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@Override public void updateHead(@NonNull RequestForm requestForm, @NonNull UpdateHead callback) {
        RequestBody requestFile1;     MultipartBody.Part part1;     File file1 = new File(requestForm.getQuest_id());     requestFile1 = RequestBody.create(MediaType.parse("multipart/form-data"), file1);     part1 = MultipartBody.Part.createFormData("file", file1.getName(), requestFile1);     NetworkManager.getUserInstance()     		 .getUserApi()             .updateHead(part1)             .subscribeOn(Schedulers.newThread())//子线程访问网络             .observeOn(AndroidSchedulers.mainThread())//回调到主线程             .doOnSubscribe(() -> {
                })             .subscribe(defaultResponseVo -> {
                    try {
                        callback.onDataAvailable(defaultResponseVo);                 } catch (Exception e) {
                        e.printStackTrace();                 }             }, throwable -> {
                    try {
                        callback.onDataNotAvailable(throwable);                 } catch (Exception e) {
                        e.printStackTrace();                 }             });}

requestForm.getQuest_id()为文件的路径

@Multipart@POST("/users/updateHead")Observable
   
     updateHead(@Part MultipartBody.Part file);
   

后台：

@RequestMapping(value = "/updateHead")@ResponseBodypublic ResponseBuilder updateHead(HttpServletRequest request, @RequestParam("file") MultipartFile uploadFile) {
   	String user = (String) request.getAttribute("USER");	if (StringUtil.isEmpty(user))		return ResponseBuilder.ERROR_AUTHORIZATION_FAIL;	try {
   		FastDFSClient fastDFSClient = new FastDFSClient("classpath:conf/client.conf");		String originalFileName = uploadFile.getOriginalFilename();		String extName = originalFileName.substring(originalFileName.lastIndexOf(".") + 1);		String url = fastDFSClient.uploadFile(uploadFile.getBytes(), extName);		url = HealthConstant.IMAGE_SERVER_URL + url;		userService.updateUser(user, url);		ResponseBuilder reBuilder = ResponseBuilder.SUCCESS;		reBuilder.setResult(url);		return reBuilder;	} catch (Exception e) {
   		e.printStackTrace();		return new ResponseBuilder(400, 99, "图片上传失败");	}}

后台图片上传我是用FASTDFS

后台接收图片

   
   	
    
     commons-fileupload
    	
    
     commons-fileupload
    
   

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