<x:if/>标签
<%@ page language="java" contentType="text/html; charset=UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/xml" prefix="x"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<style>
body,td,div {
font-size: 12px;
}
.source {
white-space: pre;
width: 100%;
height: 200px;
overflow: scroll;
border: 1px solid #999999;
padding: 2px;
margin-bottom: 20px;
}
</style>
</head>
<body>
<c:import var="file" url="/WEB-INF/context.xml" />
<div class="source"><c:out value="${ file }" /></div>
<x:parse var="doc" doc="${ file }"></x:parse>
<x:if select="$doc/Context/Resource/@driverClassName" var="exists">
属性 Driver Class Name 存在: <x:out select="$doc/Context/Resource/@driverClassName"/>. <br/>
</x:if>
<c:if test="${ ! exists }">
属性 Driver Class Name 不存在。
</c:if>
</body>
</html>
