文件下载代码

public void export(String resId){ // path是指欲下载的文件的路径。
   String path = ((HttpServletRequest)Result.getServletRequest()).getRealPath("/resume")+"\\Resume_"+resId+".doc";
  OutputStream toClient = null;
  try {
   File file = new File(path);
   // 取得文件名。
   String name = file.getName();
   String ext = name.substring(name.lastIndexOf(".") + 1).toUpperCase();
   // 取得文件的后缀名。
   // 以流的形式下载文件。
   InputStream fis;
   fis = new BufferedInputStream(new FileInputStream(file));
   byte[] buffer = new byte[fis.available()];
   fis.read(buffer);
   fis.close();
   // 清空response
   HttpServletResponse response =((HttpServletResponse)Result.getServletResponse());
   response.reset();
   // 设置response的Header
   response.addHeader("Content-Disposition", "attachment;filename=" + name);
   response.addHeader("Content-Length", "" + file.length());
   toClient = response.getOutputStream();
   response.setContentType("application/octet-stream");
   toClient.write(buffer);
   toClient.flush();
   toClient.close();
  } catch (Exception e) {
   e.printStackTrace();
  }finally{
   try{
    if(toClient != null){
     toClient.flush();
     toClient.close();
    }
   }catch(Exception e){
    e.printStackTrace();
   }
  }
 }