解释说明：

 当前配置类不是必须的，因为 Spring Boot 框架会自动装配 RedisTemplate 对象，但是默认的key序列化器为JdkSerializationRedisSerializer，导致我们存到Redis中后的数据和原始数据有差别

如：

但是取是可以取出来的，在java中用相同的就行

1.

package com.huing.blog.config;
 
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.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
 
 
/**
 * Redis配置类
 *
 */
@Configuration
@EnableCaching
public class RedisConfig extends CachingConfigurerSupport{
    /**
     * 配置自定义redisTemplate
     * @return
     */
    @Bean
    RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
 
        RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        // 设置值（value）的序列化采用Jackson2JsonRedisSerializer。
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        // 设置键（key）的序列化采用StringRedisSerializer。
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
 
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }
}

2.

package com.itheima.config;
 
import org.springframework.cache.annotation.CachingConfigurerSupport;
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.StringRedisSerializer;
 
/**
 * Redis配置类
 */
 
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
 
    @Bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory connectionFactory) {
 
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
 
        //默认的Key序列化器为：JdkSerializationRedisSerializer
 
        //设置新的y序列化器
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
 
        redisTemplate.setConnectionFactory(connectionFactory);
 
        return redisTemplate;
    }
 
}