This is a good example to dynamically include a header file in JavaServer Pages (JSP):
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="fn" uri="http://java.sun.com/jsp/jstl/functions" %>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>JSP Page</title>
</head>
<body>
<c:set var="userAgent" scope="page" value="${header['User-Agent']}"/>
<c:choose>
<c:when test="${fn:contains(userAgent,'iPhone')}">
<%@include file="header_iphone.jsp" %>
</c:when>
<c:when test="${fn:contains(userAgent,'iPad')}">
<%@include file="header_ipad.jsp" %>
</c:when>
<c:when test="${fn:contains(userAgent,'Android')}">
<%@include file="header_android.jsp" %>
</c:when>
<c:otherwise>
<%@include file="header_other.jsp" %>
</c:otherwise>
</c:choose>
</body>
</html> |