我在地址栏上输http://localhost:8080/HelloWorld/helloworld_aaa.action报的还是404错误，不是默认action的网页

helloworld.xml：

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

<package name="default" namespace="/" extends="struts-default">

<default-action-ref name="index"></default-action-ref>

<action name="index">

<result>/error.jsp</result>

</action>

<action name="helloworld_*" class="com.imooc.action.HelloWorldAction">

<result>{1}.jsp</result>

</action>

</package>

</struts>