JSTL标签中c:choose,c:when,c:otherwise 可以实现if...else if..else的用法
2016-11-13 13:54
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<%@ 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+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'jstl1.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">
</head>
<body>
<%-- <h4>c:out</h4>
<c:set var="info" value="JSTL标签" scope="request"></c:set>
Book:${requestScope.info}<br/><br/>
Book:<c:out value="${requestScope.info}"></c:out><br/>
<c:set var="year" value="1997" scope="session"></c:set>
Book:${sessionScope.year}<br/><br/>
Book:<c:out value="${sessionScope.year}"></c:out><br/>
<c:remove var="year" scope="session"/>
Book:${sessionScope.year}<br/><br/>
Book:<c:out value="${sessionScope.year}"></c:out>
<h4>c:if</h4>
<c:set value="20" var="age" scope="request"></c:set>
<c:if test="${requestScope.age>18}" var="isAdult" scope="request">已经成年了</c:if>
<c:out value="${requestScope.isAdult}"></c:out> --%>
<h4>c:choose,c:when,c:otherwise 可以实现if...else if..else</h4>
<c:set value="20" var="age" scope="request"></c:set>
<c:choose>
<c:when test="${requestScope.age>60}">老年</c:when>
<c:when test="${requestScope.age>40}">中年</c:when>
<c:when test="${requestScope.age>18}">青年</c:when>
<c:otherwise>幼年</c:otherwise>
</c:choose>
</body>
</body>
</html>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'jstl1.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
</head>
<body>
<%-- <h4>c:out</h4>
<c:set var="info" value="JSTL标签" scope="request"></c:set>
Book:${requestScope.info}<br/><br/>
Book:<c:out value="${requestScope.info}"></c:out><br/>
<c:set var="year" value="1997" scope="session"></c:set>
Book:${sessionScope.year}<br/><br/>
Book:<c:out value="${sessionScope.year}"></c:out><br/>
<c:remove var="year" scope="session"/>
Book:${sessionScope.year}<br/><br/>
Book:<c:out value="${sessionScope.year}"></c:out>
<h4>c:if</h4>
<c:set value="20" var="age" scope="request"></c:set>
<c:if test="${requestScope.age>18}" var="isAdult" scope="request">已经成年了</c:if>
<c:out value="${requestScope.isAdult}"></c:out> --%>
<h4>c:choose,c:when,c:otherwise 可以实现if...else if..else</h4>
<c:set value="20" var="age" scope="request"></c:set>
<c:choose>
<c:when test="${requestScope.age>60}">老年</c:when>
<c:when test="${requestScope.age>40}">中年</c:when>
<c:when test="${requestScope.age>18}">青年</c:when>
<c:otherwise>幼年</c:otherwise>
</c:choose>
</body>
</body>
</html>
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