707
No
ex01.jsp
<%@page import="java.util.Enumeration"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<%
// Enumeration<String> headers =request.getHeaderNames();
%>
<!-- http header 출력 -->
<c:forEach var="h" items="${header}">
${h.key } => ${h.value } <br>
</c:forEach>
<hr>
<p>
<!-- set var="변수명" value="값" -->
<c:set var="browser" value="${header['User-Agent'] }"/>
<c:out value="${browser }" /> <!-- 출력문 -->
<hr>
<c:remove var="browser"/> 변수 삭제
<c:out value="${browser }" />
</body>
</html>
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accept-language => ko-KR,ko;q=0.8,en-US;q=0.6,en;q=0.4 Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36 변수 삭제
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ex02.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<!-- set var="변수명" value="값" scope="사용범위"
scope="사용범위" page request session application
-->
<%
pageContext.setAttribute("country", "Korea");
%>
<c:set var="country" value="Korea" scope="page" />
<!-- if test="조건식" -->
<c:if test="${country !=null }">
국가명 : ${country }
</c:if>
<%
int[] nums= {10, 70, 80, 90, 100};
%>
<c:set var="num" value="<%= nums %>" />
<!-- forEach var="개별값" items="집합" -->
<c:forEach var="n" items="${num }">
${n},
</c:forEach>
<br>
<c:set var="season" value="가을" />
<c:choose>
<c:when test="${season =='봄' }">
봄*봄
</c:when>
<c:when test="${season =='여름' }">
여름*여름
</c:when>
<c:when test="${season =='가을' }">
가을*가을
</c:when>
<c:when test="${season =='겨울' }">
겨울*겨울
</c:when>
<c:otherwise>
그 외의 계절
</c:otherwise>
</c:choose>
</body>
</html>
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국가명 : Korea 10, 70, 80, 90, 100,
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ex03.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script src="http://code.jquery.com/jquery-3.2.1.min.js"></script>
</head>
<body>
<!-- set var="변수명" value="값" scope="사용범위"
기본적으로 String type으로 저장됨
scope 을 생략하면 현재 페이지에서만 사용 가능함
java EL JSTL
pageContext pageScope page
request requestScope request
session sessionScope session
application applicationScope application
-->
<%
int n = 100;
%>
<c:set var="num" value="<%=n %>" scope="page" />
<%
int a = (Integer) pageContext.getAttribute("num");
out.println(a);
%>
<br> num : ${pageScope.num }
</body>
</html>
기본적으로 String type으로 저장되고 형변환시 에러발생.
으로 다음과 같이 작성
<%
int n = 100;
%>
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100
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