复制文件或文件夹Java方法

/**
   * 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 boolean 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]);
        }
      }
      return true;
    } catch (Exception e) {
      System.out.println("出错");
      logger.error("创建出错:" + e.getStackTrace().toString());
      return false;
    }
  }