jsp traverse list collection-javaTutorial-php.cn

jsp traverse list collection

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Release： 2019-05-24 14:38:31

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This article will introduce how to traverse the List collection from a JSP page.

jsp traverse list collection

Example 1:

<%@ page language="java" import="java.util.*" 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+"/";
%>
 
    <%
    	List<String> list = new ArrayList<String>();
    	list.add("简单是可靠的先决条件");
    	list.add("兴趣是最好的老师");
    	list.add("知识上的投资总能得到最好的回报");
    	request.setAttribute("list", list);
     %>
 
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>Jsp使用c:forEach遍历List集合</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">
  </head>
  
  <body>
     <b>遍历List集合的全部元素：</b>
     <br>
     <c:forEach items="${requestScope.list}" var="keyword" varStatus="id">
     	${id.index} ${keyword}<br>
     </c:forEach>
     <br>
     <b>遍历List集合中第一个元素以后的元素（不包括第一个元素）：</b>
     <br>
     <c:forEach items="${requestScope.list}" var="keyword" varStatus="id" begin="1">
		${id.index} ${keyword}<br>
     </c:forEach>
  </body>
</html>

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Example 2:Two-level List traversal

<%
		List list = new ArrayList();
		List list1 = new ArrayList();
		List list2 = new ArrayList();
		list1.add("1-a");
		list1.add("1-b");
		list2.add("2-d");
		list2.add("2-c");
		list.add(list1);
		list.add(list2);
		request.setAttribute("list1", list1);
		request.setAttribute("list", list);
		%>
		<c:forEach items="${list }" var="item">
			<c:forEach items="${item }" var="item2">
				<tr>
					<td>${item2 }</td>
				</tr>
		</c:forEach>

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