[spring blog]5. 상세페이지

@GetMapping("/board/1")
    public String detail() {
        return "board/detail";
    }

@GetMapping("/board/{id}")
    public String detail(@PathVariable int id) {
        System.out.println("id : "+id);
        return "board/detail";

<div class="d-flex justify-content-end mt-2">
        <b>작성자</b> : ssar
    </div>

package shop.mtcoding.blog.board;

import lombok.Data;

import java.sql.Timestamp;

public class BoardResponse {
    // bt.id, bt.content, bt.title, bt.created_at, ut.id uid, ut.username
    @Data
    public static class DetailDTO {

            private int id;
            private String title;
            private String content;
            private int userId;
            private String username;
            private Timestamp createdAt;
       }
    }

public BoardResponse.DetailDTO findById(int id) {
        // Entity가 아닌것은 jpa가 파싱 안해준다.
        Query query = em.createNativeQuery("select bt.id, bt.content, bt.title, bt.created_at, ut.user_id uid, ut.username from board_tb bt inner join user_tb ut on bt.user_id = ut.id where bt.id = ?");
        query.setParameter(1, id);

        JpaResultMapper rm = new JpaResultMapper();
        BoardResponse.DetailDTO responseDTO = rm.uniqueResult(query, BoardResponse.DetailDTO.class);
        return responseDTO;
    }
}

@GetMapping("/board/{id}")
    public String detail(@PathVariable int id, HttpServletRequest request) {

      BoardResponse.DetailDTO responseDTO = boardRepository.findById(id);
      request.setAttribute("board", responseDTO);
        return "board/detail";
    }

</div>

    <div class="d-flex justify-content-end mt-2">
        <b>작성자</b> : {{board.username}}
    </div>

public BoardResponse.DetailDTO findById(int id) {
        // Entity가 아닌것은 jpa가 파싱 안해준다.
        Query query = em.createNativeQuery("select bt.id, bt.title, bt.content, bt.created_at, ut.username from board_tb bt inner join user_tb ut on bt.user_id = ut.id where bt.id = ?");
        query.setParameter(1, id);

        JpaResultMapper rm = new JpaResultMapper();
        BoardResponse.DetailDTO responseDTO = rm.uniqueResult(query, BoardResponse.DetailDTO.class);
        return responseDTO;
    }

public static class DetailDTO {

            private Integer id;
            private String title;
            private String content;
            private Timestamp createdAt;
            private Integer userId;
            private String username;

       }

// 해당 페이지의 주인 여부
        boolean owner = false;

        // 작성자 userId 확인하기
        int boardUserId = responseDTO.getUserId();

        // 로그인 여부 체크
        User sessionUser = (User) session.getAttribute("sessionUser");
        if (sessionUser != null ) { // 로그인 했음
            if(boardUserId == sessionUser.getId()) {
                owner = true;
            }
        }


        request.setAttribute("owner", owner);

        return "board/detail";