URL加载jar

　// !/test.xml 是表示jar中的test.xml文件
  final URL jarUrl = new URL("jar:file:/C:/proj/parser/jar/parser.jar!/test.xml");
    final JarURLConnection connection =
        (JarURLConnection) jarUrl.openConnection();
    final URL url = connection.getJarFileURL();

    System.out.println(url.getFile());