<form action="<%= request.getContextPath() %>/login.do" method="post">

         username:<input type="text" name="username" /><br>

         password:<input type="password" name="password" />

         <input type="submit" value="login" />

     </form>

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

 <web-app version="2.5"

     xmlns="http://java.sun.com/xml/ns/javaee"

     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

   <servlet>

   <!-- 这里的servlet-name和下面的servlet-name成对应关系 -->

       <servlet-name>action</servlet-name>

       <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>

       <!-- 以下的读取参数,就是加载配置文件 -->

       <init-param>

           <param-name>config</param-name>

           <param-value>/WEB-INF/struts-config.xml</param-value>

       </init-param>

       <load-on-startup>0</load-on-startup>

   </servlet>

   <!-- 所有的.do请求 进这里来,当有do请求过来的时候,根据servlet-name查找到相应的servlet. -->

   <servlet-mapping>

       <servlet-name>action</servlet-name>

       <url-pattern>*.do</url-pattern>

   </servlet-mapping>

 </web-app>

 <?xml version="1.0" encoding="ISO-8859-1" ?>

 <!DOCTYPE struts-config PUBLIC

           "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"

           "http://struts.apache.org/dtds/struts-config_1_3.dtd">

 <struts-config>

     <form-beans>

         <form-bean name="loginForm" type="cn.itcast.LoginForm"></form-bean>

     </form-beans>

     <action-mappings>

         <action path="/login" type="cn.itcast.LoginAction" name="loginForm">

             <forward name="loginSuccess" path="/LoginSuccess.jsp"></forward>

             <forward name="loginFailure" path="/LoginFailure.jsp"></forward>

         </action>

     </action-mappings>

 </struts-config>

 package cn.itcast;

 import org.apache.struts.action.ActionForm;

 public class LoginForm extends ActionForm {

     private String username=null;

     private String password=null;

     public String getUsername() {

         return username;

     }

     public void setUsername(String username) {

         this.username = username;

     }

     public String getPassword() {

         return password;

     }

     public void setPassword(String password) {

         this.password = password;

     }

 }

 package cn.itcast;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import org.apache.struts.action.Action;

 import org.apache.struts.action.ActionForm;

 import org.apache.struts.action.ActionForward;

 import org.apache.struts.action.ActionMapping;

 public class LoginAction extends Action {

     @Override

     public ActionForward execute(ActionMapping mapping, ActionForm form,

             HttpServletRequest request, HttpServletResponse response)

             throws Exception {

         LoginForm loginForm=(LoginForm) form;

         if(loginForm.getUsername().equals("itcast")&&loginForm.getPassword().equals("123456")){

             return mapping.findForward("loginSuccess");

         }else{

             return mapping.findForward("loginFailure");

         }

     }

 }