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<%@page import="cn.jiemoxiaodi.domain.Person"%> <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP ‘demo1.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"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <h3>传统方式获得的值</h3> <% pageContext.setAttribute("pageName", "pagVal"); request.setAttribute("reqName", "reqVal"); session.setAttribute("sessionName", "sessionVal"); application.setAttribute("appName", "appVal"); %> <%=pageContext.getAttribute("pageName")%> <%=request.getAttribute("reqName")%> <%=session.getAttribute("sessionName")%> <%=application.getAttribute("appName")%> <H3>使用EL表达式获得的值</H3> ${pageScope.pageName} ${requestScope.reqName} ${sessionScope.sessionName} ${applicationScope.appName} 简写 ${pageName} ${reqName} <h3>使用EL获得集合的值</h3> <% String[] str = new String[] { "张三", "lisi", "招六" }; pageContext.setAttribute("str", str); %> ${str[0]} ${str[1]} ${str[2]} <h3>使用EL获得List集合的值</h3> <% List<String> tempList = new ArrayList<String>(); tempList.add("张三"); tempList.add("李四"); tempList.add("王武"); pageContext.setAttribute("ArrayLists", tempList); %> ${ArrayLists[0]} ${ArrayLists[1]} ${ArrayLists[2]} <h3>使用EL获得Map集合的值</h3> <% Map<String, String> tempMap = new HashMap<String, String>(); tempMap.put("first", "zhangfirst"); tempMap.put("second", "two"); tempMap.put("third", "three"); tempMap.put("four", "four"); pageContext.setAttribute("Maps", tempMap); %> ${Maps.first} ${Maps.second} ${Maps.third} ${Maps.four} <h3>使用EL获得对象的值</h3> <% Person p = new Person(); p.setName("小红"); p.setAge(22); pageContext.setAttribute("p", p); %> ${p.name} ${p.age} <h3>使用EL获得集合中对象的数据</h3> <% List<Person> pList = new ArrayList<Person>(); pList.add(new Person("张三", 22)); pList.add(new Person("李四", 44)); pageContext.setAttribute("pList", pList); %> ${pList[0].name} ${pList[0].age} ${pList[1].name} ${pList[1].age} </body> </html>
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原文地址：http://www.cnblogs.com/jiemoxiaodi/p/5232750.html
