STRUTS高手来给解决下问题

报错：No action config found for the specified url.

BEAN:
package app;
import org.apache.struts.action.ActionForm;
public class RegisterForm extends ActionForm {
private String password2;
private String password1;
private String username;
public String getPassword1() {
return password1;
}
public void setPassword1(String password1) {
this.password1 = password1;
}
public String getPassword2() {
return password2;
}
public void setPassword2(String password2) {
this.password2 = password2;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}

}
=========================
ACTION:
package app;
import org.apache.struts.action.*;
import javax.servlet.http.*;
import java.io.*;
public class RegisterAction extends Action {
public ActionForward execute

首先，你要确保在web.XML中已经配置好了
如果没有配置，在web.xml文件中加入以下代码：
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<init-param>
<param-name>debug</param-name>
<param-value>3</param-value>
</init-param>
<init-param>
<param-name>detail</param-name>
<param-value>3</param-value>
</init-param>
<load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>