JavaFX integration with Spring rest client

Question

i have implemented Java Spring Rest client application, each rest am geting input xml file , and taxking that file according file values am select jsp file showing in Javafx Webview, once ur transaction completed i need to close that webview window. send back result as rest clinet response. for every request i need to open javafx webview winodow and process it.

but here am faceing onec issues.

Rest cleint Call

static String url ="http://localhost:8080/login.jsp?value=47&key=645";
    javafx.application.Application.launch(Webview.class);

Webview class

public class Webview extends Application {

    public static Stage stage;
    public static WebView view;

    @Override
    public void start(Stage _stage) throws Exception {
        System.out.println("Start");
        stage = _stage;
        Platform.setImplicitExit(true);
        StackPane root = new StackPane();

        view = new WebView();

        WebEngine engine = view.getEngine();
        engine.load(PaymentServerRestAPI.BROWSER_URL);
        root.getChildren().add(view);
        engine.setJavaScriptEnabled(true);
        Scene scene = new Scene(root, 800, 600);
        stage.setScene(scene);



        stage.setOnCloseRequest(new EventHandler<WindowEvent>() {

            @Override
            public void handle(WindowEvent arg0) {

                Platform.exit();
            }
        });

        JSObject window = (JSObject) engine.executeScript("window");
        window.setMember("app", new BrowserApp());

        stage.show();

    }

}

//JavaScript interface object

public class BrowserApp {



    public void exit() {
        System.out.println("exist calling button");
        Browser.frame.setVisible(false);
    }
}

problem is one request successful completed next request am getting "ERROR IN MAIN:java.lang.IllegalStateException: Application launch must not be called more than once". how to handle this. any other way to handle this problem ,thanks