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Cookie 2 ( login) 본문

JAVA/개념정리

Cookie 2 ( login)

inderrom 2022. 12. 6. 03:11

 

cookieMain.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h2>Cookie 연습용 Main페이지 입니다.</h2>

<a href="<%=request.getContextPath()%>/basic/cookie/cookieLogin.jsp">Login창으로 이동</a>

</body>
</html>

cookieLogin.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Login 창</title>
<style>
table {
	border : 1px solid black;
	padding : 15px;
	margin : 10px auto;
}
</style>
<%

	// 서블릿에서 저장한 쿠키값을 가져와 처리하기
	String cookieUserId = "";   // 쿠키에 저장된 userid값이 저장될 변수
	String checkOK = "";

	Cookie[] cookies = request.getCookies();
	if(cookies!=null){
		for(Cookie cookie : cookies){
			if("USERID".equals(cookie.getName())){   // 해당 쿠키가 있을 때...
				cookieUserId = cookie.getValue();   // 쿠키값 구하기 (userid값 구하기)
				checkOK = "checked";
			}
		}
	}

%>


</head>
<body>
<form action="<%=request.getContextPath() %>/cookieLoginServlet.do" method="post">
<table>
<tr>
	<td>ID : </td>
	<td><input type="text" name="userid" value="<%=cookieUserId %>" placeholder="ID를 입력하세요"></td>
</tr>
<tr>
	<td>PASS : </td>
	<td><input type="password" name="pass" placeholder="Password를 입력하세요."></td>
</tr>
<tr>
	<td colspan="2">
		<input type="checkbox" name="chkid" value="check" <%=checkOK %>>id 기억하기
	</td>
</tr>
<tr>
	<td colspan="2" style="text-align:center">
		<input type="submit" value="Login">
	</td>
</tr>
</table>
</form>
</body>
</html>

CookieLoginServlet

package kr.or.ddit.basic.cookie;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/cookieLoginServlet.do")
public class CookieLoginServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		request.setCharacterEncoding("utf-8");
		
		// userid, pass, chkid 정보 받아오기
		String userId = request.getParameter("userid");		// id
		String pass = request.getParameter("pass");			// password
		String chkId = request.getParameter("chkid");		// checkbox
		
		// Cookie객체 생성 ==> 쿠키이름: USERID
		Cookie idCookie = new Cookie("USERID", userId);
		
		// 체크박스의 체크 여부에 따라 쿠키를 저장하거나 삭제한다.
//		if(chkId != null) {		// 체크박스가 체크되었을 때...
//			// 쿠키 저장하기
//			response.addCookie(idCookie);
//		}else {
//			// 쿠키 삭제하기
//			idCookie.setMaxAge(0);  // 유지시간을 0으로
//			response.addCookie(idCookie);
//		}
		
		if(chkId==null) {
			idCookie.setMaxAge(0);
		}
		response.addCookie(idCookie);
		
		// 로그인 성공 여부 검사
		if("test".equals(userId) && "1234".equals(pass)) {  // 로그인 성공
			response.sendRedirect(request.getContextPath() + "/basic/cookie/cookieMain.jsp");
		}else {  // 로그인 실패
			response.sendRedirect(request.getContextPath() + "/basic/cookie/cookieLogin.jsp");
		}
	}

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}

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