MVC:Struts

Today,script an example for hands-on struts.
web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
version="2.4"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
  <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>
 <servlet-name>SelectCityServlet</servlet-name>
 <servlet-class>com.aaron.servlet.SelectCityServlet</servlet-class>
 </servlet>
 
 <servlet-mapping>
 <servlet-name>SelectCityServlet</servlet-name>
 <url-pattern>/servlet/SelectCityServlet</url-pattern>
 </servlet-mapping>
 
 
  <servlet-mapping>
    <servlet-name>action</servlet-name>
    <url-pattern>*.do</url-pattern>
  </servlet-mapping>
</web-app>

struts-conf.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
  <data-sources />
  <form-beans >
    <form-bean name="loginForm" type="com.aaron.struts.form.LoginForm" />

  </form-beans>

  <global-exceptions />
  <global-forwards >
    <forward name="success" path="/success.jsp" />
  </global-forwards>

  <action-mappings >
    <action
      attribute="loginForm"
      input="/input.jsp"
      name="loginForm"
      path="/login"
      scope="request"
      type="com.aaron.struts.action.LoginAction">
      <forward name="success" path="/success.jsp" />
    </action>
   
    <!-- Struts Ajax -->
    <action
       type="com.aaron.struts.action.CheckAction"
       scope="request"
       path="/check">
       <forward name="success" path="/struts-ajax.jsp"/>
 </action>
 
  </action-mappings>

  <message-resources parameter="com.aaron.struts.ApplicationResources" />
</struts-config>