JSP EL表达式详解-优快云博客

本文链接：https://blog.youkuaiyun.com/spftay/article/details/22164063

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ page import="com.jspel.test.*"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

</head>

<body>


${10+10} ${10-10} ${10/10} ${10 div 10 } ${10%10 } ${10/0}

 
{100<200}

<%
pageContext.setAttribute("user", null);
pageContext.setAttribute("name", "");
pageContext.setAttribute("a","a");
%>
${empty user} ${empty name }
 

<jsp:useBean id="user" class = "com.jspel.test.User"></jsp:useBean>
<jsp:setProperty property="shenGao" name="user" value = "17.0f"/>
<jsp:getProperty property="shenGao" name="user"/>
<%
user.setShenGao(20.0f);
Profile profile = new Profile();
HashMap<String,String> maps = new HashMap<String,String>();
maps.put("phone1","123");
profile.setPhone(maps);
user.setProfile(profile);

Address address = new Address();
address.setAddress(new String[]{"北京市"});
profile.setAddress(address);
%>
${user.shenGao} 
${user.profile.phone.phone1} 
${user.profile.address.address[0]} 


<%
pageContext.setAttribute("username","page");
request.setAttribute("username","request");
session.setAttribute("username","session");
application.setAttribute("username","application");

%>
${pageScope.username }
${requestScope.username }
${sessionScope.username }
${applicationScope.username }
${username } 

 

 
 

</body>
</html>

jspel的使用1