文件下载

/**   * 文件下载   * @param fileUrl    要下载的文件路径   *    */  public void downLoad(HttpServletResponse response, String headName,                       String fileUrl) {    if (headName.endsWith(".txt")) {      response.setContentType("text/plain");      response.addHeader("Content-disposition","attachment; filename=" + headName);    }    else {      response.setContentType("application/x-msdownload");      response.addHeader("Content-disposition","attachment; filename=" + headName);    }

    String fileURL = fileUrl;    if (fileURL == null) {      return;    }

    try {      File file = new File(fileUrl);      FileInputStream bis = new FileInputStream(file);      OutputStream bos = response.getOutputStream();

      byte[] buff = new byte[1024];      int readCount = 0;      int i = 0;      readCount = bis.read(buff);      while (readCount != -1) {        bos.write(buff, 0, readCount);        readCount = bis.read(buff);      }      if (bis != null) {        bis.close();      }      if (bos != null) {        bos.close();      }

    } catch (Exception e) {      PubServers.getInstance().getMyLogInterface().myInfo("****** 下载出错了！ ******");    }

  }