[S2] Action can not redirect with extend pattern?

[TANG Xigen]

Hi All


I write a simple self "PlatformActionSupport" to let it's children can
redirect to result "start" when url like "*!start.action", but when i
test my code, i find some works fine, some doesn't!

[ Father  PlatformActionSupport ]
@SuppressWarnings("serial")
public abstract class PlatformActionSupport extends ActionSupport {

        public String doStart() {
                return "start";
        }
}

[ ChildA loginAction extend PlatformActionSupport ]
@SuppressWarnings("serial")
public class LoginAction extends PlatformActionSupport {}

[ ChildB RegistAction extend PlatformActionSupport ]
@SuppressWarnings("serial")
public class RegistAction extends PlatformActionSupport {}

[ Struts.xml ]

        <package name="com.dztalk.client.webflow.struts.pojos"
extends="struts-default">
                <interceptors>
                        <interceptor name="LanguageFocusInterceptor"
class="com.dztalk.client.webflow.struts.interceptors.LanguageFocusInterc
eptor"></interceptor>
                        <interceptor-stack name="default">

                                <interceptor-ref
name="LanguageFocusInterceptor"></interceptor-ref>
                                <interceptor-ref
name="defaultStack"></interceptor-ref>
                        </interceptor-stack>
                </interceptors>
                
                <action name="Logon!*" method="{1}"
class="com.dztalk.client.webflow.struts.pojos.LoginAction">
                        <interceptor-ref
name="default"></interceptor-ref>
                        <result
name="start">/pages/generals/Logon.jsp</result>
                </action>
                
                <action name="Regist!*" method="{1}"
class="com.dztalk.client.webflow.struts.pojos.RegistAction">
                        <interceptor-ref
name="default"></interceptor-ref>
                        <result
name="start">/pages/generals/Regist.jsp</result>
                </action>
        </package>


urlA:"http://localhost:8080/dztalk-webflow/Regist!start.action";   ---
works fine
urlB:"http://localhost:8080/dztalk-webflow/Logon!start.action";  ---
failed

exception trace below

Could not find action or result
No result defined for action
com.dztalk.client.webflow.struts.pojos.LoginAction and result input -
action


[S]: i find urlA call dostart() method in "PlatformActionSupport" but
urlB not!
        As struts doc, i think Logon&Regist in my conf are almost
sameness action defition with just different name. why Logon doesn't
work in my way? can anyone do me a favor about this topic!