Spring Boot - Multipart - Unsupported Media Type

Question

I want to send a file and a json model at one post request.

My Request Mapping looks like that:

    @PostMapping(\"{id}/files\")
    public MyOutput          


        

Answer 1

You can try to use instead of this

@RequestPart("file") MultipartFile file

use this

@RequestParam(value = "file",required = false) MultipartFile file

And be sure you set the request type as multipart/form-data You can set it from postman in the headers tab.

If another object you need to send with multipart file,you can send it as a string and then you can convert it to object at the backend side.

  @PostMapping("/upload")
    public void uploadFile(@Nullable @RequestParam(value = "file",required = false) MultipartFile file,
                                            @RequestParam(value = "input", required = false) String st)
    {
        ObjectMapper om = new ObjectMapper();
        MyInput input = null;
        try {
            input = om.readValue(st, MyInput.class);   //string st -> MyInput input
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

Postman request example :