Java 如何使用 JSTL、EL 在 JSP 页面中检查浏览器的用户代理?
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How do you check the browser's user agent in a JSP page using JSTL, EL?
提问by Christopher Tokar
I need to check the browser's user-agent to see if it is IE6. However I shouldn't use scriptlets (we have a strict no scriptlets policy) to do this.
我需要检查浏览器的用户代理,看看它是否是 IE6。但是,我不应该使用 scriptlet(我们有严格的无 scriptlet 政策)来执行此操作。
Currently I use
目前我使用
<%
String ua = request.getHeader( "User-Agent" );
boolean isMSIE = ( ua != null && ua.indexOf( "MSIE" ) != -1 );
%>
<% if( isMSIE ){ %>
<div>
<% } %>
What is the cleanest way to do this using JSTL, EL, etc and not scriptlets?
使用 JSTL、EL 等而不是 scriptlet 执行此操作的最简洁方法是什么?
采纳答案by laginimaineb
<c:set var="browser" value="${header['User-Agent']}" scope="session"/>
回答by Zoltan
<c:if test="${fn:contains(header['User-Agent'],'MSIE')}"></c:if>
回答by mahesh nanayakkara
If you are using spring-mobileframework you can use following to check device type
如果您使用的是spring-mobile框架,您可以使用以下内容来检查设备类型
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<c:choose>
<c:when test="${currentDevice.normal}"><p>"Welcome desktop user"</p> </c:when>
<c:when test="${currentDevice.mobile}"><p>"Welcome mobile user"</p> </c:when>
<c:when test="${currentDevice.tab}"><p>"Welcome tab user"</p> </c:when>
</c:choose>