index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>index.jsp</title>
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-gH2yIJqKdNHPEq0n4Mqa/HGKIhSkIHeL5AyhkYV8i59U5AR6csBvApHHNl/vI1Bx" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.0/dist/js/bootstrap.bundle.min.js" integrity="sha384-A3rJD856KowSb7dwlZdYEkO39Gagi7vIsF0jrRAoQmDKKtQBHUuLZ9AsSv4jD4Xa" crossorigin="anonymous"></script>
</head>
<body>
<jsp:include page="/test_jstl/navbar.jsp"></jsp:include>
<div class="container">
<!-- 기존 자바 문법 -->
<%
//세션 영역에 id 라는 키값으로 저장된 값이 있는지 읽어와 본다. (없으면 null)
String id=(String)session.getAttribute("id");
%>
<%if(id != null){ %>
<p>
<a href="${pageContext.request.contextPath }/users/private/info.jsp">${id }</a> 님 로그인중...
<a href="${pageContext.request.contextPath }/users/logout.jsp">로그아웃</a>
</p>
<%}else{ %>
<a href="${pageContext.request.contextPath }/users/loginform.jsp">로그인</a>
<%} %>
<!-- jstl 문법 -->
<c:choose>
<c:when test="${not empty sessionScope.id }">
<p>
<a href="${pageContext.request.contextPath }/users/private/info.jsp">${id }</a> 님 로그인중...
<a href="${pageContext.request.contextPath }/users/logout.jsp">로그아웃</a>
</p>
</c:when>
<c:otherwise>
<a href="${pageContext.request.contextPath }/users/loginform.jsp">로그인</a>
</c:otherwise>
</c:choose>
<h1>인덱스 페이지 입니다.</h1>
<ul>
<li><a href="${pageContext.request.contextPath }/users/signup_form.jsp">회원가입</a></li>
<li><a href="${pageContext.request.contextPath }/private/study.jsp">회원전용공간(공부)</a></li>
<li><a href="${pageContext.request.contextPath }/private/game.jsp">회원전용공간(게임)</a></li>
<li><a href="${pageContext.request.contextPath }/file/list.jsp">자료실</a></li>
<li><a href="${pageContext.request.contextPath }/cafe/list.jsp">글 목록보기</a></li>
</ul>
</div>
</body>
</html>
예시의 jstl 문법의 코드
<c:choose>
<c:when test="${not empty sessionScope.id }">
<p>
<a href="${pageContext.request.contextPath }/users/private/info.jsp">${id }</a> 님 로그인중...
<a href="${pageContext.request.contextPath }/users/logout.jsp">로그아웃</a>
</p>
</c:when>
<c:otherwise>
<a href="${pageContext.request.contextPath }/users/loginform.jsp">로그인</a>
</c:otherwise>
</c:choose>기존에 사용하던 java jsp 문법
<%
//세션 영역에 id 라는 키값으로 저장된 값이 있는지 읽어와 본다. (없으면 null)
String id=(String)session.getAttribute("id");
%>
<%if(id != null){ %>
<p>
<a href="${pageContext.request.contextPath }/users/private/info.jsp">${id }</a> 님 로그인중...
<a href="${pageContext.request.contextPath }/users/logout.jsp">로그아웃</a>
</p>
<%}else{ %>
<a href="${pageContext.request.contextPath }/users/loginform.jsp">로그인</a>
<%} %>사용법만 다를 뿐 같은 로직이다.
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| Step03_Scope (request, response, session 정의 및 메소드 정리) (0) | 2022.08.19 |
| Step02_DB (폼) (0) | 2022.08.19 |
