Model view controller JavaFx-8（连接到登录屏幕的主屏幕）的事件处理帮助可以'；I don’我不能回家上班

您好，我已经设计并编程了游戏，我几乎完成了。我只是在连接我的模型和动作事件时遇到了一个小问题

1） 我无法使我的动作事件方法与主页上的退出或关闭按钮协调。 2） 我只是尝试连接模型中的方法，以连接控制器中的动作事件。 3） 我只需要一个简单的例子说明我做错了什么

这是我的登录控制器：

 @FXML
private void handleButtonAction(ActionEvent event) throws IOException {


    System.out.println("Login Now");
    Parent home_page_parent = FXMLLoader.load(getClass().getResource("FXMLHomePage.fxml"));
    Scene home_page_scene = new Scene(home_page_parent);
    String css = BlackJackFx.class.getResource("view/homePage.css").toExternalForm();
    home_page_scene.getStylesheets().add(css);
    Stage app_stage = (Stage) ((Node) event.getSource()).getScene().getWindow();

    if (isValidCredentials())
        {
           app_stage.hide();
           app_stage.setScene(home_page_scene);
           app_stage.show();
        }
    else
        {
          username_box.clear();
          password_box.clear();
          invalid_label.setText("Invalid Username or Password! ");
        }

}

private boolean isValidCredentials()
{
    boolean let_in = false;
    System.out.println("SELECT * FROM Users WHERE USERNAME= " + "'" + username_box.getText() + "'"
        + "AND PASSWORD= " + "'" + password_box.getText() + "'");

    Connection c = null;
    java.sql.Statement stmt = null;
    try{
        c = DriverManager.getConnection("jdbc:sqlite:BjFx.db");
        c.setAutoCommit(false);

        System.out.println("Opened database successfully");
        stmt = c.createStatement();

         ResultSet rs = stmt.executeQuery( "SELECT * FROM Users WHERE USERNAME= " + "'" + username_box.getText() + "'"
        + " AND PASSWORD= " + "'" + password_box.getText() + "'");

        while ( rs.next() ) {
             if (rs.getString("USERNAME") != null && rs.getString("PASSWORD") != null) { 
                 String  username = rs.getString("USERNAME");
                 System.out.println( "USERNAME = " + username );
                 String password = rs.getString("PASSWORD");
                 System.out.println("PASSWORD = " + password);
                 let_in = true;
            }
        }
        rs.close();
        stmt.close();
        c.close();
        } catch ( Exception e ) {
            System.err.println( e.getClass().getName() + ": " + e.getMessage() );
            System.exit(0);
        }
        System.out.println("isValidCredentials Operation done successfully");
        return let_in;

}      

@Override
public void initialize(URL url, ResourceBundle rb) {
    // TODO
}

}

public class FXMLHomePageController implements Initializable {

  @FXML
  private Button newGameBtn;

  @FXML
  private Button stayBtn;

  @FXML
  private Button hitBtn;

  @FXML
  private Button dblDownBtn;

  @FXML
  private Button tenBetBtn;

  @FXML
  private Button fiftyBetBtn;

  @FXML
  private Button houndredBetBtn;


  @FXML 
  private Button quitBtn;  

  @Override
   public void initialize(URL url, ResourceBundle rb) {


   }

@FXML
public void quitBtnAction(ActionEvent event) {
Stage stage = (Stage) quitBtn.getScene().getWindow();
stage.close();
}

@FXML
public void newGameBtnAction(ActionEvent event) {
}
@FXML
public void stayBtnAction(ActionEvent event) {

}

@FXML
public void hitBtnAction(ActionEvent event) {

}
@FXML
public void dblDownBtnAction(ActionEvent event) {

}
@FXML
public void tenBtnAction(ActionEvent event) {

}
@FXML
public void fiftyBtnAction(ActionEvent event) {

}
@FXML
public void houndredBtnAction(ActionEvent event) {

}


}

和我的主页控制器：

 @FXML
private void handleButtonAction(ActionEvent event) throws IOException {


    System.out.println("Login Now");
    Parent home_page_parent = FXMLLoader.load(getClass().getResource("FXMLHomePage.fxml"));
    Scene home_page_scene = new Scene(home_page_parent);
    String css = BlackJackFx.class.getResource("view/homePage.css").toExternalForm();
    home_page_scene.getStylesheets().add(css);
    Stage app_stage = (Stage) ((Node) event.getSource()).getScene().getWindow();

    if (isValidCredentials())
        {
           app_stage.hide();
           app_stage.setScene(home_page_scene);
           app_stage.show();
        }
    else
        {
          username_box.clear();
          password_box.clear();
          invalid_label.setText("Invalid Username or Password! ");
        }

}

private boolean isValidCredentials()
{
    boolean let_in = false;
    System.out.println("SELECT * FROM Users WHERE USERNAME= " + "'" + username_box.getText() + "'"
        + "AND PASSWORD= " + "'" + password_box.getText() + "'");

    Connection c = null;
    java.sql.Statement stmt = null;
    try{
        c = DriverManager.getConnection("jdbc:sqlite:BjFx.db");
        c.setAutoCommit(false);

        System.out.println("Opened database successfully");
        stmt = c.createStatement();

         ResultSet rs = stmt.executeQuery( "SELECT * FROM Users WHERE USERNAME= " + "'" + username_box.getText() + "'"
        + " AND PASSWORD= " + "'" + password_box.getText() + "'");

        while ( rs.next() ) {
             if (rs.getString("USERNAME") != null && rs.getString("PASSWORD") != null) { 
                 String  username = rs.getString("USERNAME");
                 System.out.println( "USERNAME = " + username );
                 String password = rs.getString("PASSWORD");
                 System.out.println("PASSWORD = " + password);
                 let_in = true;
            }
        }
        rs.close();
        stmt.close();
        c.close();
        } catch ( Exception e ) {
            System.err.println( e.getClass().getName() + ": " + e.getMessage() );
            System.exit(0);
        }
        System.out.println("isValidCredentials Operation done successfully");
        return let_in;

}      

@Override
public void initialize(URL url, ResourceBundle rb) {
    // TODO
}

}

public class FXMLHomePageController implements Initializable {

  @FXML
  private Button newGameBtn;

  @FXML
  private Button stayBtn;

  @FXML
  private Button hitBtn;

  @FXML
  private Button dblDownBtn;

  @FXML
  private Button tenBetBtn;

  @FXML
  private Button fiftyBetBtn;

  @FXML
  private Button houndredBetBtn;


  @FXML 
  private Button quitBtn;  

  @Override
   public void initialize(URL url, ResourceBundle rb) {


   }

@FXML
public void quitBtnAction(ActionEvent event) {
Stage stage = (Stage) quitBtn.getScene().getWindow();
stage.close();
}

@FXML
public void newGameBtnAction(ActionEvent event) {
}
@FXML
public void stayBtnAction(ActionEvent event) {

}

@FXML
public void hitBtnAction(ActionEvent event) {

}
@FXML
public void dblDownBtnAction(ActionEvent event) {

}
@FXML
public void tenBtnAction(ActionEvent event) {

}
@FXML
public void fiftyBtnAction(ActionEvent event) {

}
@FXML
public void houndredBtnAction(ActionEvent event) {

}


}

---

我在这里遗漏了什么？

那么当你按下

quitBtn

时会发生什么呢？@James\u绝对没有什么。我点击它，没有任何行动。我知道这可能是最小的事情，但我越早能弄明白这一点，我就越早能将我的模型添加到我其余的动作事件方法中……显示相关的FXML@James_D我知道我会在早上醒来，意识到这个问题，整天都觉得自己很笨。。。。这是学习编程的唯一部分，我讨厌。。。