求教：在JSF中JSTL的使用问题

在jsf的xhtml页面中如何使用jstl？<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:f="http://java.sun.com/jsf/core" xml:lang="en" lang="en">
<h:head>
<title>My Facelets Page</title>
<meta http-equiv="keywords" content="enter,your,keywords,here" />
<meta http-equiv="description"
content="A short description of this page." />
<meta http-equiv="content-type" content="text/html; charset=UTF-8" /> <!--<link rel="stylesheet" type="text/css" href="styles.css">-->
</h:head>
<h:body>
<h:form>
<h:commandButton value="lookUsers" actionListener="#{userBean.lookAll}"/>
</h:form>
<h:dataTable value="#{userBean.list}" var="user" border="1">
<h:column>
<f:facet name="header">编号</f:facet>
#{user.userid}
</h:column>
<h:column>
<f:facet name="header">姓名</f:facet>
#{user.username}
</h:column>
<h:column>
<f:facet name="header">性别</f:facet>
#{user.gender}
                                <c:if test="">男</c:if>//这里如何取数据呢？
<c:if test="">女</c:if>//
</h:column>
<h:column>
<f:facet name="header">状态</f:facet>
#{user.userstate}
</h:column>
</h:dataTable>
</h:body>
</html>