如何修复嵌入式字体（Java）的FileNotFoundException？

Question

我在项目中使用了一些嵌入式字体。这是项目主类中使用的代码：

public class Main extends Application {

    public Main() {
    }

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) throws Exception {

        final Font myEmbeddeFont = Font.loadFont(new FileInputStream(new File("src/main/resources/myEmbeddeFont.ttf")), 14);
        final Font myEmbeddeFont2 = Font.loadFont(new FileInputStream(new File("src/main/resources/myEmbeddeFont2.TTF")), 14);

        Parent root = FXMLLoader.load(getClass().getResource("/main/HomeScreen.fxml"));

        Scene scene = new Scene(root);

        stage = stage;
        stage.setScene(scene);
        stage.setMinWidth(700);
        stage.setMinHeight(600);

        stage.show();


    }
}

当我运行intellij de项目时，它工作正常。但是，在我导出项目之后，提取的jar文件将无法运行。当我使用命令提示符打开jar文件时，它显示此错误：

Exception in Application start method
java.lang.reflect.InvocationTargetException
        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:498)
        at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
        at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
        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:498)
        at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
        at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
        at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$159(LauncherImpl.java:182)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.FileNotFoundException: src\main\resources\myEmbeddeFont.ttf (The system cannot find the path specified)
        at java.io.FileInputStream.open0(Native Method)
        at java.io.FileInputStream.open(FileInputStream.java:195)
        at java.io.FileInputStream.<init>(FileInputStream.java:138)
        at main.Main.start(Main.java:28)
        at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$166(LauncherImpl.java:863)
        at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$179(PlatformImpl.java:326)
        at com.sun.javafx.application.PlatformImpl.lambda$null$177(PlatformImpl.java:295)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.javafx.application.PlatformImpl.lambda$runLater$178(PlatformImpl.java:294)
        at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.lambda$null$152(WinApplication.java:177)
        ... 1 more
Exception running application main.Main

Answer 1

似乎引起异常的原因是使用File类加载字体，这些字体旨在访问文件系统中的文件，而不是.jar存档中的文件。一种简单的解决方案是使用ClassLoader获取InputStream，然后使用InputStream加载字体。 Font.loadFont（）方法接受任何InputStream，因此应无缝运行。请参阅this question以供参考。