从JSONObject中获取字符串 [英] Getting a string out of a JSONObject

问题描述

我正在尝试从请求API的JSONObject中获取一个字符串。

I'm trying to get a string out of a JSONObject that I'm receiving from a request to an API.

我的JSONObject如下：

My JSONObject is as follows:

{
  "status":"success",
  "message":"user authenticated",
  "data": { "id":11,
            "username":"2160481",
            "token":"MEznhD8RE1-ykZLOdGs4i9ZfRFQl5h_"
  }
}

我尝试了一些我在这里找到的回复，比如getString（token）没有成功。我也尝试在里面创建一个带有JSONObject的数组并从中获取字符串，但也没有成功。

I've tried some responses I found here, like the getString("token") with no success. I've also tried to create an array with the JSONObject inside and get the string from there, also with no success.

编辑：

尝试1：

String data = response.toString();
JSONObject teste = new JSONObject(data);
String status = teste.getString("status");
System.out.println(status);

尝试2：

String token = null;
        try {
            JSONArray arr = new JSONArray();
            arr.put(response);
            JSONObject jObj = arr.getJSONObject(0);
            token = jObj.getString("token");
    System.out.println("---> Token: " + token);
        } catch (JSONException e) {
            System.out.println("---> Error:" + e);
        }

尝试3：

String token = null;
        try {
            token = response.getString("token");
    System.out.println("---> Token: " + token);

    } catch (JSONException e) {
        System.out.println("---> Error:" + e);
    }`

推荐答案

您的令牌字段在里面另一个JSONObject数据，所以你必须执行以下操作

Your token field is inside another JSONObject data so you'll have to do the following

yourMainObject.getJSONObject("data").getString("token");

如果您不确定您的令牌将是否也可以使用optString（）方法而不是getString永远存在

You can also use optString() method instead of getString if you're not sure that your token will always be present

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