Java如何从jar文件中获取资源“文件夹”？

最后，我找到了解决方案：

final String path = "sample/folder";final File jarFile = new File(getClass().getProtectionDomain().getCodeSource().getLocation().getPath());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(path + "/")) { //filter according to the path System.out.println(name);        }    }    jar.close();} else { // Run with IDE    final URL url = Launcher.class.getResource("/" + path);    if (url != null) {        try { final File apps = new File(url.toURI()); for (File app : apps.listFiles()) {     System.out.println(app); }        } catch (URISyntaxException ex) { // never happens        }    }}

第二个块仅在IDE上运行应用程序时有效（不适用于jar文件），如果不喜欢，可以将其删除。