安卓上传文件到springMVC为服务器接收?如何实现呢?

安卓代码:

/**
     * 上传文件
     */
    public static void upload(String filePath,String reqUrl) {
//        CloseableHttpClient httpclient = HttpClients.createDefault();
        HttpClient httpclient = new DefaultHttpClient();
        httpclient.getParams().setParameter(CoreProtocolPNames.PROTOCOL_VERSION, HttpVersion.HTTP_1_1);
        try {

            HttpPost httppost = new HttpPost(reqUrl);
            MultipartEntity multipartEntity = new MultipartEntity();

            ContentBody fid = new FileBody(new File(filePath));

            multipartEntity.addPart("file",fid);
            httppost.setEntity(multipartEntity);
            HttpResponse response = httpclient.execute(httppost);

            StatusLine statusLine = response.getStatusLine();

            if (statusLine.getStatusCode() == HttpStatus.SC_OK) {

                HttpEntity entity = response.getEntity();

                String result = EntityUtils.toString(entity);

                Log.i("TAG", "*******" + result);

            } else {

                Log.i("TAG", "请求出了问题");

            }

        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } 
        
    }

服务器springMVC代码:

    @RequestMapping(value = "/uploadRecord", method = RequestMethod.POST)
    public String uploadTest(@RequestParam(value = "file",required = false) MultipartFile file, HttpServletRequest request) {

        System.out.println("hello,how are you sdfdfdsfdfdfdfdfsd");


//        String savePath = request.getServletContext().getRealPath("/recodFiles/") + file.getOriginalFilename();

        System.out.println("5444444444444444444:"+file.getOriginalFilename());



        return "";
    }

以上,springMVC端死活获取不到 file ,说它不存在,所以,空指针。

请问,如何实现 安卓上传文件到springMVC上面去啊?求解求解。
有代码求代码

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