JSP 게시판 만들기 - joinAction.jsp (2020.08.27 완성)

userID 세션값을 사용하여 로그인이 된 유저는 로그인이나 회원가입 페이지에 들어오지 못하게 해주었습니다.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
 
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import="board.UserDAO"%>
<%@ page import="java.io.PrintWriter"%>
<%
    request.setCharacterEncoding("UTF-8");
%>
<jsp:useBean id="board" class="board.Board" scope="page" />
<jsp:setProperty name="board" property="userID" />
<jsp:setProperty name="board" property="userPassword" />
<jsp:setProperty name="board" property="userName" />
<jsp:setProperty name="board" property="userGender" />
<jsp:setProperty name="board" property="userEmail" />
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<!-- 뷰포트 -->
<meta name="viewport" content="width=device-width" initial-scale="1">
<title>프로젝트 게시판 웹사이트</title>
 
</head>
 
<body>
 
    <%
        String userID = null; //로그인이 된 유저는 로그인, 회원가입 페이지에 못들어오게 해야함
    if (session.getAttribute("userID") != null) {
        userID = (String) session.getAttribute("userID"); //해당 세션값 넣어줌 
    }
    if (userID != null) {
        PrintWriter script = response.getWriter();
        script.println("<script>");
        script.println("alert('이미 로그인이 되어 있습니다.')");
        script.println("location.href='main.jsp'"); //이미 로그인이 되면 또 로그인 못하게 해줌
        script.println("</script>");
    }
    if (board.getUserID() == null || board.getUserPassword() == null || board.getUserName() == null
            || board.getUserGender() == null || board.getUserEmail() == null) {
        PrintWriter script = response.getWriter();
        script.println("<script>");
        script.println("alert('입력이 되지 않은 사항이 있습니다.')");
        script.println("history.back()"); //이전 페이지 즉 로그인페이지로 돌아가게 만듬
        script.println("</script>");
    } else {
        UserDAO userDAO = new UserDAO();
        int result = userDAO.join(board); //각 변수를 입력받은걸 가지고 만들어진 하나의 board라는 인스턴스가 join함수를 수행하도록 매개변수로 들어감
        if (result == -1) {
            PrintWriter script = response.getWriter();
            script.println("<script>");
            script.println("alert('이미 존재하는 아이디입니다.')");
            script.println("history.back()"); //이전 페이지 즉 로그인페이지로 돌아가게 만듬
            script.println("</script>");
        } else {
            session.setAttribute("userID", board.getUserID());
            PrintWriter script = response.getWriter();
            script.println("<script>");
            script.println("location.href='main.jsp'");
            script.println("</script>");
        }
    }
    %>
 
</body>
 
</html>
 
Colored by Color Scripter
cs