求讲解一下MVC中jsp生成xhtml的机制（附代码）

下面是jsp文件的代码，引入了一些js文件，系统用的是spring的mvc。网页访问时，呈现的是xhtml文件。不知道哪位能解释一下这中间jsp到xhtml的机制。好像不是用的xslt。谢谢。<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="fmt" uri="http://java.sun.com/jsp/jstl/fmt"%>
<%@ taglib prefix="spring" uri="http://www.springframework.org/tags"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions"%>
<%@ taglib prefix="wc" uri="http://www.pointclickcare.com/core-tags" %>
<%@ taglib prefix="pho" tagdir="/WEB-INF/tags/clinic/pho" %>
<%@ include file="/care/care_imports.jspf"%>
<%@ include file="/care/care_constants.jspf"%>
<%@ include file="/tools/validate.jspf"%>
<!doctype>
<html>
<head>
    <%@ include file="/tools/setheader.jspf"%>
    <title>Order Entry</title>
    <script src="/scripts/jquery.autocomplete-1.1.3-min.js"></script>
    <script src="/scripts/clinic/orderentry.js"></script>
    <script src="/scripts/authentication.js"></script>
    <script src="/scripts/clinic/orderUpdateConfirmationPopup.js"></script>
    <script src="/scripts/components/date/date.js"></script>
    <link type="text/css" rel="stylesheet" href="/styles/authentication.css"/>
    <link type="text/css" rel="stylesheet" href="/styles/clinic/ordUpdateConfirmationPopup.css"/>
    <link type="text/css" rel="stylesheet" href="/styles/autocomplete.css"/>
    <link type="text/css" rel="stylesheet" href="/styles/clinic/enhancedOrderEntry.css"/>
    <% pageContext.setAttribute("termClient",TERM_CLIENT); %>
    <script type="text/javascript">
     
    </script>
</head>
<body>