今天要用到，很简单的写了下

  /**
   * Create new path and folder
   * @param pathOld String
   * @param pathNew String
   */
  public static String MAKE_DIR(String pathOld, String pathNew) {
    try {
      if (! (new File(pathOld).isDirectory())) {
        new File(pathOld);
        new File(pathOld + "\\" + pathNew).mkdirs();
      }
      else {
        new File(pathOld + "\\" + pathNew).mkdirs();
      }
    }
    catch (SecurityException e) {
      System.out.println("can not create directory");
    }
    return pathOld+pathNew+"//";
  }

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