请大家帮小弟我看下这个文件夹复制代码

    /**       * 复制整个文件夹内容       *        * @param oldPath       *            String 原文件路径 如：c:/fqf       * @param newPath       *            String 复制后路径 如：f:/fqf/ff       * @return boolean       */     public static void copyFolder(String oldPath, String newPath) {          try {              (new File(newPath)).mkdirs(); // 如果文件夹不存在 则建立新文件夹              File a = new File(oldPath);              String[] file = a.list();              File temp = null;              for (int i = 0; i < file.length; i++) {                  if (oldPath.endsWith(File.separator)) {                      temp = new File(oldPath + file[i]);                  } else {                      temp = new File(oldPath + File.separator + file[i]);                  }                   if (temp.isFile()) {                      FileInputStream input = new FileInputStream(temp);                      FileOutputStream output = new FileOutputStream(newPath                              + "/ " + (temp.getName()).toString());                      byte[] b = new byte[1024 * 5];                      int len;                      while ((len = input.read(b)) != -1) {                          output.write(b, 0, len);                      }                      output.flush();                      output.close();                      input.close();                  }                  if (temp.isDirectory()) {// 如果是子文件夹                      copyFolder(oldPath + "/ " + file[i], newPath + "/ "                             + file[i]);                  }              }          } catch (Exception e) {              System.out.println("复制整个文件夹内容操作出错 ");              e.printStackTrace();          }      }