[게시판] 글 목록 출력하기(Read)

1. list.html

<main class="container">
    <div class="bg-light p-5 rounded">
        <h1>게시판</h1>
        <div>총건수 : <span th:text = "${#lists.size(boards)}"></span></div>

        <table class="table table-striped">
            <thead>
            <tr>
                <th scope="col">번호</th>
                <th scope="col">제목</th>
                <th scope="col">작성자</th>
            </tr>
            </thead>
            <tbody>
            <tr th:each="board : ${boards}">
                <td th:text="${board.id}">Mark</td>
                <td th:text="${board.title}">Otto</td>
                <td  th:text="${board.content}">@mdo</td>
            </tr>
            </tbody>
        </table>
        <div class = "text-right">
          <a type="button" class="btn btn-primary" th:href="@{/board/form}">쓰기</a>
        </div>
    </div>
</main>

2. BoardController.java

 @GetMapping("/list")
     public String list(Model model){ //파라메터값을 넘겨주고싶다면 model

         List<Board> boards = boardRepositoryJPA.findAll();
         model.addAttribute("boards",boards);
         return "board/list";
     }

 

3.BoardRepositoryJPA

@Repository
public class BoardRepositoryJPA {

    private final EntityManager em;

    @Autowired
    public BoardRepositoryJPA(EntityManager em) {
        this.em = em;
    }
    

    public List<Board> findAll() {
        List<Board> result = em.createQuery("select m from Board m",Board.class).
                getResultList();
        return result;
    }
}

 

4.Board

@Data   //getter,setter를 lombok을 이용하여 외부에서 꺼내쓸 수 있게
@Entity //db연결을 위한 model클래스임을 알림.
public class Board {  //table 이름과 같아야 한다.
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;
    private String title;
    private String content;
}