스프링부트 강좌 55강(블로그 프로젝트) - 글목록 페이징하기

출처:

https://www.youtube.com/watch?v=y3ABMs9pieg&list=PL93mKxaRDidECgjOBjPgI3Dyo8ka6Ilqm&index=57 

---

Sort할때 자동으로 임포트가 안 떠서 어리둥절 했음.

 

import org.springframework.data.domain.Sort;

 

26행 List타입을 Page타입으로 바꿈

URL바꿔보니 여기 number값이 바뀌는 걸 보고

href="?page=${boards.number-1}" 값 넣음

package com.cosblog.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;

import com.cosblog.service.BoardService;

import org.springframework.data.domain.Sort;




@Controller
public class BoardController {
	
	@Autowired
	private BoardService boardService;
	
	//public String index(@AuthenticationPrincipal PrincipalDetail principal)
	
	@GetMapping({"","/"})
	public String index(Model model,@PageableDefault(size=3, sort="id", direction = Sort.Direction.DESC)Pageable pageable) {
		model.addAttribute("boards", boardService.글목록(pageable));
		return "index"; // viewResolver 작동!
	}
	
	@GetMapping("/board/saveForm")
	public String saveForm() {
		
		return "board/saveForm";
	}
}

 

package com.cosblog.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.cosblog.model.Board;
import com.cosblog.model.User;
import com.cosblog.repository.BoardRepository;

//스프링이 컴포넌트 스캔을 통해서 bean에 등록을 해줌
@Service
public class BoardService {

	@Autowired
	private BoardRepository boardRepository;

	@Transactional
	public void 글쓰기(Board board, User user) {
		board.setCount(0);
		board.setUser(user);
		boardRepository.save(board);
	}

	public Page<Board> 글목록(Pageable pageable) {
		return boardRepository.findAll(pageable);
	}

	/*
	 * 이 로그인도 사용 안 할거라 삭제
	 * 
	 * @Transactional(readOnly = true)//Select할 때 트랜잭션 시작, 서비스 종료시에 트랜잭션 종료(정합성)
	 * public User 로그인(User user) { return
	 * userRepository.findByUsernameAndPassword(user.getUsername(),
	 * user.getPassword()); }
	 */
}

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ include file="layout/header.jsp"%>

<div class="container">
	<c:forEach var="board" items="${boards.content}">
		<div class="card m-2">
			<div class="card-body">
				<h4 class="card-title">${board.title}</h4>
				<a href="#" class="btn btn-primary">상세보기</a>
			</div>
		</div>
	</c:forEach>

	<ul class="pagination justify-content-center">
		<c:choose>
			<c:when test="${boards.first}">
				<li class="page-item disabled"><a class="page-link" href="?page=${boards.number-1}">Previous</a></li>
			</c:when>
			<c:otherwise>
				<li class="page-item"><a class="page-link" href="?page=${boards.number-1}">Previous</a></li>
			</c:otherwise>
		</c:choose>

		<c:choose>
			<c:when test="${boards.last}">
				<li class="page-item disabled"><a class="page-link" href="?page=${boards.number+1}">Next</a></li>
			</c:when>
			<c:otherwise>
				<li class="page-item"><a class="page-link" href="?page=${boards.number+1}">Next</a></li>
			</c:otherwise>
		</c:choose>

	</ul>
</div>


<%@ include file="layout/footer.jsp"%>