liferay 如何添加css或者js

<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
<%@page contentType="text/html; charset=UTF-8" %>
<portlet:defineObjects />

<%
	String rootPaht = renderRequest.getContextPath();//得到路径
%>

<script type="text/javascript" src="<%=rootPaht%>/js/jquery-1.8.2.min.js"></script>  //将js引进