将 FXML 加载到 borderpane 中心

Question

大家晚上好，

我正在玩 JavaFX。目的是在单击按钮时将准备好的 fxml 加载到边框的中心元素中。不幸的是，我收到以下错误：

Caused by: javafx.fxml.LoadException: 
/D:/Coden/Eclipse%20Workspace/Project%20Tango001/bin/application/Page1Gui.fxml:8

 at javafx.fxml.FXMLLoader.constructLoadException(Unknown Source)
 at javafx.fxml.FXMLLoader.access0(Unknown Source)
 at javafx.fxml.FXMLLoader$ValueElement.processAttribute(Unknown Source)
 at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(Unknown Source)
 at javafx.fxml.FXMLLoader$Element.processStartElement(Unknown Source)
 at javafx.fxml.FXMLLoader$ValueElement.processStartElement(Unknown Source)
 at javafx.fxml.FXMLLoader.processStartElement(Unknown Source)
 at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
 at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
 at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
 at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
 at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
 at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
 at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
 at javafx.fxml.FXMLLoader.load(Unknown Source)
 at application.MainGUIController.LadeCenterNeu(MainGUIController.java:19)
 ... 57 more
Caused by: java.lang.ClassNotFoundException: Page1GUIController.java
 at java.net.URLClassLoader.run(Unknown Source)
 at java.net.URLClassLoader.run(Unknown Source)
 at java.security.AccessController.doPrivileged(Native Method)
 at java.net.URLClassLoader.findClass(Unknown Source)
 at java.lang.ClassLoader.loadClass(Unknown Source)
 at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
 at java.lang.ClassLoader.loadClass(Unknown Source)
 ... 71 more

请找到我的简单代码如下：

Main.java:

//*** Main.java

package application;
 
import javafx.application.Application;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.fxml.FXMLLoader;


public class Main extends Application {
 @Override
 public void start(Stage primaryStage) {
  try {
   BorderPane root = (BorderPane)FXMLLoader.load(getClass().getResource("MainGUI.fxml"));
   Scene scene = new Scene(root,400,400);
   scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
   primaryStage.setScene(scene);
   primaryStage.show();
  } catch(Exception e) {
   e.printStackTrace();
  }
 }
 
 public static void main(String[] args) {
  launch(args);
 }
}

MainGui.fxml:

//*** MainGui.fxml

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

<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.BorderPane?>

<BorderPane id="maincontent" fx:id="maincontent" maxHeight="344.0" maxWidth="600.0" minHeight="344.0" minWidth="600.0" prefHeight="344.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.MainGUIController">
   <top>
      <Pane prefHeight="72.0" prefWidth="600.0" style="-fx-background-color: #00567F;" BorderPane.alignment="CENTER">
         <children>
            <Button layoutX="274.0" layoutY="24.0" mnemonicParsing="false" onAction="#LadeCenterNeu" text="Button" />
         </children></Pane>
   </top>
   <left>
      <Pane prefHeight="200.0" prefWidth="98.0" style="-fx-background-color: #33677F;" BorderPane.alignment="CENTER" />
   </left>
   <center>
      <Pane id="MainGUICenter" prefHeight="200.0" prefWidth="200.0" style="-fx-background-color: #4CC5FF;" BorderPane.alignment="CENTER">
         <children>
            <Label layoutX="169.0" layoutY="92.0" text="Initialer Inhalt" textAlignment="CENTER" />
         </children>
      </Pane>
   </center>
   <right>
      <Pane prefHeight="200.0" prefWidth="92.0" style="-fx-background-color: #33677F;" BorderPane.alignment="CENTER" />
   </right>
   <bottom>
      <Pane prefHeight="72.0" prefWidth="600.0" style="-fx-background-color: #00567F;" BorderPane.alignment="CENTER" />
   </bottom>
</BorderPane>

MainGuiController.java:

//*** MainGuiController.java

package application;

import java.io.IOException;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.layout.Pane;


public class MainGUIController {
 
 @FXML
 Pane maincontent;
 
 @FXML
 private void LadeCenterNeu(ActionEvent event) throws IOException {
  maincontent.getChildren().clear();
  maincontent.getChildren().add(FXMLLoader.load(getClass().getResource("Page1Gui.fxml")));
  System.out.println("Load!");
 }
 
}

Page1Gui.fxml:

//*** Page1Gui.fxml

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

<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane prefHeight="425.0" prefWidth="545.0" style="-fx-background-color: #111111;" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Page1GUIController.java">
   <children>
      <Pane layoutX="-169.0" layoutY="-176.0" prefHeight="200.0" prefWidth="200.0" />
      <Label layoutX="259.0" layoutY="204.0" text="Inhalt 2" />
   </children>
</AnchorPane>

Page1GuiController.java:

package application;

public class Page1GUIController {

}

非常感谢您的帮助！

Answer 1

fx:controller 属性需要完全限定的 class 名称。 IE。在 Page1GUI.fxml 你需要 fx:controller="application.Page1GUIController"

（注意：我没有仔细阅读您的所有代码：可能还有其他错误。但这就是您发布错误的原因。）

Answer 2

好吧，

我终于成功了;-)

以下代码让我很开心：

public void LoadDashboardFXML(ActionEvent event) throws IOException
{
    StackPaneMain.getChildren().clear();
    StackPaneMain.getChildren().add(FXMLLoader.load(getClass().getResource("Dashboard.fxml")));
    StackPaneMain.setLayoutX(0);
    StackPaneMain.setLayoutY(0);
}

我只是添加了

@FXML
StackPane StackPaneMain;

在 Main.java (fx:id) 的控制器 class 中。

现在，首先清除 StackPane，然后加载 fxml。

Answer 3

这将帮助其他人。如果您想在边框窗格的中央加载 fxm

FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("prepared.fxml"));
        borderPane.getChildren().remove(borderPane.getCenter()); //remove existing fxml from center.
        try {
            borderPane.setCenter(fxmlLoader.load());
        } catch (IOException e) {
            e.printStackTrace();
        }

将 FXML 加载到 borderpane 中心

Loading a FXML into borderpane center

javafx

center

fxml

borderpane