java web中 EL表达式的相关案例：

java web中 EL表达式的相关案例：

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%String abc="ABC";String xyz="XYZ";//原因是没有把abc放到作用域里pageContext.setAttribute("abc", xyz);pageContext.setAttribute("xyz", abc);session.setAttribute("abc", "abcabcabc");request.setAttribute("aaa", "requestAAA");%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>${sessionScope.abc }<br>${pageScope.xyz}<br>${aaa}
<%//request.getRequestDispatcher("p12260.jsp").forward(request, response);
//request.getRequestDispatcher("p12260.jsp?www=www666").forward(request, response);request.getRequestDispatcher("p12260.jsp?www=www666&www=www777").forward(request, response);
%>
</body>
</html>

<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%><%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %><!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>${sessionScope.abc }<br>${pageScope.xyz}<br>${aaa}<br>${param.www }<br><c:forEach items="${paramValues.www}" var="u">
Item <c:out value="${u}"/><p>
</c:forEach></body>
</html>

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