JavaFX - 应用程序 : Only main stage is shown from exported jar file while in Eclipse all dialogs are shown, 为什么会出现这种差异？

Question

我正在尝试在 Windows 上测试我的 JavaFX 桌面应用程序并为其导出一个 jar 文件。我的Eclipse IDE版本:2019-03(4.11.0)

Java Class Controllers and FXML files in same directory

到目前为止，我在 Eclipse 中运行的代码，但是当我运行 jar 文件时，只弹出主阶段，下一个窗口不会显示，并且我在 cmd 上收到几条错误消息。

我尝试使用两个选项创建 jar 文件。从 eclipse 中标准“导出”，然后“JAR 文件”...

jar01

jar02

jar03

jar04

或者使用 Efxclipse - Ant Wizard。

build.fxbuild

两者的结果是相同的......

这是我的主类的摘录，它生成“主阶段”，这是唯一从 jar 运行的阶段:

private static Stage primary;

public void start(Stage primaryStage) {
    try {


        primary = primaryStage;
        primaryStage.setTitle("Unicon Automation Tool");
        primaryStage.setScene(new Scene(root, 278, 143));

        primaryStage.setResizable(false);
        primaryStage.setMaximized(false);

        // primaryStage.resizableProperty().setValue(Boolean.FALSE);
        primaryStage.show();

    } catch (Exception e) {
        e.printStackTrace();
    }
}

这是来自一个 Controller 类的用于后续阶段的一些代码:

private static Stage mainMenu;

private void handleNextAction(ActionEvent event) {

    Window owner = next.getScene().getWindow();

    if (console.isSelected()) {

        Main.goBack();
        Main.setPresentationMode(0);
        Test.test();

    }

    else if (ui.isSelected()) {
        Main.goBack();
        Main.setPresentationMode(1);

        try {
            Parent root = FXMLLoader.load(getClass().getResource("firstMenu.fxml"));

            mainMenu = new Stage();

            mainMenu.setTitle("Unicon Automation Tool");
            mainMenu.setScene(new Scene(root,441, 218));

            //mainMenu.resizableProperty().setValue(Boolean.FALSE);
            mainMenu.setResizable(false);
            mainMenu.setMaximized(false);
            mainMenu.show();


        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }



    }

    else
        AlertHelper.showAlert(Alert.AlertType.ERROR, owner, "Error!", "You must select one of the options!");

}

预期应用程序的窗口会像在 Eclipse IDE 中一样显示，但在我运行 jar 文件后，只出现主阶段，单击“下一步”后，我收到此错误消息:

> Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java
.lang.reflect.InvocationTargetException
        at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1774)
        at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader
.java:1657)
        at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Comp
ositeEventHandler.java:86)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventH
andlerManager.java:238)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventH
andlerManager.java:191)
        at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(C
ompositeEventDispatcher.java:59)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:58)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.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:198)
        at javafx.scene.Node.fireEvent(Node.java:8411)
        at javafx.scene.control.Button.fire(Button.java:185)
        at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(Bu
ttonBehavior.java:182)
        at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorS
kinBase.java:96)
        at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorS
kinBase.java:89)
        at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.h
andleBubblingEvent(CompositeEventHandler.java:218)
        at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Comp
ositeEventHandler.java:80)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventH
andlerManager.java:238)
        at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventH
andlerManager.java:191)
        at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(C
ompositeEventDispatcher.java:59)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:58)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.java:114)
        at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDis
patcher.java:56)
        at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispat
chChainImpl.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:198)
        at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
        at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
        at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
        at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotificatio
n.run(GlassViewEventHandler.java:394)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotificatio
n.run(GlassViewEventHandler.java:295)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEve
nt$358(GlassViewEventHandler.java:432)
        at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(Quantum
Toolkit.java:389)
        at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Glas
sViewEventHandler.java:431)
        at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
        at com.sun.glass.ui.View.notifyMouse(View.java:937)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.lambda$null$152(WinApplication.ja
va:177)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at sun.reflect.misc.Trampoline.invoke(Unknown Source)
        at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at sun.reflect.misc.MethodUtil.invoke(Unknown Source)
        at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
        ... 48 more
Caused by: java.lang.NullPointerException: Location is required.
        at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3207)
        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.MainMenuController.handleNextAction(MainMenuController.ja
va:70)
        ... 58 more

Answer 1

我今天可以测试代码，@helospark 的评论是正确的答案。在匹配源代码中的 .fxml 文件的名称并导出 jar 文件后，应用程序按预期运行。但奇怪的是 Eclipse IDE 对大写“M”不敏感