springmvc表单提交出现WARNING: Request method 'GET' not supported

明明表单提交的method设置为post，然后在controller那设置只能请求为post请求

然后第一次post请求是正常的，第二次开始后便不正常了，出现post的请求302，get请求405；这个结果很纳闷吧

 <!--注意action的路径-->
<form id="form1"  action="upload" method="post" enctype="multipart/form-data">

    <div>

     <h2>一次选择多个文件进行上传</h2>

    </div>

	<input type="file" value="" name="file"/>
	<input type="submit">
    </form>

请求

@RequestMapping(value="/upload",method=RequestMethod.POST)
    public void uploadify(@RequestParam("file")MultipartFile multiFile,HttpServletRequest request, HttpServletResponse response) throws IOException, FileUploadException{
        System.out.println("上传文件");
        System.out.println("name:"+multiFile.getOriginalFilename());
        System.out.println("inputstream"+multiFile.getInputStream());

        /*MultipartHttpServletRequest multipartRequest = (MultipartHttpServletRequest) request;
        MultipartFile multiFile = multipartRequest.getFile("Filedata");*/
        ServletContext sc = request.getSession().getServletContext();
        String dir = sc.getRealPath("/upload");//附件存放服务器的路径
        System.out.println(dir);
        File file = new File(dir);
        if(!file.exists()){
            file.mkdirs();
        }
        String filename = multiFile.getOriginalFilename();
        String realname = filename.substring(0, filename.indexOf("."));
        //防止文件被覆盖，以纳秒生成文件
        Long _l = System.nanoTime();
        String _extfilename = filename.substring(filename.indexOf("."));
        filename = _l+_extfilename;
        String uploadPath = request.getContextPath()+""+dir+"/"+filename;
        String responseStr = "";
        try {
            FileUtils.writeByteArrayToFile(new File(dir, filename), multiFile.getBytes());
            responseStr = "上传成功！";

        } catch (Exception e) {
            e.printStackTrace();
            responseStr = "fail";
            System.out.println("上传失败！");
        }
｝

　　然后，我再改一下action路径——在action路径的基础上加上"/"

结果，就正常发送post的请求，后台服务器也不报WARNING: Request method ‘GET‘ not supported

<form id="form1"  action="upload/" method="post" enctype="multipart/form-data">

    <div>

     <h2>一次选择多个文件进行上传</h2>

    </div>

    <input type="file" value="" name="file"/>
    <input type="submit">
    </form>

分析：

在请求中可能出现重名的请求情况

这样spingmvc就不能正常解析请求了

springmvc表单提交出现WARNING: Request method 'GET' not supported