阅读Fortnite Json API

因此，每次尝试将文件下载到本地计算机时，我都尝试从网站（fortniteapi.com）中读取JSON文件。我已经在这里待了大约一个星期，我只是想不通为什么它不起作用。

我也在用格森

到目前为止，这是我的代码：

package sample;

import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.*;
import java.net.URL;
import java.net.URLConnection;

public class Main extends Application {

@Override
public void start(Stage primaryStage) throws Exception{
    Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
    primaryStage.setTitle("Fortnite");
    primaryStage.setScene(new Scene(root, 300, 275));
    primaryStage.show();
    ReadJson();
}


public static void main(String[] args) {
    launch(args);
}

public void  ReadJson()
{
    try {
        // read url
        String sURL = "https://fortnite-public-api.theapinetwork.com/prod09/users/id?username=Ninja"; //just a string
        // Connect to the URL using java's native library
        URL url = new URL(sURL);
        URLConnection request = url.openConnection();
        request.connect();

        // Convert to a JSON object
        JsonParser jp = new JsonParser(); //from gson
        JsonElement root = jp.parse(new InputStreamReader((InputStream) request.getContent())); //Convert the input stream to a json element
        JsonObject rootobj = root.getAsJsonObject();
        String output = rootobj.get("username").getAsString(); //just grab the username value

        // print out the result/output
        System.out.println(output);

    } catch (IOException e) {
        System.out.println("Unexpected Error.");
       // JOptionPane.showMessageDialog(null, "Oh no something went wrong.", "Unexpected Error", JOptionPane.ERROR_MESSAGE);
        System.exit(1);
    }
}

}