<!--可以在收藏夹中显示出图标-->
<link rel="Bookmark" type="image/x-icon" href="${ctx }/images/favicon.ico"/>
<!--可以在地址栏中显示出图标-->
<link rel="icon" type="image/x-icon" href="${ctx }/images/favicon.ico" />
<link rel="shortcut icon" type="image/x-icon" href="${ctx }/images/favicon.ico" />
原文：http://www.cnblogs.com/guoqiang5297/p/4214380.html