SpringCache缓存自定义配置

/**
 * 查询所有1级分类
 * @Cacheable代表当前方法的结果需要缓存,若缓存中有则方法不会调用,若缓存中没有会调用方法并将结果放入缓存
 * 缓存默认行为:
 * a.若缓存中有则方法不会被调用
 * b.key默认自动生成,缓存的名字::SimpleKey []   (自动生成的key值)
 * c.缓存的value值,默认使用jdk序列化机制,将序列化后的数据存到redis
 * d.默认ttl时间为-1
 * @return
 */
@Cacheable(value = {"category"},key ="'TopCategorys'" )
@Override
public List<CategoryEntity> getTopCategorys() {
    System.out.println(".....getTopCategorys..........");
    long startTime = System.currentTimeMillis();
    List<CategoryEntity> categoryEntityList = this.baseMapper.selectList(
            new QueryWrapper<CategoryEntity>().eq("parent_cid", 0));
    System.out.println("消耗时间:" + (System.currentTimeMillis() - startTime));
    return categoryEntityList;
}

 /**
     * 查询所有1级分类
     * @Cacheable代表当前方法的结果需要缓存,若缓存中有则方法不会调用,若缓存中没有会调用方法并将结果放入缓存
     * 缓存默认行为:
     * a.若缓存中有则方法不会被调用
     * b.key默认自动生成,缓存的名字::SimpleKey []   (自动生成的key值)
     * c.缓存的value值,默认使用jdk序列化机制,将序列化后的数据存到redis
     * d.默认ttl时间为-1
     * @return
     */
   // @Cacheable(value = {"category"},key ="'TopCategorys'" )
    @Cacheable(value = {"category"},key ="#root.method.name" )
    @Override
    public List<CategoryEntity> getTopCategorys() {
        System.out.println(".....getTopCategorys..........");
        long startTime = System.currentTimeMillis();
        List<CategoryEntity> categoryEntityList = this.baseMapper.selectList(
                new QueryWrapper<CategoryEntity>().eq("parent_cid", 0));
        System.out.println("消耗时间:" + (System.currentTimeMillis() - startTime));
        return categoryEntityList;
    }

package com.atguigu.gulimall.product.config;

import org.springframework.boot.autoconfigure.cache.CacheProperties;
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;

/**
 * 缓存配置
 * @author zfh
 * @email hst1406959716@163.com
 * @date 2021-12-25 09:40:46
 */
@EnableCaching
@Configuration
public class MyCacheConfig {

    @Bean
    RedisCacheConfiguration redisCacheConfiguration(){
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
        // config = config.entryTtl();
        config = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()));
        config = config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));
        return config;
    }
}

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;

/**
 * 缓存配置
 * @author zfh
 * @email hst1406959716@163.com
 * @date 2021-12-25 09:40:46
 */
@EnableConfigurationProperties(CacheProperties.class)
@EnableCaching
@Configuration
public class MyCacheConfig {

    @Bean
    RedisCacheConfiguration redisCacheConfiguration(CacheProperties cacheProperties){
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
        // config = config.entryTtl();
        config = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()));
        config = config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));

        CacheProperties.Redis redisProperties = cacheProperties.getRedis();
        //将配置文件中所有的配置都生效
        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;
    }
}

spring.cache.type=redis

#spring.cache.cache-names=qq
#TTL 毫秒为单位
spring.cache.redis.time-to-live=3600000

#如果指定了前缀就用我们指定的前缀，如果没有就默认使用缓存的名字作为前缀
spring.cache.redis.key-prefix=CACHE_
spring.cache.redis.use-key-prefix=true

spring.cache.type=redis

#spring.cache.cache-names=qq
#TTL 毫秒为单位
spring.cache.redis.time-to-live=3600000

#如果指定了前缀就用我们指定的前缀，如果没有就默认使用缓存的名字作为前缀
spring.cache.redis.key-prefix=CACHE_
spring.cache.redis.use-key-prefix=true

#是否缓存空值，防止缓存穿透
spring.cache.redis.cache-null-values=true

  /**
     * 查询所有1级分类
     * @Cacheable代表当前方法的结果需要缓存,若缓存中有则方法不会调用,若缓存中没有会调用方法并将结果放入缓存
     * 缓存默认行为:
     * a.若缓存中有则方法不会被调用
     * b.key默认自动生成,缓存的名字::SimpleKey []   (自动生成的key值)
     * c.缓存的value值,默认使用jdk序列化机制,将序列化后的数据存到redis
     * d.默认ttl时间为-1
     *
     * 原理:
     *   CacheAutoConfiguration(selectImports方法)--->CacheConfigurations(MAPPINGS)
     *   --->RedisCacheConfiguration-->cacheManager方法--->RedisCacheManager初始化所有的缓存(determineConfiguration方法
     *   每个缓存决定使用什么配置) --->createConfiguration方法
     * @return
     */
   // @Cacheable(value = {"category"},key ="'TopCategorys'" )
    @Cacheable(value = {"category"},key ="#root.method.name" )
    @Override
    public List<CategoryEntity> getTopCategorys() {
        System.out.println(".....getTopCategorys..........");
        long startTime = System.currentTimeMillis();
        List<CategoryEntity> categoryEntityList = this.baseMapper.selectList(
                new QueryWrapper<CategoryEntity>().eq("parent_cid", 0));
        System.out.println("消耗时间:" + (System.currentTimeMillis() - startTime));
//        return categoryEntityList;
        return null;
    }