本文介绍了Gson在序列化过程中添加字段的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述



这里是一个示例类来显示我的问题:

  public class A {
String id;
字符串名称;
...
}

当我序列化类AI想要返回时例如:

  {id:123,name:John Doe,url_to_user: http://www.example.com/123} 

其中url_to_user未存储在我的实例中的类A,但可以用类A的实例中的数据生成。



有没有简单的方法来做到这一点?我宁愿避免编写一个完整的序列化器来添加一个字段。

使用使用 Gson.toJsonTree 得到一个 JsonElement ,你可以动态地进行交互。

  A a = getYourAInstanceHere(); 
Gson gson = new Gson();
JsonElement jsonElement = gson.toJsonTree(a);
jsonElement.getAsJsonObject()。addProperty(url_to_user,url);
return gson.toJson(jsonElement);


I can't find a simple way to add a custom field during serialization in Gson and I was hoping someone else may be able to help.

Here is a sample class to show my issue:

public class A {
  String id;
  String name;
  ...
}

When I serialize class A I would like to return something like:

{ "id":"123", "name":"John Doe", "url_to_user":"http://www.example.com/123" }

where url_to_user is not stored in my instance of class A, but can be generated with data in the instance of class A.

Is there a simple way of doing this? I would prefer to avoid writing an entire serializer just to add one field.

解决方案

Use Gson.toJsonTree to get a JsonElement, with which you can interact dynamically.

A a = getYourAInstanceHere();
Gson gson = new Gson();
JsonElement jsonElement = gson.toJsonTree(a);
jsonElement.getAsJsonObject().addProperty("url_to_user", url);
return gson.toJson(jsonElement);

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08-22 21:36