【错误】Cannot construct instance of `java.time.Instant`或 illeal localdatetime string : 2024-03-29 17:01

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前言

项目中使用的日期格式是：private Instant time;
当进行反序列化时，报错：Cannot construct instance of ‘java.time.Instant’ 或 illeal localdatetime string : 2024-03-29 17:01:42

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提示：以下是本篇文章正文内容，下面案例可供参考

一、错误详情

• 使用 objectMapper 报错：Cannot construct instance of java.time.Instant 错误

InfluxdbRespDto vo = new ObjectMapper().convertValue(rCommonPort.getData(), InfluxdbRespDto.class);

java.lang.IllegalArgumentException: Cannot construct instance of `java.time.Instant` (no Creators, like default construct, exist): no String-argument constructor/factory method to deserialize from String value ('2024-03-29 16:52:22')
 at [Source: UNKNOWN; line: -1, column: -1] (through reference chain: com.sty.common.dto.influxdb.InfluxdbRespDto["commonPortResList"]->java.util.ArrayList[0]->com.sty.common.model.influxdb.response.CommonPortRes["time"])
	at com.fasterxml.jackson.databind.ObjectMapper._convert(ObjectMapper.java:3938) ~[jackson-databind-2.10.3.jar:2.10.3]
	at com.fasterxml.jackson.databind.ObjectMapper.convertValue(ObjectMapper.java:3869) ~[jackson-databind-2.10.3.jar:2.10.3]

• 使用 fastjson 报错：illeal localdatetime string : 2024-03-29 17:01:42

InfluxdbRespDto vo = JSON.parseObject(JSON.toJSONString(rCommonPort.getData()), InfluxdbRespDto.class);

com.alibaba.fastjson.JSONException: illeal localdatetime string : 2024-03-29 17:01:42
	at com.alibaba.fastjson.JSON.parseObject(JSON.java:108) ~[fastjson-2.0.0.jar:na]
	at com.alibaba.fastjson.JSON.parseObject(JSON.java:87) ~[fastjson-2.0.0.jar:na]

二、解决方案

1.使用 objectMapper

ObjectMapper objectMapper = new ObjectMapper()
                        .findAndRegisterModules()
                        .disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
InfluxdbRespDto vo = objectMapper.convertValue(rCommonPort.getData(), InfluxdbRespDto.class);

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总结

拥有时，不管再欢喜，都好似一边欢喜，一边有另一个自己在空中俯瞰着自己，提醒着自己失去。因为这份清醒理智，纵使欢喜也带着隐隐的伤感，而真正失去时，因为早有准备，纵使难过也会平静的接受。——长相思