java.nio.file.NoSuchFileException：

Question

我试图使用loadPlayerDataFromFile方法从文件中加载带有文本的应用程序数据：

public void loadPlayerDataFromFile(File file) {
    XStream xstream = new XStream();
    xstream.alias("player", Player.class);

    try {
        String xml = FileUtil.readFile(file);

        ArrayList<Player> playerList = (ArrayList<Player>) xstream
                .fromXML(xml);

        playerData.clear();
        playerData.addAll(playerList);

        setPlayerFilePath(file);
    } catch (Exception e) { // catches ANY exception                        
         Dialogs.showErrorDialog(primaryStage,
         "Could not load data from file:\n" + file.getPath(),
         "Could not load data", "Error", e);             
    }
}
public File getPlayerFilePath() {
    Preferences prefs = Preferences.userNodeForPackage(GameApp.class);
    prefs.put( "playerPath", getClass().getResource("resources/PlayerList.xml").getFile());
    String filePath = prefs.get("playerPath", "default");
    if (filePath != null) {
        return new File(filePath);
    } else {
        return null;
    }
}

public void setPlayerFilePath(File file) {
    Preferences prefs = Preferences.userNodeForPackage(GameApp.class);
    if (file != null) {
        prefs.put("filePath", file.getPath());
        // Update the stage title
        //primaryStage.setTitle("Player - " + file.getName());
    } else {
        prefs.remove("filePath");
        // Update the stage title
        //primaryStage.setTitle("Player");
    }
}

当我试图运行应用程序时，它会显示以下错误消息：

C:\Users\%d0%90%d0%bb%d0%b5%d0%ba%d1%81%d0%b0%d0%bd%d0%b4%d1%80\TowerDefense\TDv2\bin\application\resources\PlayerList.xml at sun.nio.fs.WindowsException.translateToIOException(Unknown Source) at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source) at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source) at sun.nio.fs.WindowsFileSystemProvider.newByteChannel(Unknown源)在java.nio.file.Files.newByteChannel(未知源)在java.nio.file.Files.newByteChannel(未知源)在java.nio.file.spi.FileSystemProvider.newInputStream(Unknown源)在java.nio.file.Files.newInputStream(未知源)在java.nio.file.Files.newBufferedReader(未知源)在application.util.FileUtil.readFile(FileUtil.java:19) at application.GameApp.loadPlayerDataFromFile(GameApp.java:242)在com.sun.javafx.application.LauncherImpl$5.run(Unknown来源的application.GameApp.start(GameApp.java:85) )在com.sun.javafx.application.PlatformImpl$4$1.run(Unknown来源(在com.sun.javafx.application.PlatformImpl$4$1.run(Unknown来源)在com.sun.javafx.application.PlatformImpl$4$1.run(Unknown来源)(在java.security.AccessController.doPrivileged(Native方法)(在com.sun.javafx.application)。PlatformImpl$4.运行(未知源)在com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown源)在com.sun.glass.ui.win.WinApplication._runLoop(Native方法)在com.sun.glass.ui.win.WinApplication.access$100(Unknown源)在com.sun.glass.ui.win.WinApplication$3$1.run(Unknown源)在java.lang.Thread.run(未知源)

Answer 1

首先，检查您的文件C:\Users\%d0%90%d0%bb%d0%b5%d0%ba%d1%81%d0%b0%d0%bd%d0%b4%d1%80\TowerDefense\TDv2\bin\application\resources\PlayerList.xml是否存在。如果存在，那么从jar检查它是否正确的文件路径。