java - 如何在java中读取嵌套的json列表？

Question

我需要获取类型值和 networkUsage 下载值并且列表是动态的

Json 响应是

    {
  "count": 2,
  "devices": [
    {
      "name": "xyz",
      "type": 1,
      "subType": 0,
      "signalStrength": -37,
      "dataUsage": {
        "download": 84,
        "upload": 84
      },
      "networkUsage": {
        "download": 0,
        "upload": 0
      },
      "speed": {
        "download": 0,
        "upload": 0
      }
    },
    {
      "name": "abcd",
      "type": 2,
      "subType": 0,
      "signalStrength": -37,
      "dataUsage": {
        "download": 84,
        "upload": 84
      },
      "networkUsage": {
        "download": 0,
        "upload": 0
      },
      "speed": {
        "download": 0,
        "upload": 0
      }
    }
  ]
}

我尝试了这种方式并得到了错误。

JSONArray jsonarray = new JSONArray(response);
System.out.println(String.format("JSONArray length => %d", jsonarray.length()));

for (int i = 0; i < jsonarray.length(); i++) {
        JSONObject obj1 = jsonarray.getJSONObject(i);
        String name = obj1.getString("name");
        int type = obj1.getInt("type");
        System.out.println(name);
        System.out.println(type);
}

线程“主”org.json.JSONException 中的异常：JSONArray 文本必须以 org.json.JSONTokener.syntaxError(JSONTokener.java:496) 处 org.json.JSONArray.(JSONArray.java) 处的字符 1 处的 '[' 开头:115) 在 org.json.JSONArray.(JSONArray.java:159) 在 com.calix.pages.test.main(test.java:91)

标签： javaseleniumautomation

Answer 1

JSONObject jsonobj = new JSONObject(response);
JSONArray jsonarray = jsonobj.getJSONArray("devices");
for (int i = 0; i < jsonobj.getInt("count"); i++) {
        JSONObject obj1 = jsonarray.getJSONObject(i);
        String name = obj1.getString("name");
        int type = obj1.getInt("type");
        System.out.println(name);
        System.out.println(type);
}