如何将jar中的资源文件夹复制到程序文件中

Question

我花了好几个小时寻找答案，但我还是想不出答案，我正试图将包含我正在处理的游戏的所有图像和数据文件的资源文件夹从运行的jar中复制到e：/program files/mtd中/当我从eclipse中运行它时，它工作得很好，但当我导出jar并尝试它时，我得到了NoSuchFileException

`JAR
Installing...
file:///C:/Users/Cam/Desktop/mtd.jar/resources to file:///E:/Program%20Files/mtd
/resources
java.nio.file.NoSuchFileException: C:\Users\Cam\Desktop\mtd.jar\resources
        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.WindowsFileAttributeViews$Basic.readAttributes(Unknown Sou
rce)
        at sun.nio.fs.WindowsFileAttributeViews$Basic.readAttributes(Unknown Sou
rce)
        at sun.nio.fs.WindowsFileSystemProvider.readAttributes(Unknown Source)
        at java.nio.file.Files.readAttributes(Unknown Source)
        at java.nio.file.FileTreeWalker.walk(Unknown Source)
        at java.nio.file.FileTreeWalker.walk(Unknown Source)
        at java.nio.file.Files.walkFileTree(Unknown Source)
        at java.nio.file.Files.walkFileTree(Unknown Source)
        at me.Zacx.mtd.main.Game.<init>(Game.java:94)
        at me.Zacx.mtd.main.Game.main(Game.java:301)`

    if (!pfFolder.exists()) {
    pfFolder.mkdir();
    try {

        URL url = getClass().getResource("/resources/");
        URI uri = null;

        if (url.getProtocol().equals("jar")) {
            System.out.println("JAR");
            JarURLConnection connect = (JarURLConnection) url.openConnection();
            uri = new URI(connect.getJarFileURL().toURI().toString() + "/resources/");

        } else if (url.getProtocol().equals("file")) {
            System.out.println("FILE");
            uri = url.toURI();
        }

        final Path src = Paths.get(uri);
        final Path tar = Paths.get(System.getenv("ProgramFiles") + "/mtd/resources/");

        System.out.println("Installing...");
        System.out.println(src.toUri() + " to " + tar.toUri());

        Files.walkFileTree(src, new SimpleFileVisitor<Path>() {
            public FileVisitResult visitFile( Path file, BasicFileAttributes attrs ) throws IOException {
                return copy(file);
            }
            public FileVisitResult preVisitDirectory( Path dir, BasicFileAttributes attrs ) throws IOException {
                return copy(dir);
            }
            private FileVisitResult copy( Path fileOrDir ) throws IOException {
                System.out.println("Copying " + fileOrDir.toUri() + " to " + tar.resolve( src.relativize( fileOrDir ) ).toUri());
                Files.copy( fileOrDir, tar.resolve( src.relativize( fileOrDir ) ) );
                return FileVisitResult.CONTINUE;
            }
        });
        System.out.println("Done!");
    } catch (IOException e) {
        e.printStackTrace();
    } catch (URISyntaxException e) {
        e.printStackTrace();
    }
}

Answer 1

这比我想的更难，但这里是如何做到这一点。

这里是我的复制方法参考https://examples.javacodeGeeks.com/core-java/io/file/4-ways-to-copy-file-in-java/

public void copyFile(String inputPath, String outputPath ) throws IOException
{

    InputStream inputStream = null;

    OutputStream outputStream = null;
    try {

        inputStream =  getClass().getResourceAsStream(inputPath);
        outputStream = new FileOutputStream(outputPath);

        byte[] buf = new byte[1024];

        int bytesRead;

        while ((bytesRead = inputStream.read(buf)) > 0) {

            outputStream.write(buf, 0, bytesRead);

       }

    }
    finally {


        inputStream.close();

        outputStream.close();

    }

请注意这个图像项目结构中Jar文件的项目的结构

public static void main(String[] args) throws IOException {
    // TODO Auto-generated method stub

    final String pathPartOne = "test/com";
    final String pathPartTwo = "/MyResources";
    String pathName = "C:\\Users\\Jonathan\\Desktop\\test.jar";

    JarTest test = new JarTest();

    final File jarFile = new File(pathName);

    if(jarFile.isFile()) {  // Run with JAR file
        final JarFile jar = new JarFile(jarFile);
        final Enumeration<JarEntry> entries = jar.entries(); //gives ALL entries in jar
        while(entries.hasMoreElements()) {
            final String name = entries.nextElement().getName();

            if (name.startsWith(pathPartOne+pathPartTwo + "/")) { //filter according to the path
                if(name.contains("."))//has extension
                {
                    String relavtivePath = name.substring(pathPartOne.length()+1);
                    String fileName = name.substring(name.lastIndexOf('/')+1);
                    System.out.println(relavtivePath);
                    System.out.println(fileName);
                    test.copyFile(relavtivePath, "C:\\Users\\Jonathan\\Desktop\\" + fileName);
                }

            }
        }
        jar.close();
    } 


}

}

希望能有所帮助。