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解决日期转化Json异常- Date JSON parse error

作者：上官天夜

这篇文章主要介绍了解决日期转化Json异常- Date JSON parse error问题。具有很好的参考价值，希望对大家有所帮助。如有错误或未考虑完全的地方，望不吝赐教

日期转化Json异常- Date JSON parse error

1、做JUnit功能测试的时候

抛出如下异常

org.springframework.web.client.RestClientException: Error while extracting response for type 
[class com.imooc.entity.Product] and content type [application/json;charset=UTF-8];
 nested exception is org.springframework.http.converter.HttpMessageNotReadableException: 
 JSON parse error: Cannot deserialize value of type `java.util.Date` from String "2018-10-19 21:33:16": 
 not a valid representation (error: Failed to parse Date value '2018-10-19 21:33:16': 
 Cannot parse date "2018-10-19 21:33:16": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSSZ', 
 parsing fails (leniency? null)); nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.util.Date` from String "2018-10-19 21:33:16": not a valid representation (error: Failed to parse Date value '2018-10-19 21:33:16': Cannot parse date "2018-10-19 21:33:16": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSSZ', parsing fails (leniency? null))
 at [Source: (PushbackInputStream); line: 1, column: 141] (through reference chain: com.imooc.entity.Product["createAt"])
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:115)
    at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:689)
    at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:644)
    at org.springframework.web.client.RestTemplate.postForObject(RestTemplate.java:399)
    at com.imooc.util.RestUtil.postJSON(RestUtil.java:31)
    at com.imooc.controller.ProductControllerTest.lambda$0(ProductControllerTest.java:59)
    at java.util.ArrayList.forEach(Unknown Source)
    at com.imooc.controller.ProductControllerTest.testAddProduct(ProductControllerTest.java:58)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73)
    at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize value of type `java.util.Date` from String "2018-10-19 21:33:16": not a valid representation (error: Failed to parse Date value '2018-10-19 21:33:16': Cannot parse date "2018-10-19 21:33:16": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSSZ', parsing fails (leniency? null)); nested exception is com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.util.Date` from String "2018-10-19 21:33:16": not a valid representation (error: Failed to parse Date value '2018-10-19 21:33:16': Cannot parse date "2018-10-19 21:33:16": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSSZ', parsing fails (leniency? null))
 at [Source: (PushbackInputStream); line: 1, column: 141] (through reference chain: com.imooc.entity.Product["createAt"])
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:243)
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.read(AbstractJackson2HttpMessageConverter.java:225)
    at org.springframework.web.client.HttpMessageConverterExtractor.extractData(HttpMessageConverterExtractor.java:100)
    ... 39 more
Caused by: com.fasterxml.jackson.databind.exc.InvalidFormatException: Cannot deserialize value of type `java.util.Date` from String "2018-10-19 21:33:16": not a valid representation (error: Failed to parse Date value '2018-10-19 21:33:16': Cannot parse date "2018-10-19 21:33:16": while it seems to fit format 'yyyy-MM-dd'T'HH:mm:ss.SSSZ', parsing fails (leniency? null))
 at [Source: (PushbackInputStream); line: 1, column: 141] (through reference chain: com.imooc.entity.Product["createAt"])
    at com.fasterxml.jackson.databind.exc.InvalidFormatException.from(InvalidFormatException.java:67)
    at com.fasterxml.jackson.databind.DeserializationContext.weirdStringException(DeserializationContext.java:1548)
    at com.fasterxml.jackson.databind.DeserializationContext.handleWeirdStringValue(DeserializationContext.java:910)
    at com.fasterxml.jackson.databind.deser.std.StdDeserializer._parseDate(StdDeserializer.java:524)
    at com.fasterxml.jackson.databind.deser.std.StdDeserializer._parseDate(StdDeserializer.java:467)
    at com.fasterxml.jackson.databind.deser.std.DateDeserializers$DateBasedDeserializer._parseDate(DateDeserializers.java:195)
    at com.fasterxml.jackson.databind.deser.std.DateDeserializers$DateDeserializer.deserialize(DateDeserializers.java:285)
    at com.fasterxml.jackson.databind.deser.std.DateDeserializers$DateDeserializer.deserialize(DateDeserializers.java:268)
    at com.fasterxml.jackson.databind.deser.impl.MethodProperty.deserializeAndSet(MethodProperty.java:127)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:369)
    at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:159)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4013)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3084)
    at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.readJavaType(AbstractJackson2HttpMessageConverter.java:237)
    ... 41 more 

2、原因

主要问题就是实体类的Date转化Json过程出现错误，

请求数据格式为：

'yyyy-MM-dd HH:mm:ss',但是在接收到数据的时候，需要通过jackson把数据转化成userDto对象。

jackson转化的时候，默认的时间格式是 'yyyy-MM-dd'T'HH:mm:ss.SSS’,所以就会出现上面的异常。

3、解决方案

@DateTimeFormat(pattern = "yyyy-MM-dd HH:mm:ss")
    @JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss")
	@Column(name="update_at",columnDefinition="datetime comment '更新时间'")
	private Date updateAt;

解决JSON parse error: Cannot deserialize value of type `java.util.Date` from String

如题，这个错误是因为前端传的日期到后端之后不能解析

解决办法

在你的实体类中的 Date类型的变量上面加两个自动解析的注解，比如：

在这里插入图片描述

由此传时间变量的时候前后端同事就可以开心的玩耍了~ 但是这是Date这个老类型，那JDK8之后的新日期类型LocalDate和新时间类型 LocalTime，会是什么效果？不知道，没试~

总结

以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。

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