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Spring boot fetch image data from request

I was experimenting a little bit with uploading image to my server. I am sending image from postman as binary body. Content-type is image/png. What I do not know is how to fetch this image on in my controller. This is screenshot of how I am sending image.So the question is how to fetch this image from controller?

This is my code:

 @PostMapping(path="/upload")
    public String upload(HttpServletRequest httpServletRequest) {
        //HOT TO FETCH IMAGE FROM HTTPSERVLET REQUEST HERE?
        return "HOW TO FETCH IMAGE FROM CONTROLLER? ";    
    }

Thanks in advance:)

try this, to get the file

@PostMapping(path="/upload")
public String upload(@RequestParam("file") MultipartFile fil) {

}

to manipulate it, u just need to convert it to an InputStream Object

file.getInputStream()

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