forEach样例
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ page import="jstl.UserInfo"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<html>
<head>
<title>forEach标签应用示例</title>
</head>
<body>
<h2>forEach标签应用示例</h2>
<hr>
<%
//定义一个用户数组
String[] zhangs = { "zhang1", "zhang2", "zhang3", "zhang4" };
request.setAttribute("zhangsan", zhangs);
%>
<table border=1 width=400>
<tr align=center>
<td>内容</td>
<td>索引值</td>
<td>共访问过</td>
<td>是否为第一个成员</td>
<td>是否为最后一个成员</td>
</tr>
<c:forEach items="${zhangsan}" var="z" varStatus="s">
<tr align=center>
<td>
<c:out value="${z}" />
</td>
<td>
<c:out value="${s.index}" />
</td>
<td>
<c:out value="${s.count}" />
</td>
<td>
<c:out value="${s.first}" />
</td>
<td>
<c:out value="${s.last}" />
</td>
</tr>
</c:forEach>
</table>
<hr />
<%
List list = new ArrayList();
for (int i = 0; i < 10; i++) {
UserInfo user = new UserInfo(i, "张" + i);
list.add(user);
}
request.setAttribute("list", list);
%>
<table border=1 width=400>
<tr align=center>
<td>编号</td>
<td>姓名</td>
</tr>
<c:forEach items="${list}" var="u">
<tr align=center>
<td>
<c:out value="${u.userId}" />
</td>
<td>
<c:out value="${ u.userName}" />
</td>
</tr>
</c:forEach>
</table>
</body>
</html>
forEach实现break效果
当满足某个条件的时候要终止循环,但是标签里不能使用 break,而我们能在一开始就知晓end下标,所以当循环体是有满足break条件时,就手动把终止的下标置为0.
<c:forEach var="item" items="${list}" end="exitIndex">
<c:if test="${item == 'exit'}">
<c:set var="exitIndex" value="0"></c:set>
</c:if>
</c:forEach>
详细说明: http://www.cnblogs.com/youngjoy/p/3642359.html
引用自: https://jingyan.baidu.com/article/7082dc1c50ad16e40a89bd0f.html