Struts2 <s:iterator ><s:if> <s:esle>标签使用和jstl标签循环
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import java.io.Serializable;@SuppressWarnings("all")public class User implements Serializable{private int id;private String username;private String password;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}? ? Struts2 Action
public String list() throws Exception { List list=new ArrayList(); User user=new User(); user.setPassword("admin123"); user.setUsername("张三"); list.add(user); user=new User(); user.setPassword("admin123"); user.setUsername("李四"); list.add(user); if(list!=null){ request.setAttribute("list", list); return "userinfo"; }else{ return "input"; }}? ?jsp页面
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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@taglib prefix="s" uri="/struts-tags" %><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %><%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> <title>用户详情</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> <div align="center"> jstl标签</br> <c:choose> <c:when test="${empty list}"> 没有数据!<br> </c:when> <c:otherwise> <c:forEach items="${list}" var="ls" > 用户名：${ls["username"] }</br> </c:forEach> </c:otherwise> </c:choose> struts2标签</br> <s:iterator value="#request.list" var="ls" > <s:if test="#ls.username!=''"> <!--判断空串 --> <!-- 用户名：<s:property value="username"/></br>方法一 --> 用户名：<s:property value="#ls.username"/><!--方法二 --></br> </s:if> <s:else> 没有数据!<br> </s:else> </s:iterator> </body></html>??
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