[JSP 공부 5일차] 세션

햅2024 2024. 11. 26. 19:59

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>JSP</title>
</head>
<body>
	<h1>JSP Examples</h1>
	<hr>
	<a href="11_session.jsp">Session</a><br>			
</body>
</html>

11_session.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Session Login</title>
</head>
<body>
<%
	String userid = "";
    
    //이미 로그인 된 경우
	if(session.getAttribute("userid") != null){
		System.out.println("[getSession] Login OK");
		userid = (String)session.getAttribute("userid");
		
		// 환영 인사
%>
		<h1><%=userid%>님 반값습니다.</h1>
		<h1>회비는 29만원 입니다.</h1>
<% 
	}	
	
    //로그인을 해야 될 경우
	else{
%>
	<form name="loginForm" method="post" action="11_session_ok.jsp">
		<fieldset>
			<legend>Login Info.</legend>
			id : <input type="text" name="userid"><br>
			pw : <input type="password" name="passwd"><br>
			<input type="button" value="login" onclick="sendIt()">
		</fieldset>
	</form>
<% 
	}
%>
</body>
<script>
	var frm = document.loginForm;
	
	function sendIt()
	{
		if(frm.userid.value == ''){
			alert("이름을 입력하세요");
			return false;
		}
		
		if(frm.passwd.value == ''){
			alert("비밀번호를 입력하세요");
			return flase;
		}
		
		frm.submit();
	}
</script>
</html>

11_session_ok.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Session Login</title>
</head>
<body>
<%
	String userid = request.getParameter("userid");
	String passwd = request.getParameter("passwd");
	
	//user id : Apple, passwd : 111 인 것만 인정
	if(userid.equals("Apple") && passwd.equals("111"))
	{
		//session에 저장
		session.setAttribute("userid", userid);
		response.sendRedirect("11_session.jsp");
	}
	else{
%>
		<script>
			alert("너 누구야");
			location.href = "11_session.jsp";
		</script>
<%
	}
%>		


</body>
</html>