springmvc下载方法

@SuppressWarnings("deprecation")
    @RequestMapping("/Download_Form")
    @ResponseBody
    public void DownloadFile(HttpServletRequest request,HttpServletResponse response, String filename)
    {
        try
        {
            String cPth = XmlUtil.XmlRead(request.getRealPath("/")+ "\\xml\\config.xml", "fileupload-path");
            String new_file = DateUtil.formatDate(new Date(), "yyyyMdHHmmss")+ String_Utils.subString(filename, filename.lastIndexOf("."),filename.length());
            String down_file = cPth + filename;
            String newPath = request.getRealPath("/") + "download\\";
            File fi = new File(newPath);
            if (!fi.exists())
            {
                DealWithDir.newDir(newPath);
            }
            UploadUtil.copy(new File(down_file), new File(newPath + new_file));
            String fileNamePath=newPath + new_file;
            response.addHeader("Content-Disposition","attachment;filename=" + new_file);//
            FileInputStream in=new FileInputStream(fileNamePath);
            OutputStream os=response.getOutputStream();
            byte[] b=new byte[in.available()];
            int count=in.read(b);
            while(count>0){
                os.write(b, 0, count);
                count=in.read(b);
            }
            in.close();
            os.close();
            
            File fii=new File(fileNamePath);
            fii.delete();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

 直接上代码，都是些基础代码，应该看得懂；

控制器完成；

前台使用JQUERY的js.filedownload.js插件进行构建

if(window.confirm("确定要下载?")){

$.fileDownload("${contextPath}/main/task/Download_Form.html", {

//preparingMessageHtml: "正在为您下载文件，请稍后...",

   //failMessageHtml: "生成文件失败，请重试",

   httpMethod: "POST",

   data : "filename=" + value

});

      }

在项目文件夹WEBROOT下建立fileupload,filedownload两个文件夹

就可以用了