说明：  在网页开发中，我们经常用到一些菜单，可能是下拉菜单，可能是标签式菜单，也可能是树状菜单，Struts-menu帮我们实现了一些常用菜单，而且非常漂亮，这样就大大节省了开发的时间，真可谓是事半功倍呀
(In web development, we have frequently used some of the menu may be the drop-down menu may be tabbed menu, or it may be the tree menu, Struts-menu to help us achieve a number of commonly used menu, but also very beautiful, so that significant savings development time, it really can be a multiplier)