【spring boot】2.0 配置@cacheable 自定义序列化方式缓存数据到redis

一&m; id dot;背景描述

spring 的 @ cache able 已成为我们比较常用的缓存数据的方式，但是把非String对象缓存到 redis 后在使用RedisDesktopManager等软件查看缓存的数据的时候展示的是HEX 数据，观察起来比较不方便，所以我们这里自定义了FastJsonRedisSerializer 序列化对象后缓存到redis，可以更方便的观察缓存数据。

二·引入jar包

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

<dependency><groupId>com.alibaba</groupId><artifactId>fastJson</artifactId><version>1.2.17</version></dependency>

三· 代码

1·自定义序列化方式

import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.serializer.SerializerFeature;import org.springframework.data.redis.serializer.RedisSerializer;import org.springframework.data.redis.serializer.SerializationException;import java.nio.charset.Charset;/**
 * 说明:自定义redis序列化方式
 *
 * @author WangBin
 * @version V1.0
 * @since 2018.03.22
 */publicclassFastJsonRedisSerializer<T>implementsRedisSerializer<T>{publicstaticfinalCharset DEFAULT_CHARSET =Charset.forName("UTF-8");privateClass<T> clazz;publicFastJsonRedisSerializer(Class<T> clazz){super();this.clazz = clazz;}@Overridepublicbyte[] serialize(T t)throwsSerializationException{if(t ==null){returnnewbyte[0];}return JSON.toJSONString(t,SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);}@Overridepublic T deserialize(byte[] bytes)throwsSerializationException{if(bytes ==null|| bytes.length <=0){returnnull;}String str =newString(bytes, DEFAULT_CHARSET);return JSON.parseObject(str, clazz);}}

2· 配置

import org.springframework.cache.annotation.CachingConfigurerSupport;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.RedisSerializationContext;import java.time.Duration;/**
 *
 * @author WangBin
 * @version V1.0
 * @date 2017.12.05
 */@Configuration@EnableCachingpublicclassRedisConfigextendsCachingConfigurerSupport{/**
     *  设置 redis 数据默认过期时间
     *  设置@cacheable 序列化方式
     * @return
     */@BeanpublicRedisCacheConfiguration redisCacheConfiguration(){FastJsonRedisSerializer<Object> fastJsonRedisSerializer =newFastJsonRedisSerializer<>(Object.class);RedisCacheConfiguration configuration =RedisCacheConfiguration.defaultCacheConfig();
        configuration = configuration.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(fastJsonRedisSerializer)).entryTtl(Duration.ofDays(30));return configuration;}}