客户端下载服务器端的excel模板文件，

Question

jsp页面有个“模板下载”按钮，点击按钮后，将位于服务器端的某个文件夹下的excel模板文件打开，只用打开就可以，请求帮助怎么实现？

Answer 1

对，我的示例代码大致上是这样的，你按需修改
[code="java"]
protected void downloadFile(String filePath, String showNam, boolean isOnLine) throws IOException{

       File f = new File(filePath);
       HttpServletResponse response = getResponse();
       if (!f.exists()) {
         response.sendError(404, "File not found!");
         return ;
       }

       response.reset(); //非常重要
       if (isOnLine) { //在线打开方式
         URL u = new URL("file:///" + filePath);
         response.setContentType(u.openConnection().getContentType());
         response.setHeader("Content-Disposition", "inline; filename=\""  + new String(showNam.getBytes("gb2312"),"iso-8859-1") + "\"");
        //文件名应该编码成UTF-8
       }
       else { //纯下载方式
         response.setContentType("application/x-msdownload");
         response.setHeader("Content-Disposition", "attachment; filename=\""+ new String(showNam.getBytes("gb2312"),"iso-8859-1") + "\"");

       }
       InputStream inStream = new FileInputStream(f);
       OutputStream outStream = response.getOutputStream();
       byte[] b = new byte[100];
       int len;
        try {
            while ((len = inStream.read(b)) > 0) outStream.write(b, 0, len);
            inStream.close();
        } catch (IOException e) {
            logger.error("file [" + f + "] download fail.");
            logger.error(e);
        } 


        outStream.flush();
        outStream.close();



}

[/code]