code: public static void cleanAllFolderInSubFolderes(File dir, String name) throws IOException {
          File[] files = dir.listFiles();
          if (files == null)
          	return;
          for (File d : files) {
              if (d.isDirectory())
                  if (d.getName().equalsIgnoreCase(name))
                      deleteDir(d);
                  else
                      cleanAllFolderInSubFolderes(d, name);
          }
      }
docs: 将一个目录下的特殊名称的目录彻底删除，比如 '.svn' 或者 '.cvs'
  
  @param dir
  目录
  @param name
  要清除的目录名
  @throws IOException