简单的下载Execl文件程序

一个简单的Servlet程序片段，从服务器端下载Excel

/**
   * 
   * @param response
   * @param fileDownPath Excel 存储在服务器端的Excel文件路径
   * 
   */
  public void DownExcelFile(HttpServletResponse response, String fileDownPath) {
    File file = new File(fileDownPath);
    if (file.exists()) {
      try {
        // 导出样式
        response.setContentType("application/x-msexcel");
        String fileName = fileDownPath;
        // 保存文件名称
        fileName = fileName.substring(fileName.lastIndexOf("/") + 1);
        // 处理中文
        fileName = new String(fileName.getBytes("GB2312"), "ISO-8859-1");
        response.setHeader("Content-Disposition",
            "attachment; filename=" + fileName);
        FileInputStream bis = new FileInputStream(file);
        OutputStream bos = response.getOutputStream();
        byte[] buff = new byte[1024];
        int readCount = 0;
        //每次从文件流中读1024个字节到缓冲里。
        readCount = bis.read(buff);
        while (readCount != -1) {
          //把缓冲里的数据写入浏览器
          bos.write(buff, 0, readCount);
          readCount = bis.read(buff);
        }
        if (bis != null) {
          bis.close();
        }
        if (bos != null) {
          bos.close();
        }
        // 下载完毕，给浏览器发给完毕的头
        response.setStatus(HttpServletResponse.SC_OK);
        response.flushBuffer();
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }