wuheng
/
vip21-javaweb


			
				
					
						
						
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							<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%--
  Created by IntelliJ IDEA.
  User: 武恒
  Date: 2023/2/18
  Time: 15:31
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>JSTL 标签</title>
</head>
<body>

<%
    int n = 10;
    String[] arr = {"苹果","鸭梨","香蕉","菠萝","桃子"};
    request.setAttribute("n", n);
    request.setAttribute("arr", arr);
%>

<div style="width: 600px; margin: 0 auto; height: 800px">
    <h1> 循环遍历 </h1>
    <c:forEach begin="0" end="${n}" var="var" >
        ${var}
    </c:forEach>
    <h1> 循环数组 </h1>
    <ul>
    <c:forEach items="${arr}" var="var" >
        <li>${var}</li>
    </c:forEach>
    </ul>
    <h1> IF标签 </h1>
    <%
        //1 男生 2 女生
        int sex = 1;
        request.setAttribute("sex", sex);
    %>
    <c:if test="${sex == 1}" >
        <span>张三是男生</span>
    </c:if>
    <c:if test="${sex > 1}" >
        <span>张三是女生</span>
    </c:if>
    <h1> set标签 </h1>
    <c:set var="name" value="张三" scope="page" />
    <h5>${name}</h5>

    <h1> when标签 </h1>
    <c:choose>
        <c:when test="${sex == 1}"><span>张三是男生</span></c:when>
        <c:when test="${sex > 1}"><span>张三是女生</span></c:when>
        <c:otherwise><span>张三不明生物</span></c:otherwise>
    </c:choose>
</div>
</body>
</html>