相对路径${pageContext.request.contextPath}

https://blog.csdn.net/bug_moving/article/details/53127030

<%@ taglib prefix="t" uri="/menu-tags"%>
<c:set var="ctx" value="${pageContext.request.contextPath}${fns:getAdminPath()}"/>
<c:set var="ctxStatic" value="${pageContext.request.contextPath}/static"/>
<c:set var="qiniuUrl" value="http://oyp0k7grl.bkt.clouddn.com/"/>