杰克逊使用JsonSerialize.Inclusion.NON_NULL除了一个类 [英] Jackson use JsonSerialize.Inclusion.NON_NULL except for one class

问题描述

我通常使用objectMapper.setSerializationInclusion（JsonSerialize.Inclusion.NON_NULL），因为我从不希望序列化我的类的空值。除了现在我应该写出一个特定的字段，即使它是null。我可以在这一个字段上添加一个快速注释来覆盖该字段的Inclusion.NON_NULL属性吗？有什么好办法实现这个目标？

I normally use objectMapper.setSerializationInclusion(JsonSerialize.Inclusion.NON_NULL) because I never want the null values of my classes serialized. Except now I have a specific field should be written out, even if it is null. Is there a quick annotation I can put on this one field that overrides the Inclusion.NON_NULL property for that one field? What's a good way to achieve this?

推荐答案

使用Jackson 1.x你可以使用 @JsonSerialize（ include = Include.ALWAYS）和Jackson 2.x你可以使用 @JsonInclude（Include.ALWAYS）。这些注释将覆盖 ObjectMapper 中的默认配置。

With Jackson 1.x you can use @JsonSerialize(include=Include.ALWAYS) and with Jackson 2.x you can use @JsonInclude(Include.ALWAYS). These annotations will override the default config from your ObjectMapper.

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