最重要的文件：struts-config.xml配置文件 <?xml version="1.0" encoding="utf-8" ?> <!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 name="loginFrom" type=""></form-beans>   <action-mappings>     <action path="/login" name="loginFrom" type="">       <forward name="loginSuccess" path="/loginSuccess.jsp"></forward>       <forward name="loginFailure" path="/loginFailure.jsp"></forward>     </action>   </action-mappings> </struts-config>   Web.xml配置文件 <?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>    <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>    <load-on-startup>0</load-on-startup>  </servlet>    <servlet-mapping>    <servlet-name>action</servlet-name>    <url-pattern>*.do</url-pattern>  </servlet-mapping> </web-app> 登录界面 login.jsp <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>  <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html>   <head>          <title>My JSP 'login.jsp' starting page</title>        </head>      <body>   <!-- 这里叫login.do是因为web.xml配置中servlet对所有.do文件起作用，struts-config.xml中action的名字叫login -->     <form action="<%=request.getContextPath()%>/login.do" method="post">     username ： <input type="text" name="username"><br><br>     password ： <input type="text" name="password"><br><br>     <input type="submit" value="login">          </form>   </body> </html>    登录成功后的界面loginSuccess和失败后的界面loginFailure在这里不再赘述，就是输出成功或失败的两句话。 From文件，相当于javabean package itcast.family.cn;  import org.apache.struts.action.ActionForm;  public class LoginFrom 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;  }  } Action文件，相当于servlet package itcast.family.cn;  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 {   //execute是现在struts2常用方法，以前老版本的叫做：perform  @Override  public ActionForward execute(ActionMapping mapping, ActionForm form,    HttpServletRequest request, HttpServletResponse response)    throws Exception {   //第一步强制转换为自己的类   LoginFrom loginFrom = (LoginFrom)form;    //业务逻辑处理   String returnURLKeyWord = null;   if(loginFrom.getUserName().equals("yangkai")){    returnURLKeyWord ="loginSuccess";   }else{    returnURLKeyWord ="loginFailure";       }   //跳转关键字   return mapping.findForward(returnURLKeyWord);  } }