日期格式序列话问题！

来源：5-5 Redis集中式缓存商品详情页接入（下）

Code_Deli

2020-07-04

老师，我一开始做项目时候并没有按照你的使用joda-time ，我使用的是util包下的date类，现在进行了序列话出现了下面的错误：能不能帮忙看下，哪里出错了。感谢！
org.springframework.data.redis.serializer.SerializationException: Could not write JSON: Type id handling not implemented for type java.util.Date (by serializer of type com.qdl.serializer.DateJsonSerializer) (through reference chain: com.qdl.service.model.ItemModel[“promoModel”]->com.qdl.service.model.PromoModel[“startDate”]); nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Type id handling not implemented for type java.util.Date (by serializer of type com.qdl.serializer.DateJsonSerializer) (through reference chain: com.qdl.service.model.ItemModel[“promoModel”]->com.qdl.service.model.PromoModel[“startDate”])

写回答

2回答

755378268

2022-10-20

@Configuration
public class ObjectMapperConfig {

    /**
     * 设置json转换时间格式
     */
    @Bean
    public ObjectMapper objectMapper() {
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
        objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));
        return objectMapper;
    }

    /**
     * 转成String解决前端long类型精度丢失问题
     */
    @Bean
    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer() {
        return (jacksonObjectMapperBuilder) -> jacksonObjectMapperBuilder.serializerByType(Long.class, ToStringSerializer.instance).serializerByType(Long.TYPE, ToStringSerializer.instance);
    }

}