将 JavaFX 项目导出到 jar。文件。加载 FXML 文件时出错

Question

所以我有这个奇怪的问题。应用程序在 eclipse 项目中工作，但是当我将项目导出到 jar 时。文件并运行它，然后在加载其中一个 fxml 文件时出现 IOexception。

这是一个例外：

javafx.fxml.LoadException: 
com/root/tomaszm/Countdown.fxml

    at javafx.fxml.FXMLLoader.constructLoadException(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.load(Unknown Source)
    at com.controller.tomaszm.WrittenNumbersController.initializeStoperAndCountdown(WrittenNumbersController.java:162)
    at com.controller.tomaszm.WrittenNumbersController.initialize(WrittenNumbersController.java:114)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.loadImpl(Unknown Source)
    at javafx.fxml.FXMLLoader.load(Unknown Source)
    at com.model.tomaszm.ChangeTheRoot.initialize(ChangeTheRoot.java:68)
    at com.controller.tomaszm.MainRootController.fireUpTheFeature(MainRootController.java:103)
    at com.controller.tomaszm.MainRootController.access$0(MainRootController.java:96)
    at com.controller.tomaszm.MainRootController$MouseClickListCell$1.handle(MainRootController.java:147)
    at com.controller.tomaszm.MainRootController$MouseClickListCell$1.handle(MainRootController.java:1)
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
    at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
    at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
    at javafx.event.Event.fireEvent(Unknown Source)
    at javafx.scene.Scene$ClickGenerator.postProcess(Unknown Source)
    at javafx.scene.Scene$ClickGenerator.access$7900(Unknown Source)
    at javafx.scene.Scene$MouseHandler.process(Unknown Source)
    at javafx.scene.Scene$MouseHandler.access$1500(Unknown Source)
    at javafx.scene.Scene.impl_processMouseEvent(Unknown Source)
    at javafx.scene.Scene$ScenePeerListener.mouseEvent(Unknown Source)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Unknown Source)
    at com.sun.glass.ui.View.handleMouseEvent(Unknown Source)
    at com.sun.glass.ui.View.notifyMouse(Unknown Source)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$141(Unknown Source)
    at com.sun.glass.ui.win.WinApplication$$Lambda$38/1657033223.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException
    at com.controller.tomaszm.CountdownController.initialize(CountdownController.java:63)
    ... 46 more

如果您需要一些额外的信息，请告诉我。

编辑： 我发现这是加载source文件夹Files中的字体文件时出现的问题：

try {
            Font registerFont = Font.loadFont(getClass().getClassLoader().getResource("DS-DIGIT.ttf").openStream(), 30);
            labTime.setFont(registerFont);
        } catch (IOException e1) {
            Dialogs.create().title("Exception").masthead(null).message("Couldnt load the font fxml!").showException(e1);
            e1.printStackTrace();
        }

我只是不明白为什么这段代码在项目中工作并在我制作 jar 文件时导致一些奇怪的错误。有什么办法可以正确加载这个字体吗？顺便提一句。我记得在项目的早期阶段，我已经构建了带有字体的 jar 文件，并且它可以正常工作....我在这里感到困惑。

Answer 1

如果您在构建项目时没有在代码中创建文件或复制它们，那么很明显它们不在构建文件夹中。

例如，如果您使用 Ant 构建项目，则编写一个目标，将 ttf 文件复制到将创建 jar 文件的同一文件夹中。作为解决方法，您可以自己将其复制到同一文件夹中。

Answer 2

所以根据 Juce 的信息，我一直在互联网上寻找如何将字体包含到 jar 中然后使用它的解决方案。我找到了这段代码：

InputStream istream = getClass().getResourceAsStream("/resources/SerpentineBolditalic.ttf");
Font myFont = Font.createFont(Font.TRUETYPE_FONT, istream);
myFont = myFont.deriveFont(36.0f);
lblNewLabel.setFont(myFont);

然而，像 Font.TRUETYPE_FONT 这样的一些代码似乎在当前的 Java 版本中贬值了。所以我不得不做出一些改变，现在一切似乎都正常了：

InputStream is = this.getClass().getResourceAsStream("/DS-DIGIT.TTF");
Font uniFont = Font.loadFont(is, 30);
labTime.setFont(uniFont);