게시판 검색기능 넣는 방법

페이징 기능이 구현된 상태에서 검색 기능을 구현되게 만들기
페이지가 바뀌어도 검색 텍스트를 유지할 수 있다.

Repository

@Query(value = "SELECT * FROM board WHERE title LIKE %:searchText% or content LIKE %:searchText%", nativeQuery = true)
 	Page<Board> findByTitleOrContent(String searchText, Pageable page);

Service

public Page<Board> 게시글목록보기(Pageable page, String searchText) {
 	return boardRepository.findByTitleOrContent(searchText, page);
 }

Controller

// 게시글 목록보기 
@GetMapping("/board")
public String home(Model model, 
	@PageableDefault(page = 0, size = 3, sort = "id", direction = Sort.Direction.DESC) Pageable page,
 	@RequestParam(required = false, defaultValue = "") String searchText) {
 	Page<Board> boardsEntity = boardRepository.findByTitleOrContent(searchText, page);
 	int startPage = Math.max(1, boardsEntity.getPageable().getPageNumber() - 4);
 	int endPage = Math.min(boardsEntity.getTotalPages(), boardsEntity.getPageable().getPageNumber() + 4);
 	int nowPage = boardsEntity.getPageable().getPageNumber() + 1;
 	model.addAttribute("startPage", startPage);
 	model.addAttribute("endPage", endPage);
 	model.addAttribute("nowPage", nowPage);
 	model.addAttribute("boardsEntity", boardService.게시글목록보기(page, searchText));
    
 	return "board/list";
 	}

html

// 검색창
<form class="row g-3 d-fex justify-content-end" >
	<div class="col-auto">
		<input type="text" class="form-control" name="searchText" value="${param.searchText}" >
	</div>
	<div class="col-auto">
		<button type="submit" class="btn btn-primary mb-3">검색</button>
	</div>
</form>

// ...게시글 리스트 생략...

// 페이징
<ul class="pagination d-flex justify-content-center">
		<c:choose>
			<c:when test="${boardsEntity.first}">
				<li class="page-item disabled"><a class="page-link"
					href="/board?page=${boardsEntity.number - 1}&searchText=${param.searchText}">Prev</a></li>
			</c:when>
			<c:otherwise>
				<li class="page-item"><a class="page-link"
					href="/board?page=${boardsEntity.number - 1}&searchText=${param.searchText}">Prev</a></li>
			</c:otherwise>
		</c:choose>


		<c:forEach begin="${startPage}" end="${endPage}" var="idx">
			<c:choose>
				<c:when test="${idx eq nowPage}">
					<li class="page-item disabled"><a
						class="page-link page-active" href="/board?page=${idx-1}&searchText=${param.searchText}">${idx}</a></li>
				</c:when>
				<c:otherwise>
					<li class="page-item"><a class="page-link"
						href="/board?page=${idx-1}&searchText=${param.searchText}">${idx}</a></li>
				</c:otherwise>
			</c:choose>
		</c:forEach>

		<c:choose>
			<c:when test="${boardsEntity.last}">
				<li class="page-item disabled"><a class="page-link"
					href="/board?page=${param.page + 1}&searchText=${param.searchText}">Next</a></li>
			</c:when>

			<c:otherwise>
				<li class="page-item"><a class="page-link"
					href="/board?page=${param.page + 1}&searchText=${param.searchText}">Next</a></li>
			</c:otherwise>
		</c:choose>
	</ul>