说明：  这个库简化了开发的基于jsp的Struts应用程序的视图层。这些标记以前作为基本Struts分发的一部分打包，但是已经被提取到一个单独的库中。
(This library simplifies development of a JSP-based view layer of a Struts Application. These tags were previously packaged as part of the base Struts distribution, but have been extracted into a separate library. )