redis key和value的乱码问题解决，含日期转化格式问题

• 在项目中，遇到的问题是redis的key和value出现的乱码问题：
• 而原本的内容为下：

{
    "status":"success",
    "data":{
        "id":3,
        "title":"花林",
        "price":99,
        "stock":81,
        "description":"美女一只",
        "sales":17,
        "imgUrl":"https://xiaolei1996.oss-cn-shanghai.aliyuncs.com/blog/title/we1.jpg",
        "promoStatus":2,
        "promoPrice":50,
        "promoId":1,
        "startDate":"2020-03-23 21:50:59"
    }
}

• 原因： 是因为和redis内部的编码协议出现了问题，所以需要改进。spring提供了一个优化方案。springboot的redisTemplate改进。

@Component
@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 3600)
public class RedisConfig {
    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory factory){
        RedisTemplate redisTemplate = new RedisTemplate();
        redisTemplate.setConnectionFactory(factory);

        //首先解决key的序列化问题
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        redisTemplate.setKeySerializer(stringRedisSerializer);

        //解决value的序列化问题
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);

        return redisTemplate;
    }
}

• 比之前好了，但是还有点小问题，json的数据比以前多了，这是因为日期的转化出现问题，这块的知识触及盲区，就先把解决方案写下面，以后有时间在研究。

public class JodaDateTimeJsonSerializer extends JsonSerializer<DateTime> {
    @Override
    public void serialize(DateTime value, JsonGenerator gen, SerializerProvider serializers) throws IOException {
        gen.writeString(value.toString("yyyy-MM-dd HH:mm:ss"));

    }
}

public class JodaDateTimeJsonDeserializer extends JsonDeserializer<DateTime> {
    @Override
    public DateTime deserialize(JsonParser p, DeserializationContext ctxt
    ) throws IOException, JsonProcessingException {
       String dateString= p.readValueAs(String.class);
        DateTimeFormatter dateTimeFormatter = DateTimeFormat.forPattern("yyyy-MM-dd HH:mm:ss");

        return DateTime.parse(dateString,dateTimeFormatter);//转成
    }
}

@Component
@EnableRedisHttpSession(maxInactiveIntervalInSeconds = 3600)
public class RedisConfig {
    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory factory){
        RedisTemplate redisTemplate = new RedisTemplate();
        redisTemplate.setConnectionFactory(factory);

        //首先解决key的序列化问题
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();
        redisTemplate.setKeySerializer(stringRedisSerializer);

        //解决value的序列化问题
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);

        //改进日期转化问题
        ObjectMapper objectMapper = new ObjectMapper();
        SimpleModule simpleModule = new SimpleModule();
        simpleModule.addSerializer(DateTime.class,new JodaDateTimeJsonSerializer());
        simpleModule.addDeserializer(DateTime.class,new JodaDateTimeJsonDeserializer());

//解决反序列化问题	objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        objectMapper.registerModule(simpleModule);
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);

        return redisTemplate;
    }
}

• 最后终于出现了预期的效果