本文详细介绍了JSP页面如何使用JSTL标签库实现动态内容展示，包括设置页面属性、利用标签进行循环遍历等核心操作。
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%@ 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>My JSP 'tag.jsp' starting page</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>
<%
List list=new ArrayList<String>();
list.add("abc");
list.add("sssss");
list.add("bbbbvvv");
request.setAttribute("list",list);
%>
<c:forEach items="${list}" var="li">
${li} <br>
</c:forEach>
</body>
</html>
运行原理 tomcat 读取jsp 生成servlet 请求时---->解析标签文件--->遇到前缀--->
----->找地址----->在web-inf下找tld文件----jstl.ja----->找到c.tld文件，里面定义了一些xml标签---->找到forEach名为-----》钟祥一个Foreach的类
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'tag.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
List list=new ArrayList<String>();
list.add("abc");
list.add("sssss");
list.add("bbbbvvv");
request.setAttribute("list",list);
%>
<c:forEach items="${list}" var="li">
${li} <br>
</c:forEach>
</body>
</html>
运行原理 tomcat 读取jsp 生成servlet 请求时---->解析标签文件--->遇到前缀--->
----->找地址----->在web-inf下找tld文件----jstl.ja----->找到c.tld文件，里面定义了一些xml标签---->找到forEach名为-----》钟祥一个Foreach的类
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