问题描述
假设我想使用以下类从外部 JSON 负载进行反序列化:
Assuming the following class I want to use for deserialization from an external JSON payload:
public class MyObject {
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
private ZonedDateTime timestamp;
}
当我尝试使用 JSON 负载时，Jackson 抛出以下错误:
When I'm trying to consume the JSON payload, Jackson throws the following error:
Cannot deserialize value of type `java.time.ZonedDateTime` from String "2019-01-23T12:54:18.610Z": Failed to deserialize java.time.ZonedDateTime: (java.time.format.DateTimeParseException) Text '2019-01-23T12:54:18.610Z' could not be parsed at index 23
如您所见，传入的字符串是 "2019-01-23T12:54:18.610Z"，据我所知，这是一个有效的 ZonedDateTime.使用 jshell，使用 ZonedDateTime.parse("2019-01-23T12:54:18.610Z") 将该字符串解析为 ZonedDateTime 会产生我所期望的有效 ZonedDateTime.
As you can see, the incoming string is "2019-01-23T12:54:18.610Z", which is a valid ZonedDateTime as I understand it. Using jshell, parsing that string into a ZonedDateTime using ZonedDateTime.parse("2019-01-23T12:54:18.610Z") results in a valid ZonedDateTime as I would expect.
- 为什么杰克逊在这里失败了?
- 我该怎么做才能让它发挥作用?
我也不是 Spring 或 Jackson 的专家.谢谢.
I'm not an expert on Spring or Jackson, either. Thanks.
我使用的是 Spring Boot v2.1.1.RELEASE.
I'm using Spring Boot v2.1.1.RELEASE.
推荐答案
模式中的 Z 不接受值中的字面值 'Z'，改用 X 应该可行:
The Z in the pattern won't accept a literal 'Z' in the value, using X instead should work:
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd'T'HH:mm:ss.SSSX")
模式被指定为 Java SimpleDateFormat - Java 10 参考 此处.
The pattern is specified as a Java SimpleDateFormat - Java 10 reference here.
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