JSP Cookie

<%
    Cookie cookie = new Cookie("쿠키이름", "쿠키값")   //쿠키 정보를 담고 있는 Cookie객체 생성
    response.addCookie(cookie)                         //쿠키 추가, 웹브라우저에 쿠키전송
%>

<%
    Cookie[] cookies = request.getCookies();
%>

<%
    Cookie[] cookies = request.getCookies();            //쿠키의 값 읽어오기

    if(cookies != null && cookies.length > 0){          //쿠키값 null 처리
        for(int i=0 ; i<cookies.length ; i++){          //배열로 들어오는 쿠키 for문으로 출력
    %>    
            <%= cookies[i].getName() %>                  //쿠키클래스 메서드를 사용해 쿠키 이름 불러오기
            =
            <%= URLDecoder.decode(cookies[i].getValue(),"utf-8") %> <br/> // 메서드로 쿠키 값을 디코딩해서 가져오기
    <%    
        }
    }else{
    %>
        쿠키가 존재하지 않습니다
    <%
    }
%>

<%
    Cookie cookie = new Cookie("name", URLEncoder.encode("새로운 값","utf-8"));
    response.addCookie(cookie);
%>

<%
    Cookie[] cookies = request.getCookies();              //쿠키 전체를 가져오기

    if(cookies != null && cookies.length > 0){          
        for(int i=0 ; i<cookies.length ; i++){          
            if(cookies[i].getName().equals("name")){      //쿠키들 중 쿠키이름이 내가 지정한 이름과 같은 쿠키의 존재 여부를 확인
                Cookie cookie = new Cookie(name, value);  //맞다면 새로 생성해 변경
                response.addCookie(cookie);
            }
         }
    }
>%

<%
    Cookie cookie = new Cookie("name", "");
    cookie.setMaxAge(0)
%>

<%
    Cookie[] cookies = request.getCookies();           

    if(cookies != null && cookies.length > 0){          
        for(int i=0 ; i<cookies.length ; i++){          
            if(cookies[i].getName().equals("name")){   
                Cookie cookie = new Cookie(name, "");  
                cookie.setMaxAge(0);                    //쿠키 삭제하기
                response.addCookie(cookie);
            }
         }
    }
>%

<h3>쿠키값 전체 삭제하기</h3>

<% 
	Cookie[] cookies = request.getCookies();
	if(cookies != null && cookies.length>0 ){
		for(int i=0;i<cookies.length;i++){
			Cookie cookie = new Cookie(cookies[i].getName(), "");
			cookie.setMaxAge(0);
			response.addCookie(cookie);
		}
	}
%>

name 쿠키값을 삭제했습니다

<%
    Cookie cookie1 = new Cookie("id", "sohayng");
    cookie1.setDomain("anonymous.com");
    response.addCookie(cookie1);
%>

<%

Cookie cookie1 = new Cookie("id", "cookie1_value");   //도메인이 anonymous.com인 id 쿠키를 추가
cookie1.setDomain("anonymous.com");
response.addCookie(cookie1);

Cookie cookie2 = new Cookie("only", "cookie2_value");  // 도메인을 설정하지 않은 only 쿠키 추가
response.addCookie(cookie2);

Cookie cookie3 = new Cookie("invalid", "cookie3_value");   //도메인이 www.daum.net인 invalid 쿠키 추가
cookie3.setDomain("www.daum.net");
response.addCookie(cookie3);

%>

<p>생성된 쿠키 이름 = 쿠키 값 [ 쿠키 도메인 ]</p>
<%= cookie1.getName() %> = <%= cookie1.getValue() %> [<%= cookie1.getDomain() %>]<br>
<%= cookie2.getName() %> = <%= cookie2.getValue() %> [<%= cookie2.getDomain() %>]<br>
<%= cookie3.getName() %> = <%= cookie3.getValue() %> [<%= cookie3.getDomain() %>]<br> //웹브라우저에 저장되지 않음

<%
    Cookie cookie1 = new Cookie("name", "value");
    cookie.setPath(경로);
%>

<%@ page import="java.net.URLEncoder"%>
...

<h3>쿠키경로 지정하기</h3>

<%
    Cookie cookie1 = new Cookie("path1", URLEncoder.encode("경로:/basic/jsp08_cookies/path1", "utf-8"));
    cookie1.setPath("basic/jsp08_cookies/path1");
    response.addCookie(cookie1);

    Cookie cookie2 = new Cookie("path2", URLEncoder.encode("경로:", "utf-8"));
    response.addCookie(cookie2);

    Cookie cookie3 = new Cookie("path3", URLEncoder.encode("경로:/", "utf-8"));
    cookie3.setPath("/");
    response.addCookie(cookie3);

    Cookie cookie4 = new Cookie("path4", URLEncoder.encode("경로:/basic/jsp08_cookies/path2", "utf-8"));
    cookie4.setPath("basic/jsp08_cookies/path2");
    response.addCookie(cookie4);
%>

<p>쿠키이름 = 쿠키 값 [쿠키 경로]</p>
<%= cookie1.getName() %> = <%=cookie1.getValue() %> [<%= cookie1.getPath() %>] <br>
<%= cookie2.getName() %> = <%=cookie2.getValue() %> [<%= cookie2.getPath() %>] <br>
<%= cookie3.getName() %> = <%=cookie3.getValue() %> [<%= cookie3.getPath() %>] <br>
<%= cookie4.getName() %> = <%=cookie4.getValue() %> [<%= cookie4.getPath() %>] <br>

<%
    Cookie cookie = new Cookie("time", "1hour");
    cookie.setMaxAge(초단위 시간); 
    response.addCookie(cookie);
%>

<%
    Cookie cookie = new Cookie("time", "1hour");
    cookie.setMaxAge(60*60);        // 60초 * 60분 = 1시간
    response.addCookie(cookie);
%>

<%@ page import="com.lec.cookie.Cookies"%>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
   <meta charset="UTF-8">
</head>
<body>

	<h3>java클래스로 Cookie생성하기</h3>

	<%
	response.addCookie(Cookies.createCookie("cookieName1", "쿠키값1"));
	response.addCookie(Cookies.createCookie("cookieName2", "쿠키값2", "/", -1));
	response.addCookie(Cookies.createCookie("cookieName3", "쿠키값3", "/", "xxx.com", -1));
	%>

	<p>java클래스 Cookies로 쿠키를 생성했습니다</p>
	
</body>
</html>

<%@ page import="com.lec.cookie.Cookies"%>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
   <meta charset="UTF-8">
</head>
<body>

	<h3>java클래스로 Cookie읽기</h3>
	
	<%
		Cookies cookies = new Cookies(request); //request 기본객체로부터 쿠키 정보를 얻어옴
	%>
	
	<p>cookieName1 쿠키값 : <%= cookies.getValue("cookieName1") %></p>
	<% if (cookies.exists("cookieName2")){ %>    <!--쿠키가 존재하는지 확인-->
	<p>cookieName2 쿠키값 : <%= cookies.getValue("cookieName2") %></p>
	<%} %>
	<% if (cookies.exists("cookieName3")){ %>   <!--값만 사용할 경우 getValue 메서드 사용 (쿠키를 가져올수도 있음)-->
	<p>cookieName3 쿠키값 : <%= cookies.getValue("cookieName3") %></p>
	<%} %>
	
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
   <meta charset="UTF-8">
</head>
<body>
	<form action="<%= request.getContextPath() %>/jsp08_cookies/jsp08_09_login.jsp" method="post">
		<p>아이디 : <input type="text" name="id" size="10" /></p>
		<p>비밀번호 : <input type="password" name="pw" size="10" /></p>
		<p><input type="submit" value="로그인"/></p>
	</form>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="com.lec.cookie.Cookies"%>
<%
	String id = request.getParameter("id");
	String password = request.getParameter("pw");

	if(id.equals(password)){
		//id와 password가 같으면 로그인에 성공
		response.addCookie(
			Cookies.createCookie("AUTH", id, "/", -1)
		);
%>
		<!DOCTYPE html>
		<html>
		<head>
		   <meta charset="UTF-8"> 
		</head>
		<body>
		<form action="<%= request.getContextPath() %>/jsp08_cookies/jsp08_09_logout.jsp">
			<p>로그인에 성공했습니다</p>
			<input type="submit" value="로그아웃"/>
		</form>
		</body>
		</html>
<% } else { %>
	<script>
		alert("로그인에 실패했습니다");
		history.go(-1);
	</script>
<% } %>

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="com.lec.cookie.Cookies"%>
<!DOCTYPE html>
<html>
<head>
   <meta charset="UTF-8">
</head>
<body>
	<h2>로그인 여부 검사</h2>
	
	<%
	Cookies cookies = new Cookies(request); //request 기본객체로부터 쿠키 정보를 얻어옴
	if(cookies.exists("AUTH")){
	%>
		<p>아이디 "<%= cookies.getValue("AUTH")%>"로 로그인한 상태 </p>
	<%
	} else {
	%>
		<p>로그인하지 않은 상태</p>
	<%
	}
	%>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="com.lec.cookie.Cookies"%>
<!DOCTYPE html>
<html>
<head>
   <meta charset="UTF-8">
</head>
<body>

<%
	response.addCookie(Cookies.createCookie("AUTH", "", "/", 0));
%>

<p>로그아웃 했습니다</p>

</body>
</html>