게시판 - webstudy-board - 로그인/로그아웃

서나브로 2019. 8. 11. 02:44

1. Template

1) WebContent - view - template - sidebar.jsp 수정

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <c:choose> <c:when test="${sessionScope.clientDTO==null}">  <div class="card"> <h3>로그인</h3> <form method="post" action="${pageContext.request.contextPath}/DispatcherServlet"> <input type="hidden" name="command" value="login"> <p>아이디 <input type="text" name="clientId" placeholder="아이디" size="12"></p> <p>패스워드 <input type="password" name="clientPassword" placeholder="비밀번호" size="12"></p> <input type="submit" value="로그인"> <a href="${pageContext.request.contextPath}/DispatcherServlet?command=registerPage">회원가입</a></p> </form> </div> </c:when> <c:otherwise> <div class="card"> <p>${sessionScope.clientDTO.clientName}님 반갑습니다.</p> <p><a href="${pageContext.request.contextPath}/DispatcherServlet?command=logout">로그아웃</a></p> <p><a href="#">회원수정</a></p> <p><a href="#">회원탈퇴</a></p> <p><a href="${pageContext.request.contextPath}/index.jsp">홈으로</a> </p> </div>  <div class="card"> <h3>게시판</h3> <a href="#">게시판 보기</a> </div> </c:otherwise> </c:choose>

2. View

1) WebContent - view - member - login_result.jsp 추가

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>  <c:if test="${sessionScope.clientDTO==null}"> <script lang="javascript"> alert('아이디가 없거나 패스워드가 맞지 않아 로그인에 실패하셨습니다.'); location.href='http://localhost:8080/webstudy-board/'; </script> </c:if>  <c:if test="${sessionScope.clientDTO!=null}"> <script lang="javascript"> var name='${sessionScope.clientDTO.clientName}'; alert(name+'님 안녕하세요'); location.href='http://localhost:8080/webstudy-board/'; </script> </c:if>

3. Model

1) src - model.ClientDAO.java에 login 로그인 메소드 추가

public ClientDTO login(ClientDTO clientDTO) throws SQLException { ClientDTO resultDTO=null; Connection con=null; PreparedStatement pstmt=null; ResultSet rs=null; try { con=getConnection(); String sql="select clientId,clientName from client where clientId=? and clientPassword=?"; pstmt=con.prepareStatement(sql); pstmt.setString(1, clientDTO.getClientId()); pstmt.setString(2, clientDTO.getClientPassword()); rs=pstmt.executeQuery(); if(rs.next()) resultDTO=new ClientDTO(rs.getString(1), null, rs.getString(2), null, null, null); }finally { closeAll(rs, pstmt, con); } return resultDTO; }

2) src - test.TestLogin.java 추가(login 메소드 테스트)

package test; import model.ClientDAO; import model.ClientDTO; public class TestLogin { public static void main(String[] args) { String clientId="xiumin"; String clientPassword="exo1234"; try { ClientDTO clientDTO=ClientDAO.getInstance().login(new ClientDTO(clientId,clientPassword,null,null,null,null)); System.out.println(clientDTO); } catch (Exception e) { e.printStackTrace(); } } }

4. Controller

1) src - controller.HandlerMapping.java에 login, logout command 추가;

else if(command.equals("login")) //로그인 c=new LoginController(); else if(command.equals("logout")) //로그아웃 c=new LogoutController();

2) src - controller.LoginController.java 추가

package controller; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import model.ClientDAO; import model.ClientDTO; public class LoginController implements Controller { @Override public String execute(HttpServletRequest request, HttpServletResponse response) throws Exception { String clientId=request.getParameter("clientId"); String clientPassword=request.getParameter("clientPassword"); ClientDTO clientDTO=ClientDAO.getInstance().login(new ClientDTO(clientId,clientPassword,null,null,null,null)); HttpSession session=request.getSession(); session.setAttribute("clientDTO", clientDTO); return "redirect:view/member/login_result.jsp"; } }

3) src - controller.LogoutController.java 추가

package controller; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; public class LogoutController implements Controller { @Override public String execute(HttpServletRequest request, HttpServletResponse response) throws Exception { HttpSession session = request.getSession(false); if(session!=null) session.invalidate(); return "redirect:index.jsp"; } }