配置的是2.5版本struts2，其余都根據慕友的建議修改了，可以正常運行，在通配符這，一個通配符可以正常運行，使用兩個的通配符就報錯。請問，這如何解決？

<?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"?strict-method-invocation="false">
????????
????????<action?name="*_*"?method="{2}"?class="com.imooc.action.{1}Action">
????????????<result>/result.jsp</result>
????????????<result?name="add">/{2}.jsp</result>
????????????<result?name="update">/{2}.jsp</result>
????????</action>
????
????</package>
????
????<constant?name="struts.enable.DynamicMethodInvocation"?value="false"></constant>

</struts>

package?com.imooc.action;

import?com.opensymphony.xwork2.ActionSupport;

public?class?HelloWorldAction?extends?ActionSupport?{

????public?String?add()?{
????????return?"add";
????}
????
????public?String?update()?{
????????return?"update";
????}
????
????@Override
????public?String?execute()?throws?Exception?{
????????System.out.println("執行了Action");
????????return?SUCCESS;
????}
????
}