如何使用 Java 在屏幕上打印 JSON 文件的值？

Question

I recently started using the OKHttp library to make requests to an API, this is the code:

public static void main(String[] args) throws IOException {
    OkHttpClient client = new OkHttpClient();

    Request request = new Request.Builder()
        .url("https://api-football-v1.p.rapidapi.com/v2/players/player/874")
        .get()
        .addHeader("x-rapidapi-host", "api-football-v1.p.rapidapi.com")
        .addHeader("x-rapidapi-key", "6147bd5da4mshfacf56a7067aa5ep1ff9e6jsn60984dedb281")
        .build();

    okhttp3.Response response = client.newCall(request).execute();
}

Now, I would like to know how to print the value that has the string "firstname" as the "key".

Answer 1

JSONObject responseJson = new JSONObject(response); String firstname = responseJson .get("firstname").toString();

I think this should work for you.

Answer 2

You should get the String from Response :

String stringResponse = response.body().string();

Then you have to parse the JSON contained in the String. For this, you can use org.json :

JSONObject jsonResponse = new JSONObject(stringResponse);
String firstName = jsonResponse.getString("firstName");

Or maybe use Jackson to parse JSON if you can map your JSON to an class you have.