jspblog : user login/logout

jspblog/pom.xml

@@ -54,6 +54,12 @@
             <artifactId>gson</artifactId>
             <version>2.8.6</version>
         </dependency>
+
+        <dependency>
+            <groupId>javax.servlet</groupId>
+            <artifactId>jstl</artifactId>
+            <version>1.2</version>
+        </dependency>
     </dependencies>
 
     <build>

jspblog/src/main/java/com/example/jspblog/domain/user/UserDao.java

@@ -2,6 +2,7 @@ package com.example.jspblog.domain.user;
 
 import com.example.jspblog.config.DB;
 import com.example.jspblog.domain.user.dto.JoinReqDto;
+import com.example.jspblog.domain.user.dto.LoginReqDto;
 
 import java.sql.Connection;
 import java.sql.PreparedStatement;
@@ -36,10 +37,6 @@ public class UserDao {
 
     }
 
-    public void usernameCheck() { // 아이디 중복 체크
-
-    }
-
     public void findById() { // 회원정보보기
 
     }
@@ -66,4 +63,35 @@ public class UserDao {
         }
         return -1;
     }
+
+    public User findByUsernameAndPassword(LoginReqDto dto) {
+        String sql = "select id, username, email, address from user where username=? and password=?";
+
+        Connection conn = DB.getConnection();
+        PreparedStatement pstmt = null;
+        ResultSet rs = null;
+
+        if (conn != null) {
+            try {
+                pstmt = conn.prepareStatement(sql);
+                pstmt.setString(1, dto.getUsername());
+                pstmt.setString(2, dto.getPassword());
+                rs = pstmt.executeQuery();
+                if (rs.next()) {
+                    return User.builder()
+                            .id(rs.getInt("id"))
+                            .username(rs.getString("username"))
+                            .email(rs.getString("email"))
+                            .address(rs.getString("address"))
+                            .build();
+                }
+            } catch (Exception e) {
+                e.printStackTrace();
+            } finally {
+                DB.close(conn, pstmt, rs);
+            }
+        }
+
+        return null;
+    }
 }

jspblog/src/main/java/com/example/jspblog/service/UserService.java

@@ -18,7 +18,7 @@ public class UserService {
     }
 
     public User 로그인(LoginReqDto dto) {
-        return null;
+        return userDao.findByUsernameAndPassword(dto);
     }
 
     public int 회원수정(UpdateReqDto dto) {

jspblog/src/main/java/com/example/jspblog/web/UserController.java

@@ -1,5 +1,6 @@
 package com.example.jspblog.web;
 
+import com.example.jspblog.domain.user.User;
 import com.example.jspblog.domain.user.dto.JoinReqDto;
 import com.example.jspblog.domain.user.dto.LoginReqDto;
 import com.example.jspblog.service.UserService;
@@ -29,42 +30,61 @@ public class UserController extends HttpServlet {
         String cmd = request.getParameter("cmd");
         UserService userService = new UserService();
 
-        if(cmd.equals("loginForm")) {
+        switch (cmd) {
-            response.sendRedirect("user/loginForm.jsp");
+            case "loginForm":
-        } else if (cmd.equals("login")) {
+                response.sendRedirect("user/loginForm.jsp");
-            String username = request.getParameter("username");
+                break;
-            String password = request.getParameter("password");
+            case "login": {
-            LoginReqDto dto = new LoginReqDto();
+                String username = request.getParameter("username");
-            dto.setUsername(username);
+                String password = request.getParameter("password");
-            dto.setPassword(password);
+                LoginReqDto dto = new LoginReqDto();
-            userService.로그인(dto);
+                dto.setUsername(username);
-        } else if (cmd.equals("joinForm")) {
+                dto.setPassword(password);
-            response.sendRedirect("user/joinForm.jsp");
+                User userEntity = userService.로그인(dto);
-        } else if (cmd.equals("join")) {
+                if (userEntity != null) {
-            String username = request.getParameter("username");
+                    request.getSession().setAttribute("principal", userEntity);
-            String password = request.getParameter("password");
+                    response.sendRedirect("index.jsp");
-            String email = request.getParameter("email");
+                } else {
-            String address = request.getParameter("address");
+                    Script.back(response, "로그인 실패");
-            JoinReqDto dto = new JoinReqDto();
+                }
-            dto.setUsername(username);
+                break;
-            dto.setPassword(password);
-            dto.setEmail(email);
-            dto.setAddress(address);
-            int result = userService.회원가입(dto);
-            if (result == 1) {
-                response.sendRedirect("index.jsp");
-            } else {
-                Script.back(response, "회원가입실패");
             }
-        } else if (cmd.equals("usernameCheck")) {
+            case "joinForm":
-            BufferedReader br = request.getReader();
+                response.sendRedirect("user/joinForm.jsp");
-            String username = br.readLine();
+                break;
-            int result = userService.유저네임중복체크(username);
+            case "join": {
-            PrintWriter out = response.getWriter();
+                String username = request.getParameter("username");
-            if (result == 1) {
+                String password = request.getParameter("password");
-                out.print("ok");
+                String email = request.getParameter("email");
-            } else {
+                String address = request.getParameter("address");
-                out.print("fail");
+                JoinReqDto dto = new JoinReqDto();
+                dto.setUsername(username);
+                dto.setPassword(password);
+                dto.setEmail(email);
+                dto.setAddress(address);
+                int result = userService.회원가입(dto);
+                if (result == 1) {
+                    response.sendRedirect("index.jsp");
+                } else {
+                    Script.back(response, "회원가입실패");
+                }
+                break;
+            }
+            case "usernameCheck": {
+                BufferedReader br = request.getReader();
+                String username = br.readLine();
+                int result = userService.유저네임중복체크(username);
+                PrintWriter out = response.getWriter();
+                if (result == 1) {
+                    out.print("ok");
+                } else {
+                    out.print("fail");
+                }
+                break;
+            }
+            case "logout": {
+                request.getSession().invalidate();
+                response.sendRedirect("index.jsp");
             }
         }
     }

jspblog/src/main/webapp/board/list.jsp

@@ -1,6 +1,9 @@
 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 
 <%@ include file="../layout/header.jsp"%>
+
+<h1>세션 테스트</h1>
+로그인 유저네임 : ${sessionScope.principal.username}
 </body>
 </html>
 

jspblog/src/main/webapp/layout/header.jsp

@@ -1,4 +1,6 @@
 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+
 <!DOCTYPE html>
 <html lang="en">
 <head>
@@ -13,20 +15,40 @@
 <body>
 
 <nav class="navbar navbar-expand-md bg-dark navbar-dark">
-    <a class="navbar-brand" href="#">블로그</a>
+    <a class="navbar-brand" href="${pageContext.request.contextPath}/index.jsp">블로그</a>
     <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#collapsibleNavbar">
         <span class="navbar-toggler-icon"></span>
     </button>
-    <div class="collapse navbar-collapse" id="collapsibleNavbar">
+
-        <ul class="navbar-nav">
+    <c:choose>
-            <li class="nav-item">
+        <c:when test="${sessionScope.principal != null}">
-                <a class="nav-link" href="${pageContext.request.contextPath}/user?cmd=joinForm">회원가입</a>
+            <div class="collapse navbar-collapse" id="collapsibleNavbar">
-            </li>
+                <ul class="navbar-nav">
-            <li class="nav-item">
+                    <li class="nav-item">
-                <a class="nav-link" href="${pageContext.request.contextPath}/user?cmd=loginForm">로그인</a>
+                        <a class="nav-link" href="${pageContext.request.contextPath}/board?cmd=writeForm">글쓰기</a>
-            </li>
+                    </li>
-        </ul>
+                    <li class="nav-item">
-    </div>
+                        <a class="nav-link" href="${pageContext.request.contextPath}/user?cmd=updateForm">회원정보</a>
+                    </li>
+                    <li class="nav-item">
+                        <a class="nav-link" href="${pageContext.request.contextPath}/user?cmd=logout">로그아웃</a>
+                    </li>
+                </ul>
+            </div>
+        </c:when>
+        <c:otherwise>
+            <div class="collapse navbar-collapse" id="collapsibleNavbar">
+                <ul class="navbar-nav">
+                    <li class="nav-item">
+                        <a class="nav-link" href="${pageContext.request.contextPath}/user?cmd=joinForm">회원가입</a>
+                    </li>
+                    <li class="nav-item">
+                        <a class="nav-link" href="${pageContext.request.contextPath}/user?cmd=loginForm">로그인</a>
+                    </li>
+                </ul>
+            </div>
+        </c:otherwise>
+    </c:choose>
 </nav>
 <br>
 

jspblog/src/main/webapp/user/loginForm.jsp

@@ -1,5 +1,22 @@
 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
 
 <%@ include file="../layout/header.jsp"%>
+
+<div class="container">
+    <form action="${pageContext.request.contextPath}/user?cmd=login" method="post">
+        <div class="form-group">
+            <label for="username">Username:</label>
+            <input name="username" type="text" class="form-control" placeholder="Enter username" id="username" required>
+        </div>
+
+        <div class="form-group">
+            <label for="pwd">Password:</label>
+            <input name="password" type="password" class="form-control" placeholder="Enter password" id="pwd" required>
+        </div>
+
+        <button type="submit" class="btn btn-primary">로그인</button>
+    </form>
+</div>
+
 </body>
 </html>