Set the base url for jsp

Sometimes when you’re working on jsp pages and you need to set a base url for all pages, and this value needs to be available for use, then use the following

 
    <c:set var="req" value="${pageContext.request}" />
	<c:set var="uri" value="${req.requestURI}" />
	<c:set var="url">${req.requestURL}</c:set>
	<base href="${fn:substring(url, 0, fn:length(url) - fn:length(uri))}${req.contextPath}/" />

For css and js files you can use these kind of href:

 
    <link href="resources/bootstrap2/css/bootstrap.css" rel="stylesheet">
    <script type="text/javascript" src="resources/js/lib/jquery.js"></script>

This will work when it is deployed on different servers with different ports.