MissingServletRequestPartException：所需的请求部分“文件”不存在 Springboot

Question

I have a controller that performs file upload , i'm trying to post a request to controller endpoint from another service.

@RequestMapping(path = "/upload/{id}", method = RequestMethod.POST)
    public String uploadBaseImage(@RequestParam("data") String imageData, @RequestParam("file") MultipartFile file,@PathVariable("id") String id)
            throws Exception {
        String imageUrl = feedHandler.UploadAndSetImageUrl(imageData, file,Integer.parseInt(id));
        return imageUrl;
    }

Code from where i'm calling the above endpoint

public SupplierFeedResponse uploadBaseFeedImage(String data, MultipartFile file, String supplierId) throws IOException {
        String uploadBaseFeedEndpoint = uploadFeedEndpoint+Constants.FEED_SERVICE_BASE_FEED_UPLOAD_URI+supplierId;
        SupplierFeedResponse supplierFeedResponse =  new SupplierFeedResponse();
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.MULTIPART_FORM_DATA);
        MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
        body.add("file", new ByteArrayResource(file.getBytes()));
        body.add("data", data);

        log.info("Request body : "+body.toString());

        HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(body, headers);
        RestTemplate restTemplate = new RestTemplate();
        ResponseEntity<String> response = restTemplate.postForEntity(uploadBaseFeedEndpoint, requestEntity, String.class);
        return supplierFeedResponse;

    }

I'm getting the below error, don't know the reason:

[MissingServletRequestPartException: Required request part 'file' is not present]

Been looking around for a while with no solution.

Answer 1

Probably, you are missing file param within your request, so you must consider file param inside of your request. Also you can add new attribute ( require ) inside @RequestParam such as @RequestParam(value = "file", required = false) . Purpose of required attribute, to make request parameter to be required (if true) or optional (if false).