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【spring boot】2.0 配置@cacheable 自定
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
*/
publicclassFastJsonRedisSerializer<T> implementsRedisSerializer<T> {
publicstaticfinal Charset DEFAULT_CHARSET = Charset.forName("UTF-8");
private Class<T> clazz;
publicFastJsonRedisSerializer(Class<T> clazz){
super();
this.clazz = clazz;
}
@Override
publicbyte[] serialize(T t) throws SerializationException {
if (t == null) {
returnnewbyte[0];
}
return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
}
@Override
public T deserialize(byte[] bytes)throws SerializationException {
if (bytes == null || bytes.length <= 0) {
returnnull;
}
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
publicclassRedisConfigextendsCachingConfigurerSupport{
/**
* 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;
}
}
