Jar-related file reading

1. Read a file in the jar package

          InputStream input = getClass().getResourceAsStream ("file relative path");//Read the input stream of the file

   String allPath = getClass().getResource(""); //Read the full path, such as jar: file:/c:/xxx.jar!/org/apache/...

2. Read all files in a directory in the jar package

         JarFile needs to be used, for example:

        File file = new File("full path to jarFile");

        String path="META-INF";

       JarFile jar = new JarFile(file);

        Enumeration<JarEntry> entries =  jar.entries();
          while(entries.hasMoreElements())

        {
              JarEntry tmp = entries.nextElement();
                final String name = entries.nextElement().getName();
                if (name.startsWith(path + "/")) { //匹配path路径
                    System.out.println(name);
                }
            }