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