code: public static String normalize(String path, String enc) {
          if (Strings.isEmpty(path))
              return null;
          if (path.charAt(0) == '~')
              path = Disks.home() + path.substring(1);
          try {
              return URLDecoder.decode(path, enc);
          }
          catch (UnsupportedEncodingException e) {
              return null;
          }
      }
docs: 让路径变成正常路径，将 ~ 替换成用户主目录
  
  @param path
  路径
  @param enc
  路径编码方式
  @return 正常化后的路径