There is no Action mapped for namespace /XXX and action name XXXX

一直出现上面的问题，配置检查了好多次，还是报同样的错误，无意中发现犯了一个低级的错误

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"><struts><constant name="struts.devMode" value="true"></constant><package name="memory" extends="/struts-default" namespace="/memory"><action name="validateCode" class="cn.cd.action.CommonAction"><result name="SUCCESS">/index.jsp</result></action></package></struts>    

?

package的extends属性的值应该是"struts-default"而不是"/struts-default",修改之后完全正常了