文件上传所需要的两个jar包，下载链接：https://pan.baidu.com/s/1slG8Bud

下载完放到lib文件夹下，build path即可。

html页面：

<form id="form1" enctype="multipart/form-data" method="post" action="mgr/person/promote">
        <div class="register-container" align="center">
	<h2>申请升入下一级</h2><br><br>
	
	   <h4><table>
	     <tr style="height:50px">
	       <td>当前等级：</td>
	       <td><span class="u_level"></span></td>
	     </tr>
	     <tr style="height:50px">
	       <td>等级特权：</td>
	       <td><span class="u_level_privilege"></span></td>
	     </tr>
	     <tr style="height:50px">
	       <td>上传图片：</td>
	       <td><input type="file" class="u_pic" name="pic" accept="image/*"/></td>
	     </tr>
	     <tr style="height:50px">
	       <td>视频链接：</td>
	       <td><input type="text" class="u_video" name="video" placeholder="直接输入视频所在的URL"></td>
	     </tr>
	     <tr style="height:50px">
	       <td>备注：</td>
	       <td><textarea rows="5" cols="23" class="u_note" name="note"></textarea></td>
	     </tr>
	   </table>	</h4>	
	
</div><br><br>
  	<center><input type="submit" onclick="return promote()" style="width:100px;height:40px;font-size:18px" value="申请升级"></center>
  	</form>

js代码：

function promote()
{	
	var pic=$("input.u_pic").val();
	var patn = /\.jpg$|\.jpeg$|\.png$|\.gif$/i;
	if (!patn.test(pic)) 
	{
	   alert("请选择图片!");
	   return false;
	}
	var videopath=$("input.u_video").val();
    if(videopath=="")
    {
       alert("必须输入视频链接地址！"); 
       return false;
    }
    
}

controller中代码：

@ResponseBody
	@RequestMapping(value = "promote")
	@SecureValid(code = "11", desc = "申请升级", type = MethodType.FIND)
	public ModelAndView promote(@RequestParam("pic") MultipartFile pic,@RequestParam("video") String video,@RequestParam("note") String note,HttpSession httpsession,HttpServletRequest request,HttpServletResponse response) 
	{
		String path=request.getSession().getServletContext().getRealPath("upload");
		String originalFilename=pic.getOriginalFilename();
		String fileName=new Date().getTime()+originalFilename.substring(originalFilename.lastIndexOf("."));
		System.out.println(path);
		System.out.println(fileName);
		File targetFile=new File(path,fileName);
		if(!targetFile.exists())
		{
           targetFile.mkdirs();
		}
         try
         {
        	 pic.transferTo(targetFile);
		 }
		catch(Exception e)
		{
			e.printStackTrace();
		}
		userPersonService.promote(fileName,video,note,acctName(httpsession));
		ModelAndView mv = new ModelAndView("redirect:/a_user.html");
	    return mv;

	}