用变量键分析json [英] Parse json with variable key

问题描述

以下是json响应，其中key是可变的（GUID）

我该如何解析它？

  {
87329751-7493-7329- uh83-739823748596：{
type：work，
status：online，
icon：固定电话，
号码： 102，
display_number：[phone]
} 
} 
  

Map code>。注意一个 Map< String，SomeObject> 就是你的JSON所代表的，因为你有一个> 对象 p>

  {someString：{...}} 
  

因此，首先包含JSON数据的类（在伪代码中）：

  class YourClass 
字符串类型
字符串状态
字符串图标
整数
字符串display_number 
  

然后使用 Map 来解析您的JSON响应，如下所示：

  Gson gson = new Gson（）; 
 Type type = new TypeToken< Map< String，YourClass>>（）{} .getType（）; 
地图< String，YourClass> map = gson.fromJson（jsonString，type）; 
  

现在您可以使用 Map

  String GUID = map.keySet（）。get（0）; 
 String type = map.get（GUID）.getType（）; 
  

注意：如果您只想获取GUID值，则不需要创建类 YourClass ，您可以使用相同的解析代码，但在中使用通用的 Object Map ，即 Map< String，Object> 。

I just came up with challenging problem.

Below is json response where key is variable (a GUID)

How can I parse it? I've tried Google Gson, but that didn't work.

{
  "87329751-7493-7329-uh83-739823748596": {
    "type": "work",
    "status": "online",
    "icon": "landline",
    "number": 102,
    "display_number": "[phone]"
  }
}

解决方案

If you use Gson, in order to parse your response you can create a custom class representing your JSON data, and then you can use a Map.

Note that a Map<String, SomeObject> is exactly what your JSON represents, since you have an object, containing a pair of string and some object:

{ "someString": {...} }

So, first your class containing the JSON data (in pseudo-code):

class YourClass
  String type
  String status
  String icon
  int number
  String display_number

Then parse your JSON response using a Map, like this:

Gson gson = new Gson();
Type type = new TypeToken<Map<String, YourClass>>() {}.getType();
Map<String, YourClass> map = gson.fromJson(jsonString, type);

Now you can access all the values using your Map, for example:

String GUID = map.keySet().get(0);
String type = map.get(GUID).getType();

Note: if you only want to get the GUID value, you don't need to create a class YourClass, and you can use the same parsing code, but using a generic Object in the Map, i.e., Map<String, Object>.

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