1 package com.mylife.po; 2 3 public class User { 4 5 private String uname; 6 private String pwd; 7 public String getUname() { 8 return uname; 9 } 10 public void setUname(String uname) { 11 this.uname = uname; 12 } 13 public String getPwd() { 14 return pwd; 15 } 16 public void setPwd(String pwd) { 17 this.pwd = pwd; 18 } 22 }
以上是po类。
以下是jsp页面的具体ognl操作。
1 <%@page import="com.mylife.po.User"%> 2 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 3 <%@ taglib prefix="s" uri="/struts-tags" %> 4 <% 5 String path = request.getContextPath(); 6 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 7 %> 8 9 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 10 <html> 11 <head> 12 <base href="<%=basePath%>"> 13 14 <title>My JSP 'tags.jsp' starting page</title> 15 16 <meta http-equiv="pragma" content="no-cache"> 17 <meta http-equiv="cache-control" content="no-cache"> 18 <meta http-equiv="expires" content="0"> 19 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 20 <meta http-equiv="description" content="This is my page"> 21 <!-- 22 <link rel="stylesheet" type="text/css" href="styles.css"> 23 --> 24 25 26 <% 27 String id =request.getParameter("id"); 28 request.setAttribute("id", id); 29 30 User u1=new User(); 31 u1.setUname("cherry_1"); 32 u1.setPwd("33"); 33 User u2=new User(); 34 u2.setUname("cherry_2"); 35 u2.setPwd("23"); 36 User u3=new User(); 37 u3.setUname("cherry_3"); 38 u3.setPwd("43"); 39 40 List list=new ArrayList(); 41 list.add(u1); 42 list.add(u2); 43 list.add(u3); 44 request.setAttribute("list", list); 45 46 Map map = new HashMap(); 47 map.put("u1", u1); 48 map.put("u2", u2); 49 map.put("u3", u3); 50 request.setAttribute("map", map); 51 52 %> 53 </head> 54 55 <body> 56 57 <h1>测试</h1> 58 <s:if test="#request['id'] >= 18">年龄达标</s:if> 59 <s:else>年龄不合格</s:else> 60 61 <hr size="4" color="blue"> 62 <h2 style="color: red"> 迭代list-1:</h2> 63 <s:iterator value="#request['list']" var="u"> 64 <s:property value="#u.uname"/> 65 </s:iterator> 66 67 <hr size="4" color="blue"> 68 <h2 style="color: red">迭代list-2:</h2> 69 <s:iterator value="#request['list']"> 70 <s:property value="pwd"/> 71 </s:iterator> 72 73 <hr color="blue" size="5"> 74 <h2 style="color: red">迭代list-3:</h2> 75 <s:iterator begin="0" end="#request['list'].size()-1" var="i"> 76 <s:property value="#request['list'].get(#i).uname"/> 77 </s:iterator> 78 79 <hr color="blue" size="5"> 80 <h2 style="color: red"> 迭代map-1:</h2> 81 <s:iterator value="#request['map']"> 82 <s:property value="key"/>----> 83 <s:property value="value.uname"/>, 84 <s:property value="value.pwd"/><br> 85 </s:iterator> 86 87 <hr color="blue" size="5"> 88 <h2 style="color: red"> 迭代map-2:</h2> 89 <s:iterator value="#request['map'].keySet()" var="i"> 90 <s:property value="#i"/>-->>> 91 <s:property value="#request['map'].get(#i).uname"/>, 92 <s:property value="#request['map'].get(#i).pwd"/><br> 93 </s:iterator> 94 95 <hr color="blue" size="5"> 96 <h2 style="color: red"> 迭代map-3:</h2> 97 <s:iterator value="#request['map'].entrySet()" var="e"> 98 <s:property value="#e.getKey()"/>-->> 99 <s:property value="#e.getValue().uname"/>, 100 <s:property value="#e.getValue().pwd"/><br> 101 </s:iterator> 102 103 </body> 104 </html>