使用Retrofit2.0+spingmvc上传图片和参数

如题，使用SPINGMVC接收数据

服务端接口如下

    @RequestMapping(value ="/photo", method = RequestMethod.POST)
    @ApiOperation(value = "XXX", notes = "XXX")
    public ResponseBean photo(@ApiParam(required = true, name = "param1", value = "XXX")@RequestParam String param1,
                              @ApiParam(required = true, name = "param2", value = "XXX")@RequestParam Long param2,
                              @ApiParam(required = true, name = "param3", value = "XXX")@RequestParam String param3,
                              @ApiParam(required = true, name = "param4", value = "XXX")@RequestParam int param4,
                              HttpServletRequest request){

处理图片的流程如下，在使用如下的方法是容易导致绑定解析错误

//MultipartHttpServletRequest multiRequest = multipartResolver.resolveMultipart(request)

修改成如下：

public static List<FileInfo> multipartUpload(HttpServletRequest request) throws Exception {
        List<FileInfo> list = new ArrayList();
        MultipartResolver multipartResolver = new CommonsMultipartResolver(request.getSession().getServletContext());
        //判断 request 是否有文件上传,即多部分请求
        if(multipartResolver.isMultipart(request)) {
            //转换成多部分request
            //MultipartHttpServletRequest multiRequest = multipartResolver.resolveMultipart(request);<==caused error
            MultipartHttpServletRequest multiRequest = (MultipartHttpServletRequest)(request);
            List<MultipartFile> multipartFileList =  multiRequest.getFiles("file");
            if (multipartFileList.size()==0){//ios版本
                //取得request中的所有文件名
                Iterator<String> iter = multiRequest.getFileNames();
                while (iter.hasNext()) {
                    //取得上传文件
                    MultipartFile file = multiRequest.getFile(iter.next());
                    list.add(FastDFS(file));//上传头像
                }
            }else{//android版本
                for (MultipartFile file :multipartFileList){
                    list.add(FastDFS(file));//上传头像
                }
            }
        }
        return list;
    }

安卓端处理如下：最开始是打算1-1处理，最终还是整体作为RequestBody来处理，这样服务端接的时候，数据就会在multiRequest;

        RequestBody requestBody = new MultipartBody.Builder()
                .addFormDataPart("file", file.getName(), RequestBody.create(MediaType.parse("image/*"), file))
                .addFormDataPart("param1", param1)
                .addFormDataPart("param2", param2)
                .addFormDataPart("param3, param3)
                .addFormDataPart("param4", param4+"").build();

        Observable observable = connectionService.photo(requestBody).map(new HttpResultFunc<Long>());

/***********使用OHTTP3**************/

 RequestBody filePartBody = new MultipartBody.Builder()
                            .addFormDataPart("file", pressedPhotoFile.getName(), RequestBody.create(MediaType.parse("image/*"), pressedPhotoFile))
                            .addFormDataPart("param1", param1)
                            .addFormDataPart("param2", param2)
                            .addFormDataPart("param3", param3)
                            .addFormDataPart("param4", param4).build();

                    Request request = new Request.Builder()
                            .url(ConstantNewValue.PHOTO_INTERFACE)
                            .post(filePartBody)
                            .build();

                    OkHttpClient.Builder builder = new OkHttpClient.Builder();
                    OkHttpClient okHttpClient = builder
                            .connectTimeout(200, TimeUnit.SECONDS)
                            .addInterceptor(new ReadCookieInterceptor())
                            .build();

                    response = okHttpClient.newCall(request).execute();
                    String mResult = response.body().string();