如何使用RestTemplate调用MultipartFile Spring REST URL

当我尝试使用我的Spring模板基础测试方法调用以下MultipartFile Spring REST URL时,我遇到了以下异常.我怎样才能做到这一点.谢谢.

Spring REST URL:

 @RequestMapping(value = "/media/uploadMultipartFile/{token}/{title}/{trailId}/{wpId}", method = RequestMethod.POST)
 public @ResponseBody MediaHttp uploadMultipartFile(@RequestParam MultipartFile file,
                                                    @PathVariable String token,
                                                    @PathVariable String title,
                                                    @PathVariable String trailId,
                                                    @PathVariable String wpId,
                                                    HttpServletResponse response)

测试方法:

try {

        // Message Converters
        List> messageConverters = new ArrayList>();
        messageConverters.add(new FormHttpMessageConverter());
        messageConverters.add(new SourceHttpMessageConverter());
        messageConverters.add(new StringHttpMessageConverter());
        messageConverters.add(new MappingJacksonHttpMessageConverter());

        // RestTemplate
        RestTemplate template = new RestTemplate();
        template.setMessageConverters(messageConverters);

        // URL Parameters
        MultiValueMap parts = new LinkedMultiValueMap();
        parts.add("token", "nkc2jvbrbc");
        parts.add("title", "test mp4 file");
        parts.add("trailId", "2");
        parts.add("wpId", "7");
        parts.add("file", new FileSystemResource("C:\\Users\\Public\\Pictures\\Sample Pictures\\test.mp4"));

        // Post
        MediaHttp result = template.postForObject(Constants.APPLICATION_URL + "/media/uploadMultipartFile/{token}/{title}/{trailId}/{wpId}", parts, MediaHttp.class);

    } catch (Exception e) {
        System.out.println("Error: " + e.getMessage());
    }

例外:

[ http://test.com:8080/DMW-skeleton-1.0/media/uploadMultipartFile/ {token}/{title}/{trailId}/{wpId}]中的变量值无效:预期为4; 得到0