[当我尝试使用JavaFX场景构建器打开FXML Java文件时，它将运行错误消息[关闭]

Question

[当我尝试使用Java Scene Builder打开fxml文件时，我收到一条消息，指出“无法打开'main.fxml'打开操作失败，请确保所选文件是有效的fxml文档。

（很抱歉，我的一些代码不会在代码部分中找到）但是大多数都可以。

错误消息如下

java.io.IOException: javafx.fxml.LoadException: Unexpected namespace prefix: anttasks. /C:/Users/ababi_000/eclipse-workspace/MediaPlayer2/src/application/main.fxml at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.load(FXOMLoader.java:92) at com.oracle.javafx.scenebuilder.kit.fxom.FXOMDocument.<init>(FXOMDocument.java:80) at com.oracle.javafx.scenebuilder.kit.fxom.FXOMDocument.<init>(FXOMDocument.java:95) at com.oracle.javafx.scenebuilder.kit.editor.EditorController.updateFxomDocument(EditorController.java:2370) at com.oracle.javafx.scenebuilder.kit.editor.EditorController.setFxmlTextAndLocation(EditorController.java:655) at com.oracle.javafx.scenebuilder.app.DocumentWindowController.loadFromFile(DocumentWindowController.java:386) at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.performOpenFiles(SceneBuilderApp.java:579) at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.handleOpenFilesAction(SceneBuilderApp.java:447) at com.oracle.javafx.scenebuilder.app.AppPlatform$MessageBoxDelegate$1.run(AppPlatform.java:189) at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:301) at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:298) at java.security.AccessController.doPrivileged(Native Method) at com.sun.javafx.application.PlatformImpl$6.run(PlatformImpl.java:298) at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95) at com.sun.glass.ui.win.WinApplication._enterNestedEventLoopImpl(Native Method) at com.sun.glass.ui.win.WinApplication._enterNestedEventLoop(WinApplication.java:142) at com.sun.glass.ui.Application.enterNestedEventLoop(Application.java:495) at com.sun.glass.ui.EventLoop.enter(EventLoop.java:107) at com.sun.javafx.tk.quantum.QuantumToolkit.enterNestedEventLoop(QuantumToolkit.java:543) at javafx.stage.Stage.showAndWait(Stage.java:415) at com.oracle.javafx.scenebuilder.kit.editor.panel.util.dialog.AbstractModalDialog.showAndWait(AbstractModalDialog.java:119) at com.oracle.javafx.scenebuilder.kit.editor.panel.util.dialog.ErrorDialog.showDetailsDialog(ErrorDialog.java:100) at com.oracle.javafx.scenebuilder.kit.editor.panel.util.dialog.ErrorDialog.access$000(ErrorDialog.java:43) at com.oracle.javafx.scenebuilder.kit.editor.panel.util.dialog.ErrorDialog$1.run(ErrorDialog.java:58) at com.oracle.javafx.scenebuilder.kit.editor.panel.util.dialog.AlertDialog.actionButtonPressed(AlertDialog.java:108) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71) at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:483) at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275) at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1763) at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1651) at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191) at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74) at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49) at javafx.event.Event.fireEvent(Event.java:204) at javafx.scene.Node.fireEvent(Node.java:8175) at javafx.scene.control.Button.fire(Button.java:185) at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182) at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96) at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89) at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218) at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238) at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191) at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74) at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54) at javafx.event.Event.fireEvent(Event.java:204) at javafx.scene.Scene$MouseHandler.process(Scene.java:3746) at javafx.scene.Scene$MouseHandler.access$1800(Scene.java:3471) at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1695) at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2486) at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:314) at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:243) at java.security.AccessController.doPrivileged(Native Method) at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:345) at com.sun.glass.ui.View.handleMouseEvent(View.java:526) at com.sun.glass.ui.View.notifyMouse(View.java:898) at com.sun.glass.ui.win.WinApplication._enterNestedEventLoopImpl(Native Method) at com.sun.glass.ui.win.WinApplication._enterNestedEventLoop(WinApplication.java:142) at com.sun.glass.ui.Application.enterNestedEventLoop(Application.java:495) at com.sun.glass.ui.EventLoop.enter(EventLoop.java:107) at com.sun.javafx.tk.quantum.QuantumToolkit.enterNestedEventLoop(QuantumToolkit.java:543) at javafx.stage.Stage.showAndWait(Stage.java:415) at com.oracle.javafx.scenebuilder.kit.editor.panel.util.dialog.AbstractModalDialog.showAndWait(AbstractModalDialog.java:119) at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.performOpenFiles(SceneBuilderApp.java:603) at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.handleOpenFilesAction(SceneBuilderApp.java:447) at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.handleLaunch(SceneBuilderApp.java:427) at com.oracle.javafx.scenebuilder.app.AppPlatform.requestStartGeneric(AppPlatform.java:139) at com.oracle.javafx.scenebuilder.app.AppPlatform.requestStart(AppPlatform.java:106) at com.oracle.javafx.scenebuilder.app.SceneBuilderApp.start(SceneBuilderApp.java:371) at com.sun.javafx.application.LauncherImpl$8.run(LauncherImpl.java:837) at com.sun.javafx.application.PlatformImpl$7.run(PlatformImpl.java:335) at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:301) at com.sun.javafx.application.PlatformImpl$6$1.run(PlatformImpl.java:298) at java.security.AccessController.doPrivileged(Native Method) at com.sun.javafx.application.PlatformImpl$6.run(PlatformImpl.java:298) at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95) at com.sun.glass.ui.win.WinApplication._runLoop(Native Method) at com.sun.glass.ui.win.WinApplication.access$300(WinApplication.java:39) at com.sun.glass.ui.win.WinApplication$4$1.run(WinApplication.java:112) at java.lang.Thread.run(Thread.java:744) Caused by: javafx.fxml.LoadException: Unexpected namespace prefix: anttasks. /C:/Users/ababi_000/eclipse-

workspace/MediaPlayer2/src/application/main.fxm 
 lat javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2613)
at javafx.fxml.FXMLLoader.createElement(FXMLLoader.java:2834)
at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2720)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2425)
at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.load(FXOMLoader.java:89)
... 101 more

我的main.fmxl文件代码如下<?xml version="1.0" encoding="UTF-8"?>

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

<AnchorPane xmlns:fx="http://javafx.com/fxml/1">
  <!-- TODO Add Nodes -->
</AnchorPane>

我的main.java代码如下import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;

public class main extends Application {
    @Override
    public void start(Stage primaryStage) {
        try {
            Parent root =
                    FXMLLoader.load(getClass().getResource("/application/main.fxml"));
            Scene scene = new Scene(root );
            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);
    }
}

Answer 1

我不确定发生了什么，我从字面上什么都没改变（只是关闭了日食）。但是它现在正在工作。我有一种预感，因为该程序已经在eclipse的后台运行，所以它不会让我再次运行它。我假设这是因为当我尝试移动Java Scene Builder文件夹时，它不会让我，因为它说它即使未打开也正在运行。我什至关闭了eclipse一段时间，它仍然说Javafx场景构建器正在运行。然后我离开了计算机几个小时，并假设在此时间范围内它停止在后台运行。

[当我尝试使用JavaFX场景构建器打开FXML Java文件时，它将运行错误消息[关闭]

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[当我尝试使用JavaFX场景构建器打开FXML Java文件时，它将运行错误消息[关闭]

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