Jackson:忽略 Json 配置值 [英] Jackson: Ignore Json configuration value

问题描述

我有以下 json 文件:

I have the following json file:

{
  "segments": {        
            "externalId": 123, 
            "name": "Tomas Zulberti", 
            "shouldInform": true, 
            "id": 4
   }
}

但是java模型如下:

But the java model is as follows:

public class Segment {

    private String id;
    private String name;
    private boolean shouldInform;

    // getter and setters here...
}

当 Jackson 解析它时会引发异常，因为externalId"字段没有 getter 或 setter.是否有可用于忽略 json 字段的装饰器?

When Jackson is parsing it raises an exception becuase there is no getter or setter for the field "externalId". It there a decorator that can be used to ignore a json field?

推荐答案

可以使用注解@JsonIgnoreProperties;如果它只是您想跳过的一个值，例如:

You can use annotation @JsonIgnoreProperties; if it's just one value you want to skip, something like:

@JsonIgnoreProperties({"externalId"})

或者忽略任何不能使用的东西:

or to ignore anything that can't be used:

@JsonIgnoreProperties(ignoreUnknown=true)

还有其他方法可以做到这一点，其余的请查看 FasterXML Jackson wiki.

There are other ways to do it too, for rest check out FasterXML Jackson wiki.

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