一、引用jar包
1. 将下载好的struts下的核心类库复制到/WEB-INF/lib目录下
二、web.xml配置
check your struts2-core-x.x.jar version.
-->if it is struts2-core-2.5.jar then change your filter class tag value in web.xml to
<filter-class> ????org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter ?</filter-class>-->if it is struts2-core-2.1.3.jar then change your filter class tag value in web.xml to
<filter-class> ????org.apache.struts2.dispatcher.FilterDispatcher ?</filter-class>FilterDispatcher is deprecated since Struts 2.1.3. If you are working with older versions then user above solution.
-->if it is struts2-core-2.3.X.jar then change your filter class tag value in web.xml to
<filter-class> ????org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
【struts2.5配置】web.xml配置
原文地址：http://www.cnblogs.com/guoxh/p/7593882.html