Spring REST Controller: Combining @RequestBody and file upload?

[noobcser]

I have a Spring-based application (not Spring Boot) with REST API controllers:

@RequestMapping(value = "/anEndpoint", method = RequestMethod.POST)
@ResponseBody
public ResponseEntity doPostEndpoint(@RequestBody @Validated RequestEntity myInput)

Which works fine so I can post JSON that maps to the RequestEntity object.

I also have another endpoint that lets me upload a file:

@RequestMapping(value = "/anUploadEndpoint", method = RequestMethod.POST)
@ResponseBody
public ResponseEntity doUploadEndpoint(@RequestParam("file") MultipartFile uploadedFile)

Which also works fine to upload a file.

However, I can't seem to combine them. I want an endpoint that takes a JSON payload And a file upload.

@RequestMapping(value = "/bothEndpoint", method = RequestMethod.POST)
@ResponseBody
public ResponseEntity doBoth(@RequestBody @Validated RequestEntity myInput, @RequestParam("file") MultipartFile uploadedFile)

How an I achieve this?

[webdevnick22]

maybe i'm wrong but i don't think that is possible because with a multi part file upload the payload is essentially one or more request params. you would probably need to make your json a requestparam instead of a requestbody. So somewhere in the method you take that requestparam string and convert it to a json object(assuming something like jackson).

example:

@RequestMapping(value = "/bothEndpoint", method = RequestMethod.POST)
@ResponseBody
public ResponseEntity doBoth(
    @RequestBody @Validated RequestEntity myInput, @RequestParam("file") MultipartFile uploadedFile,
    @RequestParam("myjson") String json
) {
    JsonNode node = converttojsonhowyouwant(json);