奇怪的“nameValuePairs”键在使用Gson时出现 [英] Strange "nameValuePairs" key appear when using Gson

问题描述

我试图从它的字段中重建一个 Object （我将字段作为JSONObject），如下所示：

  JSONObject jObj = new JSONObject（）; 
 
 JSONObject jObj1 = new JSONObject（）; 
 JSONObject jObj2 = new JSONObject（）; 
 
 JSONObject jObj21 = new JSONObject（）; 
 JSONObject jObj22 = new JSONObject（）; 
 
 jObj1.put（jObj11，value11）; 
 jObj1.put（jObj12，value12）; 
 
 
 jObj21.put（jObj211，value211）; // level 2 
 jObj21.put（jObj212，value212）; 
 jObj21.put（jObj213，value213）; 
 
 jObj22.put（jObj221，value221）; 
 jObj22.put（jObj222，value222）; 
 jObj22.put（jObj223，value223）; 
 
 jObj2.put（jObj21，jObj21）; // level 1 
 jObj2.put（jObj22，jObj22）; 
 
 jObj.put（jObj1，jObj1）; // level 0 
 jObj.put（jObj2，jObj2）; 
  

我使用这些行从 Obeject

  GsonBuilder builder = new GsonBuilder（）; 
 Gson gSon = builder.create（）; 
 gSon.toJSon（jObj）; 
  

问题是当我解析主要对象（jObj）与Gson，我发现一个额外的键名为nameValuePairs。那么，为什么我得到这个关键？

注意：

• 如果我在Log上执行： jObj.toString（）; ，则此键将消失。 如果我这样做： jObj.opt（nameValuePairs）; 我有 Null 作为结果（就像没有名为nameValuePairs的键）。 $ b

这是我的实际结果：

这就是我所期望的：

<我找到了类似于我的问题，但它没有帮助。

是否有人有解决方法/解决方法或可以解释此密钥的来源？

谢谢。

解决方案

尝试使用Gson的 JsonObject 而不是 JSONObject 像这样：

  JsonObject jObj = new JsonObject（）; 
 
 JsonObject jObj1 = new JsonObject（）; 
 JsonObject jObj2 = new JsonObject（）; 
 
 JsonObject jObj21 = new JsonObject（）; 
 JsonObject jObj22 = new JsonObject（）; 
 
 jObj1.addProperty（jObj11，value11）; 
 jObj1.addProperty（jObj12，value12）; 
 
 
 jObj21.addProperty（jObj211，value211）; // level 2 
 jObj21.addProperty（jObj212，value212）; 
 jObj21.addProperty（jObj213，value213）; 
 
 jObj22.addProperty（jObj221，value221）; 
 jObj22.addProperty（jObj222，value222）; 
 jObj22.addProperty（jObj223，value223）; 
 
 jObj2.add（jObj21，jObj21）; // level 1 
 jObj2.add（jObj22，jObj22）; 
 
 jObj.add（jObj1，jObj1）; // level 0 
 jObj.add（jObj2，jObj2）; 
 
 String json = new Gson（）。toJson（jObj）; 
  

I am trying to rebuild an Object from its fields( i get the fields as a JSONObject), something like this:

JSONObject jObj = new JSONObject();  

JSONObject jObj1 = new JSONObject(); 
JSONObject jObj2 = new JSONObject(); 

JSONObject jObj21 = new JSONObject(); 
JSONObject jObj22 = new JSONObject(); 

jObj1.put("jObj11", "value11");
jObj1.put("jObj12", "value12");


jObj21.put("jObj211", "value211"); // level 2 
jObj21.put("jObj212", "value212");
jObj21.put("jObj213", "value213");

jObj22.put("jObj221", "value221");
jObj22.put("jObj222", "value222");
jObj22.put("jObj223", "value223");

jObj2.put("jObj21", jObj21);  // level 1 
jObj2.put("jObj22", jObj22);

jObj.put("jObj1", jObj1); // level 0 
jObj.put("jObj2", jObj2);

I use those lines to get Json from an Obeject

GsonBuilder builder = new GsonBuilder();
Gson gSon = builder.create();
gSon.toJSon(jObj);

The Problem is when i parse the main Object ( jObj ) with Gson, i found an extra key named "nameValuePairs". So why i get this key?

Notice:

• If i do : jObj.toString(); on Log, this key disappear.
• If i do : jObj.opt("nameValuePairs"); i have Null as result (like there is no key named "nameValuePairs").

This is my actual result:

And this is what i expect to have:

I found something similar to my problem, but it doesn't help.

Is there someone who have a solution/workaround or can explain me the origin of this key?

Thanks.

解决方案

Try to use Gson's JsonObject instead of JSONObject like this:

 JsonObject jObj = new JsonObject();

    JsonObject jObj1 = new JsonObject();
    JsonObject jObj2 = new JsonObject();

    JsonObject jObj21 = new JsonObject();
    JsonObject jObj22 = new JsonObject();

    jObj1.addProperty("jObj11", "value11");
    jObj1.addProperty("jObj12", "value12");


    jObj21.addProperty("jObj211", "value211"); // level 2
    jObj21.addProperty("jObj212", "value212");
    jObj21.addProperty("jObj213", "value213");

    jObj22.addProperty("jObj221", "value221");
    jObj22.addProperty("jObj222", "value222");
    jObj22.addProperty("jObj223", "value223");

    jObj2.add("jObj21", jObj21);  // level 1
    jObj2.add("jObj22", jObj22);

    jObj.add("jObj1", jObj1); // level 0
    jObj.add("jObj2", jObj2);

    String json = new Gson().toJson(jObj);

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