logic:iterate标签

<logic:iterate id=" " scope=" " name=" ">

id是迭代时的临时变量名称

两种查找迭代对象的方式:

1,name:所指代的bean必须是一个集合类型

2,name+property:该bean的property属性必须是一个集合类型

<%@ page language="java" import="java.util.*,demo.User" pageEncoding="UTF-8"%>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic" %>
<%
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 'LogicTldTest.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>
  <% 
  	String [] usernames={"haha","xiaohu","maoni","daben"};
  	request.setAttribute("usernames", usernames);
  	
  	ArrayList<User> arr=new ArrayList<User>();
  	User user1=new User();
  	user1.setUsername("xiaohe");
  	String [] fa={"read","sing","dance"};
  	user1.setFavorates(fa);
  	arr.add(user1);
  	
  	User user2=new User();
  	user2.setUsername("tata");
  	String [] fas={"sleep","run","football"};
  	user2.setFavorates(fas);
  	arr.add(user2);
  	request.setAttribute("arr", arr);
  %>
  <body>
    <logic:iterate id="username" scope="request" name="usernames">
    ${username }    
    </logic:iterate>
    
    <br />
    <logic:iterate id="user" scope="request" name="arr">
    ${user.username }    
    	<logic:iterate id="fav" name="user" property="favorates">
    	 ${fav }    
    	</logic:iterate>
    	<br />
    </logic:iterate>
  </body>
</html>


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