Spring Boot 无法反序列化包含 OffsetDateTime 的对象

Question

我正在尝试调用一个休息端点，它返回一个 pojo 对象，如下所示：

public class Process   {
  @JsonProperty("id")
  private String id = null;

  @JsonProperty("processDefinitionId")
  private String processDefinitionId = null;

  @JsonProperty("businessKey")
  private String businessKey = null;

  @JsonProperty("startedAt")
  private OffsetDateTime startedAt = null;

  @JsonProperty("endedAt")
  private OffsetDateTime endedAt = null;

  @JsonProperty("durationInMs")
  private Integer durationInMs = null;

  @JsonProperty("startActivityDefinitionId")
  private String startActivityDefinitionId = null;

  @JsonProperty("endActivityDefinitionId")
  private String endActivityDefinitionId = null;

  @JsonProperty("startUserId")
  private String startUserId = null;

  @JsonProperty("deleteReason")
  private String deleteReason = null;

  //constructors and setters+getters
}

这是调用：

ResponseEntity<Process> responseModel = restTemplate.exchange("http://localhost:8062/processes", HttpMethod.POST, httpEntity, Process.class);

问题是我尝试了一些方法，例如忽略 OffsetDateTime 属性或尝试更改该日期的格式，但它会抛出此错误：

com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `org.threeten.bp.OffsetDateTime` (no Creators, like default construct, exist): no String-argument constructor/factory method to deserialize from String value ('2019-10-04T13:20:29.315Z')

或者它将返回 null :( 解决这个问题的好解决方案是什么？

Answer 1

该错误表明它无法构造 org. Threeten.bp.OffsetDateTime 的实例。你需要使用

java.time.offsetdatetime

然后在你的模型中你可以按照你喜欢的方式格式化它，例如

@JsonProperty("endedAt") //this line is not needed when it is the same as the instance variable name
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd@HH:mm:ss.SSSZ")
private OffsetDateTime endedAt;