

<%@ 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>
<%=1 +2 %><br>
${1+2}<br>
${1==1 }<br>
${1==2? '같음' : '다름' }<br>
${1<2 || 1>2 }<br>
${1<2 or 1>2 }<br>
${1 <2 && 1>2 }<br>
${1<2 and 1>2 }<br>
${'홍길동' == '홍길동' }<br>
${'홍길동' eq '홍길동' }<br>
${!false }<br>
${ not false }<br>
</body>
</html>

<%@ 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>
<form action = "el_form_ok.jsp" method = "post">
아이디:<input type="text" name = "id"><br>
비밀번호 : <input type = "password" name = "pw"><br>
<input type = "submit" value = "확인">
</form>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
//String id = request.getParameter("키");
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
${param.id }<br>
${param.pw }<br>
</body>
</html>

<%@page import="java.util.Date"%>
<%@page import="com.example.bean.MemberVO"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
//2개의 값을 저장
request.setAttribute("name","홍길동");
MemberVO vo = new MemberVO("aaa123","1234","naver.com");
request.setAttribute("vo",vo);
//세션에 1개의 값을 저장
session.setAttribute("now",new Date());
//포워드
request.getRequestDispatcher("el_request_ok.jsp").forward(request,response);
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
</body>
</html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%
String name =(String)request.getAttribute("name");
%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<!-- requestScope는 생략이 가능하다. -->
${requestScope.name }<br>
${requestScope.vo.id }<br>
${vo.name }<br>
${vo.email }<br>
<%=name %><br>
${sessionScope.now }
</body>
</html>

JSTL




