Question

如何从JSON对象获取所有名称作为字符串数组

 {
    "status_code": 200,
    "status": "success",
    "data": [
      {
    "id": 1,
    "name": "Ajay"
    },
      {
    "id": 2,
    "name": "Balaji"
    },
      {
    "id": 3,
    "name": "Vinoth"
    }
    ]
    }

预期输出：

["Ajay","Balaji","Vinoth"]

Answer 1

您可以使用JSONObject和JSONArray，如以下示例所示：

{'profiles': [{'name':'john', 'age': 44}, {'name':'Alex','age':11}]}

JSONObject myjson = new JSONObject(the_json);
JSONArray the_json_array = myjson.getJSONArray("profiles");

int size = the_json_array.length();
ArrayList<JSONObject> arrays = new ArrayList<JSONObject>();
for (int i = 0; i < size; i++) {
    JSONObject another_json_object = the_json_array.getJSONObject(i);
        //Blah blah blah...
        arrays.add(another_json_object);
}

//Finally
JSONObject[] jsons = new JSONObject[arrays.size()];
arrays.toArray(jsons);

Answer 2

您可以简单地使用Array.map()函数。

var jsonObj = {
    "status_code": 200,
    "status": "success",
    "data": [
      {
    "id": 1,
    "name": "Ajay"
    },
      {
    "id": 2,
    "name": "Balaji"
    },
      {
    "id": 3,
    "name": "Vinoth"
    }
    ]
};
var stringArr = jsonObj.data.map(function(el) {
     return el.name; 
}) // stringArr is now an array that would contain the names.

有关Array.map()的信息，请单击here。

希望这会有所帮助。

Answer 3

这很容易，您可以像这样检索所需的输出

符号{,}表示json对象，[,]表示json数组

      //Here i first take json object from your string

        JSONObject jsonObject = new JSONObject(your_json_respons_string);

      // now the json object have json array so we will take array

        JSONArray jsonArray = jsonObject.getJSONArray("data");

//each json array have one name so definitely our array size going to be jsonArray.length()

        String[] strings = new String[jsonArray.length()];


        for (int i = 0; i < jsonArray.length(); i++) {

      //taking json object and the name values and then putting in array

            JSONObject jsonObject1 = jsonArray.getJSONObject(i);
            strings[i] = jsonObject1.getString("name");


        }

如何从JSON对象中的数组获取字符串

3 个答案: