文件上传:简单的demo

/*
   接收前台传来的视频，把视频放到服务器中，并把视频地址保存到数据库
    */
   @RequestMapping(value = "/vms/media_main/saveVideo.do")
   public void saveVideo(@RequestParam("file")CommonsMultipartFile file, HttpServletRequest req, HttpServletResponse res) {

      Videoinfo videoinfo = new Videoinfo();
      String date = DateUtil.dateToString("yyyyMMdd",new Date());
      String path = "/home/nginx/vod/videos/upload/"+date+"/"+username;
      String name = file.getOriginalFilename(); //上传时的文件名
      int k = name.lastIndexOf(".");
      String videoname = name.substring(0,k);
      String format = name.substring(k+1).toUpperCase();//获取文件类型
      Date date1 = new Date();
      SimpleDateFormat format1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
      //创建一个图片名字
      String fileName = new Date().getTime()+(int)(Math.random()*100)+name.substring(name.lastIndexOf("."));
      InputStream is;
      OutputStream os;
      String video = "" ;
      try {
         is = file.getInputStream();
         File paths = new File(path);
         if (!paths.exists()) {
            paths.mkdirs();
         }
         os = new FileOutputStream(new File(path,fileName));
         int  len = 0;
         byte[] buffer = new byte[400];
         while((len=is.read(buffer))!=-1){
            os.write(buffer,0,len);
         }
         os.close();
         is.close();

         video = "videos/upload/"+date+"/"+username+"/"+fileName;

         videoinfo.setPath(video);
         videoinfo.setFormat(format);
         videoinfo.setVideoname(videoname);
         videoinfo.setCreatetime(format1.format(date1));
         videoinfo.setStatus(1);
         videoService.addSave(videoinfo);

      } catch (Exception e) {
         e.printStackTrace();
      }
   }

<form action="" enctype="multipart/form-data" method="post">
 上传文件：<input type="file" name="file"><br/> 
<input type="submit" value="提交"> 
</form>