使用MVP模型时在javaFX中切换场景

public class Main extends Application {
    private Stage primaryStage;
    
    @Override
    public void start(Stage primaryStage) throws Exception {
        this.primaryStage = primaryStage;
        
        // 加载初始场景
        FXMLLoader loader = new FXMLLoader(getClass().getResource("main.fxml"));
        Parent root = loader.load();
        
        // 设置场景和控制器
        MainController mainController = loader.getController();
        mainController.setMainApp(this);
        
        // 显示场景
        primaryStage.setScene(new Scene(root));
        primaryStage.show();
    }
    
    // 切换场景的方法
    public void switchScene(String fxmlFile) throws IOException {
        FXMLLoader loader = new FXMLLoader(getClass().getResource(fxmlFile));
        Parent root = loader.load();
        
        // 获取对应的控制器
        BaseController controller = loader.getController();
        controller.setMainApp(this);
        
        // 切换场景
        primaryStage.setScene(new Scene(root));
        primaryStage.show();
    }
    
    public static void main(String[] args) {
        launch(args);
    }
}

public class MainController implements BaseController {
    private Main mainApp;
    
    @FXML
    private void switchToScene2() throws IOException {
        mainApp.switchScene("scene2.fxml");
    }
    
    @Override
    public void setMainApp(Main mainApp) {
        this.mainApp = mainApp;
    }
}