无法将类型 [java.lang.String] 的属性值转换为所需类型 [java.time.LocalDate]答案

【问题标题】：Failed to convert property value of type [java.lang.String] to required type [java.time.LocalDate]无法将类型 [java.lang.String] 的属性值转换为所需类型 [java.time.LocalDate]
【发布时间】：2017-05-12 23:19:26
【问题描述】：

{
"toDepartureDate": "2016-12-28",
"fromDepartureDate": "2016-12-28"
}

我想在 json 中以 java.time.LocalDate 的形式发布上述字符串日期，但我收到 400 Bad Request 作为错误。有人可以在这里帮忙吗？我用过@JsonFormat，但它也没有帮助我。

@JsonFormat(shape=JsonFormat.Shape.STRING,pattern="yyyy-MM-dd",timezone = "GMT+5:30")

private LocalDate fromDepartureDate;

@JsonFormat(shape=JsonFormat.Shape.STRING,pattern="yyyy-MM-dd",timezone = "GMT+5:30")
private LocalDate toDepartureDate;




{
  "timestamp": 1482942147246,
  "status": 400,
  "error": "Bad Request",
  "exception": "org.springframework.validation.BindException",
  "errors": [
    {
      "codes": [
        "typeMismatch.flightReportSearchDto.fromDepartureDate",
        "typeMismatch.fromDepartureDate",
        "typeMismatch.java.time.LocalDate",
        "typeMismatch"
      ],
      "arguments": [
        {
          "codes": [
            "flightReportSearchDto.fromDepartureDate",
            "fromDepartureDate"
          ],
          "arguments": null,
          "defaultMessage": "fromDepartureDate",
          "code": "fromDepartureDate"
        }
      ],
      "defaultMessage": "Failed to convert property value of type [java.lang.String] to required type [java.time.LocalDate] for property 'fromDepartureDate'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@com.fasterxml.jackson.annotation.JsonFormat java.time.LocalDate] for value '2016-12-28'; nested exception is java.lang.IllegalArgumentException: Parse attempt failed for value [2016-12-28]",
      "objectName": "flightReportSearchDto",
      "field": "fromDepartureDate",
      "rejectedValue": "2016-12-28",
      "bindingFailure": true,
      "code": "typeMismatch"
    },
    {
      "codes": [
        "typeMismatch.flightReportSearchDto.toDepartureDate",
        "typeMismatch.toDepartureDate",
        "typeMismatch.java.time.LocalDate",
        "typeMismatch"
      ],
      "arguments": [
        {
          "codes": [
            "flightReportSearchDto.toDepartureDate",
            "toDepartureDate"
          ],
          "arguments": null,
          "defaultMessage": "toDepartureDate",
          "code": "toDepartureDate"
        }
      ],
      "defaultMessage": "Failed to convert property value of type [java.lang.String] to required type [java.time.LocalDate] for property 'toDepartureDate'; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [@com.fasterxml.jackson.annotation.JsonFormat java.time.LocalDate] for value '2016-12-29'; nested exception is java.lang.IllegalArgumentException: Parse attempt failed for value [2016-12-29]",
      "objectName": "flightReportSearchDto",
      "field": "toDepartureDate",
      "rejectedValue": "2016-12-29",
      "bindingFailure": true,
      "code": "typeMismatch"
    }
  ]

}

【问题讨论】：

看起来像这个的副本：stackoverflow.com/questions/28802544/…

标签： java json api spring-boot jackson

【解决方案1】：

添加日期属性

@DateTimeFormat(iso = DateTimeFormat.ISO.DATE)

【讨论】：

【解决方案2】：

@DateTimeFormat(iso = DateTimeFormat.ISO.DATE)

上一个答案对我来说很好。只是补充一下，如果需要更改日期格式，可以使用这句话：

th:value="${#temporals.format(fromDepartureDate,'yyyy-MM-dd')}"

【讨论】：