[ch05] 5.6, Used the data of HttpSession.

Signed-off-by: Dongho Sim <dhsim86@gmail.com>
dhsim86 · Mar 11, 2017 · a53bb38 · a53bb38
1 parent 7e0cbaf
commit a53bb38
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diff --git a/src/main/java/Lesson05/LoginServlet.java b/src/main/java/Lesson05/LoginServlet.java
@@ -0,0 +1,82 @@
+package Lesson05;
+
+import javax.servlet.RequestDispatcher;
+import javax.servlet.ServletContext;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+import java.io.IOException;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+/**
+ * Created by Dongho on 2017. 3. 11..
+ */
+@WebServlet("/auth/login")
+public class LoginServlet extends HttpServlet {
+
+    @Override
+    protected void doGet(
+        HttpServletRequest request, HttpServletResponse response
+    ) throws ServletException, IOException {
+        RequestDispatcher rd = request.getRequestDispatcher(
+            "/Lesson05/LogInForm.jsp"
+        );
+        rd.forward(request, response);
+    }
+
+    @Override
+    protected void doPost(
+        HttpServletRequest request, HttpServletResponse response
+    ) throws ServletException, IOException {
+
+        Connection conn = null;
+        PreparedStatement stmt = null;
+        ResultSet rs = null;
+
+        try {
+
+            ServletContext sc = this.getServletContext();
+            conn = (Connection)sc.getAttribute("conn");
+
+            stmt = conn.prepareStatement(
+                "select mname, email from members" +
+                " where email = ? and pwd = ?"
+            );
+
+            stmt.setString(1, request.getParameter("email"));
+            stmt.setString(2, request.getParameter("password"));
+
+            rs = stmt.executeQuery();
+
+            if (rs.next()) {
+                Member member = new Member()
+                    .setEmail(rs.getString("email"))
+                    .setName(rs.getString("mname"));
+
+                HttpSession session = request.getSession();
+                session.setAttribute("member", member);
+
+                response.sendRedirect("../member/list");
+            }
+            else {
+                RequestDispatcher rd = request.getRequestDispatcher(
+                    "/Lesson05/LogInFail.jsp"
+                );
+                rd.forward(request, response);
+            }
+        }
+        catch (Exception e) {
+
+            throw new ServletException(e);
+        }
+        finally {
+            try { if (rs != null) rs.close(); } catch (Exception e) {}
+            try { if (stmt != null) stmt.close(); } catch (Exception e) {}
+        }
+    }
+}
diff --git a/src/main/java/Lesson05/LogoutServlet.java b/src/main/java/Lesson05/LogoutServlet.java
@@ -0,0 +1,27 @@
+package Lesson05;
+
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpSession;
+import java.io.IOException;
+
+/**
+ * Created by Dongho on 2017. 3. 11..
+ */
+@WebServlet("/auth/logout")
+public class LogoutServlet extends HttpServlet {
+
+    @Override
+    protected void doGet(
+        HttpServletRequest request, HttpServletResponse response
+    ) throws ServletException, IOException {
+
+        HttpSession session = request.getSession();
+        session.invalidate();
+
+        response.sendRedirect("login");
+    }
+}
diff --git a/src/main/webapp/Lesson05/Header.jsp b/src/main/webapp/Lesson05/Header.jsp
@@ -6,7 +6,17 @@
   To change this template use File | Settings | File Templates.
 --%>
 <%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<%@ page import="Lesson05.Member" %>
+<%
+    Member member = (Member)session.getAttribute("member");
+%>
 <!DOCTYPE html>
 <div style="background-color:#00008B; color:#FFFFFF; height:20px; padding:5px;">
     SPMS(Simple Project Management System)
+
+    <span style="float:right;">
+        <%=member.getName()%>
+        <a style="color:white;"
+           href="<%=request.getContextPath()%>/auth/logout">Logout</a>
+    </span>
 </div>
diff --git a/src/main/webapp/Lesson05/LogInFail.jsp b/src/main/webapp/Lesson05/LogInFail.jsp
@@ -0,0 +1,18 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: Dongho
+  Date: 2017. 3. 11.
+  Time: PM 4:59
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<!DOCTYPE html>
+<html>
+    <meta http-equiv="refresh" content="1;url=login">
+<head>
+    <title>Login Failure</title>
+</head>
+<body>
+    <p> Login Failure, Email or password is incorrect. Retry after a while.</p>
+</body>
+</html>
diff --git a/src/main/webapp/Lesson05/LogInForm.jsp b/src/main/webapp/Lesson05/LogInForm.jsp
@@ -0,0 +1,23 @@
+<%--
+  Created by IntelliJ IDEA.
+  User: Dongho
+  Date: 2017. 3. 11.
+  Time: PM 4:56
+  To change this template use File | Settings | File Templates.
+--%>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Login</title>
+</head>
+<body>
+    <h2>User Login</h2>
+    <form action="login" method="post">
+        email: <input type="text" name="email"><br>
+        password: <input type="password" name="password"><br>
+
+        <input type="submit" value="Login">
+    </form>
+</body>
+</html>