javafx.fxml.LoadException：解决onAction ='＃exitApplication'时出错，不在命名空间中，或者脚本中有错误？

问题描述

因此，我收到下面列出的异常，但我不明白为什么。我使用@FXML批注，并且该方法与操作具有相同的名称。我是JavaFX的新手，但我不明白什么是名称空间？ Java具有包和类，我认为名称空间作为一种语法概念在C ++中是必需的。我也没有在FXML文件中使用脚本吗？

例外

javafx.fxml.LoadException: Error resolving onAction='#exitApplication',either the event handler is not in the Namespace or there is an error in the script.
/C:/Users/noahb/OneDrive/Documents/Eclipse/general/JavaFX%20Practice%201/bin/application/application.fxml:8
    at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2597)
    at javafx.fxml.FXMLLoader.access$100(FXMLLoader.java:103)
    at javafx.fxml.FXMLLoader$Element.processEventHandlerAttributes(FXMLLoader.java:610)
    at javafx.fxml.FXMLLoader$ValueElement.processEndElement(FXMLLoader.java:770)
    at javafx.fxml.FXMLLoader.processEndElement(FXMLLoader.java:2823)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2532)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3214)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
    at application.Main.start(Main.java:16)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$8(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$7(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$5(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$6(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$4(WinApplication.java:186)
    at java.lang.Thread.run(Unknown Source)

Main.java

    
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.stage.Stage;
//import javafx.stage.StageStyle;
import javafx.scene.Parent;
import javafx.scene.Scene;

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

Controller.java

package application;

import javafx.event.ActionEvent;
import javafx.fxml.FXML;

public class Controller {
    @FXML
    private static void exitApplication(ActionEvent event) {
        event.consume();
        System.exit(0);
    }
}

application.fxml

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

<?import javafx.scene.control.Button?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="710.0" stylesheets="@application.css" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" fx:controller="application.Controller">
    <Button layoutX="329.0" layoutY="188.0" mnemonicParsing="false" onAction="#exitApplication" text="Exit" />
</AnchorPane>

文件结构

解决方法

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