redis工具类 使对象以json格式存储

若不自定义序列化方式 即 redis默认序列化方式

@Data
@AllArgsConstructor
@NoArgsConstructor
@Accessors(chain = true)
public class User implements Serializable {
          
   
   private Integer id;
   private String name;
   private String passwd;
}

redis中存储结果为：

这种方式是采用JDK默认的方式将对象序列化，处理的并不好（不直观，且浪费存储空间），所以要进行手动指定。

常用的有两种方式实现： 这里采用其一： 自定义指定普通类型的Key，Value的序列化方式和HASH类型的Key，Value的序列化方式。将原本的JDK序列化方式转为将对象转为JSON即字符串进行存储。

使用redis json形式存储对象

要先对redis进行配置

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.jsontype.impl.LaissezFaireSubTypeValidator;
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;
import java.io.Serializable;
@Configuration
public class RedisConfig {
          
   
    @Bean
    public RedisTemplate<Serializable, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
          
   
        RedisTemplate<Serializable, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        // 使用Jackson2JsonRedisSerialize替换默认序列化
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.activateDefaultTyping(new LaissezFaireSubTypeValidator(),
                ObjectMapper.DefaultTyping.EVERYTHING);
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }
}

@Autowired
RedisTemplate redisTemplate;

redisTemplate.opsForValue().set("User_"+token,user,30,TimeUnit.DAYS);

结果为：