JSTL+ELによるループ反復
3608 ワード
使用前にパッケージをインポートする必要があります jstl.jarと standard.jar
<%@ page language="java" import="java.util.*,com.wzh.test.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%
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> el+jstl </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><br>
<%
List list=new ArrayList();
list.add(new Person("aa"));
list.add(new Person("bb"));
list.add(new Person("cc"));
request.setAttribute("slist", list);
%>
<c:forEach items="${slist }" var="person">
${person.name} </br>
</c:forEach>
<%
Map map = new HashMap();
map.put("aa", new Person("aaa"));
map.put("bb11", new Person("bbb"));
request.setAttribute("smap", map);
%>
<c:forEach items="${smap }" var="entry">
${entry.key } : ${entry.value.name } </br>
</c:forEach>
<c:if test="${user!=null }">
：${user.username }
</c:if>
<c:if test="${user==null }">
</c:if>
</body>
</html>