질문

@GetMapping("/modify")

public String modify(@RequestParam("board_info_idx") int board_info_idx,

@RequestParam("content_idx") int content_idx,

@ModelAttribute("modifyContentBean") ContentBean modifyContentBean , 

Model model) {

model.addAttribute("board_info_idx", board_info_idx);

model.addAttribute("content_idx", content_idx);

ContentBean readContentBean = boardService.getContentInfo(content_idx);

modifyContentBean.setContent_writer_name(readContentBean.getContent_writer_name());

modifyContentBean.setContent_date(readContentBean.getContent_date());

modifyContentBean.setContent_subject(readContentBean.getContent_subject());

modifyContentBean.setContent_text(readContentBean.getContent_text());

modifyContentBean.setContent_file(readContentBean.getContent_file());

modifyContentBean.setContent_writer_idx(readContentBean.getContent_writer_idx());

modifyContentBean.setContent_board_idx(readContentBean.getContent_board_idx());

modifyContentBean.setContent_idx(readContentBean.getContent_idx());

return "board/modify";

}

여기서 contentbean 객체를 하나 생성해서 

modelattribute의 modifyContentBean 객체에

set해서 다시 넣어 줬는데 혹시

바로 modelattribute의 modifyContentBean 객체

modifyContentBean  = boardService.getContentInfo(content_idx);

이런식으로는 왜안되는지 알고 싶습니다

해보니까 결과값들이 비어있는채로 나오더라구요