标签：EL pageScope requestScope uname 表达式 范围
1.EL表达式
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>EL</title>
</head>
<body>
<%
pageContext.setAttribute("uname","zhangsan");
request.setAttribute("uname","lisi");
session.setAttribute("uname","wangwu");
application.setAttribute("uname","zhaoliu");
%>
<%--获取数据--%>
<%--会默认去范围最小的那个uname值--%>
获取域对象：${uname}<br>
<%--要想取特定范围的域对象的值--%>
page范围：${pageScope.uname}<br>
request范围：${requestScope.uname}<br>
session范围：${sessionScope.uname}<br>
application范围：${applicationScope.uname}<br>
</body>
</html>
2.EL表达式的使用
标签：EL,
pageScope,
requestScope,
uname,
表达式,
范围
From： https://www.cnblogs.com/hmy22466/p/16794784.html