@PostMapping("/save")
public String saveCourseWithPhoto(@ModelAttribute("course") Course course,
                         @RequestParam("file") MultipartFile file) throws IOException {
    String fileName = StringUtils.cleanPath(file.getOriginalFilename());

    if (!(fileName == null) || fileName.contains("..")) {
        InputStream photoInput  = file.getInputStream();
        byte[] photoBytes = new byte[photoInput.read()];
       // InputStream inputStream = new ByteArrayInputStream(photoBytes);
        course.setPhoto(photoBytes);
        courseService.saveCourseWithPhoto(course);
        return "redirect:/profile";
    }
    .......
    return "redirect:/courses";

}

@Override
public void saveCourseWithPhoto(Course theCourse){
    courseRepository.save(theCourse);
}