c.tld中<c:if>和<c:choose>的使用
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<%@ taglib uri="http://www.zhang.com" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>${sessionScope.name}</title>
</head>
<body>
<c:if test="${empty (sessionScope.name) and empty (sessionScope.score)}"
var="flag" scope="request">
<h3>姓名成绩不能为空</h3>
</c:if>
<c:if test="${not flag}">
<c:choose>
<c:when test="${sessionScope.score>=90}">
<h3>恭喜${sessionScope.name}同学,你获得了优秀(${sessionScope.score}分)</h3>
</c:when>
<c:when test="${sessionScope.score>=70}">
<h3>恭喜${sessionScope.name}同学,你获得了良好(${sessionScope.score}分)</h3>
</c:when>
<c:when test="${sessionScope.score>=60}">
<h3>恭喜${sessionScope.name}同学,你获得了及格(${sessionScope.score}分)</h3>
</c:when>
<c:otherwise>
<h3>${sessionScope.name}同学,这次考试不及格，要加油哦(${sessionScope.score}分)</h3>
</c:otherwise>
</c:choose>
</c:if>
</body>
</html>
<%@ taglib uri="http://www.zhang.com" prefix="c"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>${sessionScope.name}</title>
</head>
<body>
<c:if test="${empty (sessionScope.name) and empty (sessionScope.score)}"
var="flag" scope="request">
<h3>姓名成绩不能为空</h3>
</c:if>
<c:if test="${not flag}">
<c:choose>
<c:when test="${sessionScope.score>=90}">
<h3>恭喜${sessionScope.name}同学,你获得了优秀(${sessionScope.score}分)</h3>
</c:when>
<c:when test="${sessionScope.score>=70}">
<h3>恭喜${sessionScope.name}同学,你获得了良好(${sessionScope.score}分)</h3>
</c:when>
<c:when test="${sessionScope.score>=60}">
<h3>恭喜${sessionScope.name}同学,你获得了及格(${sessionScope.score}分)</h3>
</c:when>
<c:otherwise>
<h3>${sessionScope.name}同学,这次考试不及格，要加油哦(${sessionScope.score}分)</h3>
</c:otherwise>
</c:choose>
</c:if>
</body>
</html>
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