@RequestMapping(value = "/getAnswerByQuestionId",method = RequestMethod.GET)
public String getAnswerByQuestionId(ModelMap map,@RequestParam("id")int id){
    List<Answer> findAllBYQuestionId=answerRepository.findAllByQuestionId(id);
    map.addAttribute("findAllAnswersByQuestionId",findAllBYQuestionId);
    map.addAttribute("addAnswer",new Answer());
    return "answerResult";
}

<spring:form action="/addAnswer" method="post" enctype="multipart/form-data" modelAttribute="addAnswer">
<c:forEach items="${findAllAnswersByQuestionId}" var="name">
    ${name.text}
<input type="hidden" value="${name.id}" name="questionId">

</c:forEach>
    <spring:textarea path="text"></spring:textarea>
    <input type="file" name="pict">
    <input type="submit" value="add">

</spring:form>

@RequestMapping(value = "/addAnswer",method = RequestMethod.POST)
    public String addAnswer(@ModelAttribute("answer")Answer answer,@AuthenticationPrincipal UserDetails userDetails,@RequestParam("questionId")int id,@RequestParam("pict")MultipartFile[] files) throws IOException {
        File dir = new File(imageUploadPath);
        if (!dir.exists()) {
            dir.mkdir();
        }
        for (MultipartFile file : files) {
            String picName = System.currentTimeMillis() + "_" + file.getOriginalFilename();
            File picture = new File("D:\bankSystem\" + picName);
            file.transferTo(picture);
            answer.setImage(picName);
            answer.setUserUsername(userDetails.getUsername());
            answer.setQuestionId(id);
        }
        answerRepository.save(answer);
        return "redirect:/getAnswerByQuestionId";

    }

request param id is not present