Spring缓存指定Redis做为缓存中间件Demo笔记

news2024/9/22 17:24:24

文档地址D:/Test10/redisdemo和springcachedemo

E:/FTPshangchuang/smbms

一下是SpringBoot整合Redis的初略配置,引入Redis依赖

想自己测试的话

链接：https://pan.baidu.com/s/14hdBzdjtFu0lYmZUhy_DuA
提取码：j0m8

Redis配置文件

package com.kgc.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.CachingConfigurerSupport;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

import java.time.Duration;
import java.util.HashMap;
import java.util.Map;

@Configuration
public class RedisConfig extends CachingConfigurerSupport {
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();
        template.setConnectionFactory(factory);

        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        // key采用String的序列化方式
        template.setKeySerializer(stringRedisSerializer);
        // hash的key也采用String的序列化方式
        template.setHashKeySerializer(stringRedisSerializer);
        // value序列化方式采用jackson
        template.setValueSerializer(jackson2JsonRedisSerializer());
        // hash的value序列化方式采用jackson
        template.setHashValueSerializer(jackson2JsonRedisSerializer());
        template.afterPropertiesSet();
        return template;
    }

    /**
     * json序列化
     * @return
     */
    public RedisSerializer<Object> jackson2JsonRedisSerializer() {
        //使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值
        Jackson2JsonRedisSerializer<Object> serializer = new Jackson2JsonRedisSerializer<Object>(Object.class);
        ObjectMapper mapper = new ObjectMapper();
        mapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        mapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        serializer.setObjectMapper(mapper);
        return serializer;
    }

    @Bean
    public CacheManager cacheManager(RedisConnectionFactory connectionFactory) {
        //生成一个默认配置，通过config对象即可对缓存进行自定义配置
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();
        config = config
                // 设置 key为string序列化
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()))
                // 设置value为json序列化
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer() ))
                // 不缓存空值
                .disableCachingNullValues()
                // 设置缓存的默认过期时间 30分钟
                .entryTtl(Duration.ofMinutes(30L));

        //特殊缓存空间应用不同的配置
        Map<String, RedisCacheConfiguration> map = new HashMap<>();
        map.put("provider1", config.entryTtl(Duration.ofMinutes(30L)));//provider1缓存空间过期时间 30分钟
        map.put("provider2", config.entryTtl(Duration.ofHours(1L)));//provider2缓存空间过期时间 1小时

        //使用自定义的缓存配置初始化一个RedisCacheManager
        RedisCacheManager cacheManager = RedisCacheManager.builder(connectionFactory)
                .cacheDefaults(config) //默认配置
                .withInitialCacheConfigurations(map) //特殊缓存
                .transactionAware() //事务
                .build();

        return cacheManager;
    }

}

注意,一下是改掉了RedisTemplate的存的时候采用JSON的序列化方式,不然,用RedisTemplate存,需要实体实现序列化,且会用IO序列化,看不懂的编码