SpringBoot RedisTemplate 设置Redis 缓存Key前缀和自定义序列化

RedisTemplate 设置Redis 缓存Key前缀

实现接口RedisSerializer

package com.paotuidriver.congfig;

import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;

import java.nio.charset.Charset;

/**
 * 为redis key 统一加上前缀
 */
public class RedisKeySerializer implements RedisSerializer<String> {

    /**
     * 编码格式
     */
    private final Charset charset;

    /**
     * 前缀
     */
    private final String PREFIX_KEY = "liuzhiguang:";

    public RedisKeySerializer() {
        this(Charset.forName("UTF8"));
    }

    public RedisKeySerializer(Charset charset) {
        this.charset = charset;
    }

    /**
     * Serialize the given object to binary data.
     *
     * @param s object to serialize. Can be {@literal null}.
     * @return the equivalent binary data. Can be {@literal null}.
     */
    @Override
    public byte[] serialize(String cacheKey) throws SerializationException {
        String key = PREFIX_KEY + cacheKey;
        return key.getBytes(charset);
    }

    /**
     * Deserialize an object from the given binary data.
     *
     * @param bytes object binary representation. Can be {@literal null}.
     * @return the equivalent object instance. Can be {@literal null}.
     */
    @Override
    public String deserialize(byte[] bytes) throws SerializationException {
        String cacheKey = new String(bytes, charset);
        int indexOf = cacheKey.indexOf(PREFIX_KEY);
        if (indexOf == -1) {
            cacheKey = PREFIX_KEY + cacheKey;
        }
        return (cacheKey.getBytes() == null ? null : cacheKey);
    }
}

RedisTemplate 设置Redis 自定义序列化

package com.paotuidriver.congfig;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;

@Configuration
public class RedisConfig {
    /**
     * 重写Redis序列化方式，使用Json方式:
     * 当我们的数据存储到Redis的时候，我们的键（key）和值（value）都是通过Spring提供的Serializer序列化到数据库的。
     * RedisTemplate默认使用的是JdkSerializationRedisSerializer，StringRedisTemplate默认使用的是StringRedisSerializer。
     * Spring Data JPA为我们提供了下面的Serializer：
     * GenericToStringSerializer、Jackson2JsonRedisSerializer、JacksonJsonRedisSerializer、JdkSerializationRedisSerializer、OxmSerializer、StringRedisSerializer。
     * 在此我们将自己配置RedisTemplate并定义Serializer。
     *
     * @param redisConnectionFactory
     * @return
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        // 设置连接工厂
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        // 创建 JSON 序列化工具
        GenericJackson2JsonRedisSerializer jsonRedisSerializer = new GenericJackson2JsonRedisSerializer();
        // 设置 key 的序列化
        RedisKeySerializer redisKeySerializer=new RedisKeySerializer();
        redisTemplate.setKeySerializer(redisKeySerializer);
        redisTemplate.setHashKeySerializer(redisKeySerializer);
        // 设置 value 的序列化
        redisTemplate.setValueSerializer(jsonRedisSerializer);
        redisTemplate.setHashValueSerializer(jsonRedisSerializer);
        // 返回
        return  redisTemplate;
    }
}

``