isCacheNullValues()) {
                config = config.disableCachingNullValues();
            }
            if (!redisProperties.isUseKeyPrefix()) {
                config = config.disableKeyPrefix();
            }
        return config;
    }
}

(Cache在分布式下还是比较鸡肋的，个人推荐还是使用RedisTemplate比较好一点)

4.Spring Cache 注解作用

@Cachecble 触发将数据保存到缓存的操作

@CacheEvicet 触发将数据从缓存中删除 

@CachePut 不影响方法执行更新缓存

@Caching 组和以上的多个操作

@CacheConfig 在类级别共享缓存的相同配置