一. 背景描述
spring 的 @cacheable 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
- */
- public class FastJsonRedisSerializer<T> implements RedisSerializer<T> {
- public static final Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
- private Class<T> clazz;
- public FastJsonRedisSerializer(Class<T> clazz) {
- super();
- this.clazz = clazz;
- }
- @Override
- public byte[] serialize(T t) throws SerializationException {
- if (t == null) {
- return new byte[0];
- }
- return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
- }
- @Override
- public T deserialize(byte[] bytes) throws SerializationException {
- if (bytes == null || bytes.length <= 0) {
- return null;
- }
- String str = new String(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
- @EnableCaching
- public class RedisConfig extends CachingConfigurerSupport {
- /**
- * 设置 redis 数据默认过期时间
- * 设置 @cacheable 序列化方式
- * @return
- */
- @Bean
- public RedisCacheConfiguration redisCacheConfiguration(){
- FastJsonRedisSerializer<Object> fastJsonRedisSerializer = new FastJsonRedisSerializer<>(Object.class);
- RedisCacheConfiguration configuration = RedisCacheConfiguration.defaultCacheConfig();
- configuration = configuration.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(fastJsonRedisSerializer)).entryTtl(Duration.ofDays(30));
- return configuration;
- }
- }
来源: https://blog.csdn.net/b376924098/article/details/79820642