无法重定向到其他FXML

无法重定向到其他FXML

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无法重定向到其他FXML

本文介绍了无法重定向到其他FXML的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

Plop，

我在这里是因为我需要帮助，我完全迷路了，我已经尝试了很多次，但仍然遇到此错误.

Me here because i need help, i'm totally lost, i've tried many times but still got this error.

我试图在用户单击按钮时将登录页面上的用户重定向到登录页面.

Me trying to redirect the user on a login page to a signin page when he click on a button.

我遇到错误():

Exception in thread "JavaFX Application Thread" java.lang.IllegalArgumentException: argument type mismatch
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at com.sun.javafx.reflect.Trampoline.invoke(MethodUtil.java:76)
    at jdk.internal.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at javafx.base/com.sun.javafx.reflect.MethodUtil.invoke(MethodUtil.java:275)
    at javafx.fxml/com.sun.javafx.fxml.MethodHelper.invoke(MethodHelper.java:83)
    at javafx.fxml/javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1782)
    at javafx.fxml/javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1670)
    at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
    at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
    at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
    at javafx.base/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
    at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
    at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at javafx.base/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
    at javafx.base/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
    at javafx.base/javafx.event.Event.fireEvent(Event.java:198)
    at javafx.graphics/javafx.scene.Node.fireEvent(Node.java:8865)
    at javafx.controls/javafx.scene.control.Button.fire(Button.java:200)
    at javafx.controls/com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:206)
    at javafx.controls/com.sun.javafx.scene.control.inputmap.InputMap.handle(InputMap.java:274)
    at javafx.base/com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
    at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
    at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
    at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
    at javafx.base/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
    at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
    at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
    at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
    at javafx.base/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
    at javafx.base/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
    at javafx.base/javafx.event.Event.fireEvent(Event.java:198)
    at javafx.graphics/javafx.scene.Scene$MouseHandler.process(Scene.java:3876)
    at javafx.graphics/javafx.scene.Scene$MouseHandler.access$1300(Scene.java:3604)
    at javafx.graphics/javafx.scene.Scene.processMouseEvent(Scene.java:1874)
    at javafx.graphics/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2613)
    at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:397)
    at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
    at java.base/java.security.AccessController.doPrivileged(Native Method)
    at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:434)
    at javafx.graphics/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:395)
    at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:433)
    at javafx.graphics/com.sun.glass.ui.View.handleMouseEvent(View.java:556)
    at javafx.graphics/com.sun.glass.ui.View.notifyMouse(View.java:942)
    at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:175)
    at java.base/java.lang.Thread.run(Thread.java:834)

我尝试从(Login.fxml)重定向用户:

Me try to redirect the user from (Login.fxml): 

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Hyperlink?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.PasswordField?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.effect.Glow?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.text.Font?>
<?import javafx.scene.text.Text?>

<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="500.0" prefWidth="700.0" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="packages.home.Controller">
   <left>
      <AnchorPane prefHeight="500.0" prefWidth="346.0" style="-fx-background-color: #00a8cc;" BorderPane.alignment="CENTER">
         <children>
            <Text fill="#f5f5f5" layoutX="137.0" layoutY="218.0" strokeType="OUTSIDE" strokeWidth="0.0" text="MY FIT">
               <font>
                  <Font size="39.0" />
               </font>
            </Text>
            <Text fill="#f5f5f5" layoutX="44.0" layoutY="256.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Gérer vos séances sportives et plus encore" wrappingWidth="347.3798828125">
               <font>
                  <Font size="15.0" />
               </font>
            </Text>
            <Button fx:id="btnCreate" layoutX="140.0" layoutY="314.0" mnemonicParsing="false" onAction="#handleButtonAction" onMouseClicked="#handleButtonAction" prefHeight="33.0" prefWidth="111.0" style="-fx-background-color: #ffff;" text="Se connecter" textFill="#00a8cc">
               <effect>
                  <Glow />
               </effect></Button>
         </children>
      </AnchorPane>
   </left>
   <right>
      <AnchorPane prefHeight="500.0" prefWidth="356.0" BorderPane.alignment="CENTER">
         <children>
            <TextField fx:id="txtUsername" layoutX="84.0" layoutY="175.0" prefHeight="37.0" prefWidth="158.0" promptText="Nom d'utilisateur" />
            <PasswordField fx:id="txtPassword" layoutX="84.0" layoutY="239.0" prefHeight="39.0" prefWidth="158.0" promptText="Mot de passe" />
            <Button fx:id="btnConnect" layoutX="108.0" layoutY="313.0" mnemonicParsing="false" onMouseClicked="#handleButtonAction" prefHeight="33.0" prefWidth="111.0" style="-fx-background-color: #00a8cc;" text="Se connecter" textFill="WHITE">
               <effect>
                  <Glow />
               </effect></Button>
            <Hyperlink layoutX="48.0" layoutY="452.0" text="Vous avez oubliez votre mot de passe ?" />
            <Text fill="#00a8cc" layoutX="72.0" layoutY="121.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Authentification">
               <font>
                  <Font size="24.0" />
               </font>
            </Text>
            <Button fx:id="btnClose" layoutX="257.0" layoutY="-1.0" minWidth="49.0" mnemonicParsing="false" onMouseClicked="#handleButtonAction" prefHeight="30.0" prefWidth="60.0" style="-fx-background-color: #00a8cc;" text="Quitter" textFill="WHITE" />
            <Label fx:id="lblErrors" layoutX="87.0" layoutY="278.0" prefHeight="23.0" prefWidth="154.0" textFill="#dd1717" />
         </children>
      </AnchorPane>
   </right>
</BorderPane>

主控制器(我在handleButtonAction中重定向用户-btnCreate):

Main Controller (me redirecting the user in handleButtonAction - btnCreate) :

package packages.home;

import javafx.application.Application;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.TextField;
import javafx.scene.control.Label;
import javafx.scene.control.Button;
import static javax.swing.JOptionPane.showMessageDialog;
import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.AnchorPane;
import javafx.scene.paint.Color;
import javafx.stage.Modality;
import javafx.stage.Stage;
import javafx.stage.StageStyle;

public class Controller extends Application {

    @FXML
    private Button btnClose;

    @FXML
    private TextField txtUsername;

    @FXML
    private TextField txtPassword;

    @FXML
    private Label lblErrors;

    @FXML
    private Button btnConnect;

    @FXML
    private Button btnCreate;

    /// --
    Connection laConnection = GestionConnection.getLaConnection();
    PreparedStatement preparedStatement = null;
    ResultSet resultSet = null;


    public void handleButtonAction(MouseEvent event) throws IOException{

        if (event.getSource() == btnClose) {
            System.exit(0);
            System.out.println("Fermeture de l'application.");
        }

        if (event.getSource() == btnConnect) {

            //login here
            if (logIn().equals("Success")) {

                // On affiche une nouvelle scene
                try {
                    FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("dashboard.fxml"));
                    Parent root1 = (Parent) fxmlLoader.load();
                    Stage stage = new Stage();
                    stage.initModality(Modality.APPLICATION_MODAL);
                    stage.initStyle(StageStyle.UNDECORATED);
                    stage.setTitle("MyFit - Mon Dashboard");
                    stage.setScene(new Scene(root1));
                    stage.show();
                } catch (Exception e){
                    System.out.println(e);

                }

                //add you loading or delays - ;-)
                Node node = (Node) event.getSource();
                Stage stage = (Stage) node.getScene().getWindow();

                //stage.setMaximized(true);
                stage.close();


            }
        }

        if (event.getSource() == btnCreate) {

            // On affiche une nouvelle scene
            try {
                FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("Create.fxml"));
                Parent root1 = (Parent) fxmlLoader.load();
                Stage stage = new Stage();
                stage.initModality(Modality.APPLICATION_MODAL);
                stage.initStyle(StageStyle.UNDECORATED);
                stage.setTitle("MyFit - Inscription");
                stage.setScene(new Scene(root1));
                stage.show();
            } catch (Exception e){
                System.out.println(e);

            }

            //add you loading or delays - ;-)
            Node node = (Node) event.getSource();
            Stage stage = (Stage) node.getScene().getWindow();

            //stage.setMaximized(true);
            stage.close();




            }


    }



    private String logIn() {

        String status = "Success";
        String username = txtUsername.getText();
        String password = txtPassword.getText();

        if(username.isEmpty() || password.isEmpty()) {

            setLblErrors(Color.RED, "Champs vides.");
            status = "Error";

        } else {

            //query
            String sql = "SELECT * FROM admins Where username = ? and password = ?";

            try {

                // On test la requête
                System.out.println("Hello");
                preparedStatement = laConnection.prepareStatement(sql);
                preparedStatement.setString(1, username);
                preparedStatement.setString(2, password);
                resultSet = preparedStatement.executeQuery();

                if (!resultSet.next()) {
                    setLblErrors(Color.TOMATO, "Nom d'utilisateur ou mot de passe incorrect");
                    status = "Error";

                } else {
                    setLblErrors(Color.GREEN, "Authentification réussite, redirection en cours ...");
                    showMessageDialog(null, "Vous êtes bien connecté");

                }

            } catch (SQLException ex) {

                System.err.println(ex.getMessage());
                status = "Exception";
            }
        }
        return status;

    }


    private void setLblErrors(Color color, String text) {
        lblErrors.setTextFill(color);
        lblErrors.setText(text);
        System.out.println(text);
    }


    @Override
    public void start(Stage stage) throws Exception {

    }
}

我尝试打印此fxml:'(:

Me try to print this fxml :'( :

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.CheckBox?>
<?import javafx.scene.control.DatePicker?>
<?import javafx.scene.control.PasswordField?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.effect.Glow?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.Font?>
<?import javafx.scene.text.Text?>

<AnchorPane prefHeight="500.0" prefWidth="700.0" style="-fx-background-color: #00a8cc;" xmlns="http://javafx.com/javafx/11.0.1" xmlns:fx="http://javafx.com/fxml/1" fx:controller="packages.home.CreateController">
   <children>
      <AnchorPane layoutX="234.0" layoutY="14.0" prefHeight="56.0" prefWidth="243.0" style="-fx-background-color: #ffff;">
         <children>
            <Text fill="#00a8cc" layoutX="66.0" layoutY="37.0" strokeType="OUTSIDE" strokeWidth="0.0" text="Inscription">
               <font>
                  <Font size="24.0" />
               </font>
            </Text>
         </children>
      </AnchorPane>
      <AnchorPane layoutX="5.0" layoutY="393.0" prefHeight="107.0" prefWidth="700.0">
         <children>
            <CheckBox accessibleRoleDescription="ndr" layoutX="385.0" layoutY="45.0" mnemonicParsing="false" text="Confirmer l'inscription." textFill="WHITE" />
            <Button fx:id="btnCreate1" layoutX="216.0" layoutY="35.0" mnemonicParsing="false" prefHeight="32.0" prefWidth="134.0" style="-fx-background-color: #d63447;" text="Rejoindre MyFit" textFill="WHITE">
               <effect>
                  <Glow />
               </effect>
               <font>
                  <Font size="16.0" />
               </font>
            </Button>
         </children>
      </AnchorPane>
      <AnchorPane layoutX="154.0" layoutY="178.0" prefHeight="72.0" prefWidth="455.0">
         <children>
            <TextField layoutX="-29.0" layoutY="19.0" prefHeight="35.0" prefWidth="442.0" promptText="E-mail" />
         </children>
      </AnchorPane>
      <TextField layoutX="125.0" layoutY="134.0" prefHeight="35.0" prefWidth="167.0" promptText="Nom d'utilisateur" />
      <TextField layoutX="394.0" layoutY="134.0" prefHeight="35.0" prefWidth="173.0" promptText="Nom" />
      <TextField layoutX="393.0" layoutY="267.0" prefHeight="35.0" prefWidth="122.0" promptText="Pays" />
      <DatePicker layoutX="125.0" layoutY="267.0" prefHeight="35.0" prefWidth="147.0" promptText="Date de naissance" />
      <TextField layoutX="126.0" layoutY="346.0" prefHeight="35.0" prefWidth="173.0" promptText="Nom d'utilisateur " />
      <PasswordField layoutX="393.0" layoutY="346.0" prefHeight="35.0" prefWidth="173.0" promptText="Mot de passe" />
   </children>
</AnchorPane>

CreateController:

CreateController:

package packages.home;

import javafx.application.Application;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.*;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;

import java.net.URL;
import java.util.ResourceBundle;

public class CreateController implements Initializable {

private final AnchorPane rootPane;

    @FXML
    private TextField txtName;

    @FXML
    private TextField txtFirstname;

    @FXML
    private TextField txtEmail;

    @FXML
    private TextField txtCountry;

    @FXML
    private TextField txtUsername;

    @FXML
    private PasswordField txtPassword;

    @FXML
    private DatePicker datePicker;

    @FXML
    private CheckBox checkBox;

    @FXML
    private Button btnCreate1;

    public CreateController(AnchorPane rootPane) {
this.rootPane = rootPane
    }

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

    }
}

我是Java和JavaFX的新手，我相信它有很多可能.

Me a student new to Java and JavaFX and i'm sure it have a lot of possibilies.

如果您对此主题有任何疑问，请随时回答.

If you have any questions regarding this subject feel free to answer.

在此先感谢您的帮助，非常感谢.

Me thanks in advance for your help, me really appreciate.

推荐答案

在"Login.fxml" FXML文件中，您具有以下按钮:

Inside your "Login.fxml" FXML file, you have this button:

<Button fx:id="btnCreate" layoutX="140.0" layoutY="314.0" mnemonicParsing="false"
        onAction="#handleButtonAction" onMouseClicked="#handleButtonAction"
        prefHeight="33.0" prefWidth="111.0"
        style="-fx-background-color: #ffff;" text="Se connecter" textFill="#00a8cc">

请注意，您同时定义了onAction 和 onMouseClicked来调用相同的方法.而在Controller中，您有:

Notice you defined both onAction and onMouseClicked to invoke the same method. Yet in Controller you have:

public void handleButtonAction(MouseEvent event) throws IOException {
    // method body omitted for brevity
}

这行不通. onAction期望ActionEvent，而onMouseClicked期望MouseEvent.您需要:

This won't work. The onAction expects an ActionEvent and the onMouseClicked expects a MouseEvent. You need to either:

  1. 错误::将参数类型更改为ActionEvent和MouseEvent的超类型(例如Event).

  2. 好:从FXML中的按钮元素中删除onAction或onMouseClicked.最好将后者删除，因为onAction处理程序是与按钮进行交互时执行某些操作的正确方法.

  1. Bad: Change the parameter type to a supertype of both ActionEvent and MouseEvent (e.g. Event).

  2. Good: Remove either onAction or onMouseClicked from the button element in the FXML. Preferably you'd remove the latter as the onAction handler is the proper way to do something when a button is interacted with.

如果保留onAction，则需要从MouseEvent更改为ActionEvent.

If you keep onAction then you need to change from MouseEvent to ActionEvent.

到目前为止，选项二是最好的选择.保留两个处理程序将导致该方法被调用两次.

Option two is by far the best option. Keeping both handlers will cause the method to be invoked twice.

您的CreateController也将有问题.当您使用fx:controller定义控制器时，并且不使用自定义控制器工厂时，FXMLLoader会尝试通过no-arg构造函数以反射方式创建控制器.由于CreateController没有no-arg构造函数，这将导致引发异常(我相信特别是NoSuchMethodException).

You will also have a problem with your CreateController. When you define a controller with fx:controller, and don't use a custom controller factory, the FXMLLoader attempts to reflectively create the controller via the no-arg constructor. Since CreateController does not have a no-arg constructor this will cause an exception to be thrown (specifically a NoSuchMethodException, I believe).

至少有三种可能的解决方案:

There are at least three possible solutions:

  1. 从FXML文件中删除fx:controller并手动设置控制器实例:

  1. Remove fx:controller from the FXML file and manually set the controller instance:

FXMLLoader loader = new FXMLLoader();
loader.setController(new CreateController(/* AnchorPane instance */));
// invoke #load() **after** setting the controller

  • 将fx:controller保留在FXML中并设置自定义控制器工厂:

  • Keep the fx:controller in the FXML and set a custom controller factory:

    FXMLLoader loader = new FXMLLoader();
loader.setControllerFactory(clazz -> {
  if (clazz == CreateController.class) {
    return new CreateController(/* AnchorPane instance */);
  }
  throw new UnsupportedOperationException();
});
// invoke #load() **after** setting the controller factory

  • 保留fx:controller，在CreateController中使用no-arg构造函数，并在事实之后添加一种传递AnchorPane的方法:

  • Keep the fx:controller, use a no-arg constructor in CreateController, and add a way to pass the AnchorPane after the fact:

    FXMLLoader loader = new FXMLLoader();
// configure loader...
loader.load();
// must invoke #load() **before** getting the controller instance
loader.<CreateController>getController().setAnchorPane(/* AnchorPane insatnce */);

    在这种情况下，最好摆脱CreateController中的构造函数，因为它不再执行任何操作.如果未声明构造函数，则编译器将添加隐式的无参数默认构造函数".

    In this case, it's best to just get rid of the constructor in CreateController since it no longer does anything. If no constructor is declared then an implicit no-arg "default constructor" is added by the compiler.

    这篇关于无法重定向到其他FXML的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

    • 08-21 11:13
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