[Spring] 드롭다운을 활용해 데이터 받기

1. View

 <div class="container mt-3">
            <div class="dropdown">
                <button type="button" class="btn btn-outline-dark" data-bs-toggle="dropdown">
                    기술을 선택하세요
                </button>
                <ul class="dropdown-menu">
                    <li><a class="dropdown-item" name="keyword" href="?keyword=java">java</a></li>
                    <li><a class="dropdown-item" name="keyword" href="?keyword=javaScript">javasSript</a></li>
                    <li><a class="dropdown-item" name="keyword" href="?keyword=Spring">Spring</a></li>
                    <li><a class="dropdown-item" name="keyword" href="?keyword=HTML">HTML</a></li>
                    <li><a class="dropdown-item" name="keyword" href="?keyword=jQuery">jQuery</a></li>
                    <li><a class="dropdown-item" name="keyword" href="?keyword=MySQL">MySQL</a></li>
                </ul>
            

2. 컨트롤러

    @GetMapping("/resume/listings")
    public String listings(HttpServletRequest request, @RequestParam(defaultValue = "1") int page, @RequestParam(value = "keyword", required = false) String keyword) {
        // 기업 메인 페이지

        if (keyword != null) {
            List<ResumeResponse.ResumeAndUserDTO> responseDTO = resumeRepository.findByResumeAndUser(page, keyword);
            List<ResumeResponse.ResumeAndUserDTO> resumeList = new ArrayList<>();
            for (ResumeResponse.ResumeAndUserDTO dto : responseDTO) {
                if (dto.isEmployer() == false) {
                    resumeList.add(dto);
                }
            }
            request.setAttribute("resumeList", resumeList);

            // 페이지네이션 모듈
            int totalPage = resumeRepository.countIsEmployerFalse();
            ;
            PagingUtil paginationHelper = new PagingUtil(totalPage, page);

            request.setAttribute("nextPage", paginationHelper.getNextPage());
            request.setAttribute("prevPage", paginationHelper.getPrevPage());
            request.setAttribute("first", paginationHelper.isFirst());
            request.setAttribute("last", paginationHelper.isLast());
            request.setAttribute("numberList", paginationHelper.getNumberList());

            return "/resume/listings";

        } else {
            List<ResumeResponse.ResumeAndUserDTO> responseDTO = resumeRepository.findByResumeAndUser(page);
            List<ResumeResponse.ResumeAndUserDTO> resumeList = new ArrayList<>();
            for (ResumeResponse.ResumeAndUserDTO dto : responseDTO) {
                if (dto.isEmployer() == false) {
                    resumeList.add(dto);
                }
            }
            request.setAttribute("resumeList", resumeList);

            // 페이지네이션 모듈
            int totalPage = resumeRepository.countIsEmployerFalse();
            ;
            PagingUtil paginationHelper = new PagingUtil(totalPage, page);

            request.setAttribute("nextPage", paginationHelper.getNextPage());
            request.setAttribute("prevPage", paginationHelper.getPrevPage());
            request.setAttribute("first", paginationHelper.isFirst());
            request.setAttribute("last", paginationHelper.isLast());
            request.setAttribute("numberList", paginationHelper.getNumberList());

            return "/resume/listings";
        }
    }

3. 레파지토리

    public List<ResumeResponse.ResumeAndUserDTO> findByResumeAndUser(int page,String keyword) {
        final int COUNT = 10;
        int value = (page - 1) * COUNT;

        String q = """

            SELECT\s
                r.id, r.user_id, r.title, r.content, r.career,\s
                u.address, u.is_employer, u.name\s
                FROM\s
               resume_tb r\s
               INNER JOIN\s
              user_tb u\s
              ON\s
             r.user_id = u.id\s
            INNER JOIN\s
            skill_tb s\s
            ON\s
            r.id = s.resume_id\s
            WHERE\s
            u.is_employer = false\s
            AND s.skill_name = ?  ORDER BY r.id DESC LIMIT ?,?
            """ ;
        Query query = entityManager.createNativeQuery(q);
        query.setParameter(1,keyword);
        query.setParameter(2, value);
        query.setParameter(3, COUNT);

        List<Object[]> results = query.getResultList();
        List<ResumeResponse.ResumeAndUserDTO> responseDTO = new ArrayList<>();

        for (Object[] result : results) {

            ResumeResponse.ResumeAndUserDTO dto = new ResumeResponse.ResumeAndUserDTO();
            dto.setId((Integer) result[0]);
            dto.setUserId((Integer) result[1]);
            dto.setTitle((String) result[2]);
            dto.setContent((String) result[3]);
            dto.setCareer((String) result[4]);
            dto.setAddress((String) result[5]);
            dto.setEmployer((boolean) result[6]);
            dto.setName((String) result[7]);

            responseDTO.add(dto);
        }
        return responseDTO;
    }

    public List<ResumeResponse.ResumeAndUserDTO> findByResumeAndUser(int page) {
        final int COUNT = 10;
        int value = (page - 1) * COUNT;

        String q = """
                select r.id,r.user_id,r.title,r.content,r.career,u.address,u.is_employer,u.name  from resume_tb r inner join user_tb u on r.user_id = u.id where u.is_employer =false order by id desc limit ?,?;
                """;
        Query query = entityManager.createNativeQuery(q);
        query.setParameter(1, value);
        query.setParameter(2, COUNT);

        List<Object[]> results = query.getResultList();
        List<ResumeResponse.ResumeAndUserDTO> responseDTO = new ArrayList<>();

        for (Object[] result : results) {

            ResumeResponse.ResumeAndUserDTO dto = new ResumeResponse.ResumeAndUserDTO();
            dto.setId((Integer) result[0]);
            dto.setUserId((Integer) result[1]);
            dto.setTitle((String) result[2]);
            dto.setContent((String) result[3]);
            dto.setCareer((String) result[4]);
            dto.setAddress((String) result[5]);
            dto.setEmployer((boolean) result[6]);
            dto.setName((String) result[7]);

            responseDTO.add(dto);
        }
        return responseDTO;
    }

4. 화면에 출력

   {{#resumeList}}
       <tr>
          <td class="div-recommendation-text-2">{{name}}</td>
             <td>
                <div class="div-recommendation-text-1">{{career}}</div>
                <div class="div-recommendation-text-2">{{title}}</div>
               </td>
              <td>
                 <button class="btn btn-outline-body" onclick="location.href='/resume/{{id}}'">이력서보기</button>
              </td>
           </tr>
     {{/resumeList}}