配置过程如下：
1。将commons-logging-1.1.jar  freemarker-2.3.8.jar  ognl-2.6.11.jar  struts2-core-2.0.6.jar  xwork-2.0.1.jar 复制到lib下
2。修改web.xml


<?xml version="1.0" encoding="UTF-8"?> 
<web-app version="2.4"  
xmlns="http://java.sun.com/xml/ns/j2ee"  
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee  
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> 

<!-- 定义Struts2的FilterDispathcer的Filter --> 
<filter> 
<filter-name>struts2</filter-name> 
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class> 
</filter>
<!-- FilterDispatcher用来初始化struts2并且处理所有的WEB请求。 --> 
<filter-mapping> 
<filter-name>struts2</filter-name> 
<url-pattern>/*</url-pattern> 
</filter-mapping> 
</web-app>
struts.xml


<?xml version="1.0" encoding="GBK"?> 
<!DOCTYPE struts PUBLIC 
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" 
"http://struts.apache.org/dtds/struts-2.0.dtd"> 
<struts> 
<package name="jCuckoo" extends="struts-default"> 
<action name="Login" class="jCuckoo.LoginAction"> 
<result name="input">/login.jsp</result> 
<result name="error">/error.jsp</result> 
<result name="success">/welcome.jsp</result>         
</action> 
</package> 
</struts>
LoginAction



public class LoginAction extends ActionSupport { 
    private String username;
    private String password;
    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; 
    }
    public String execute() throws Exception { 
        if (getUsername().equals("admin") && getPassword().equals("admin")) { 
            ActionContext.getContext().getSession().put("user", getUsername()); 
            return SUCCESS; 
        } else { 
            return ERROR; 
        } 
    }
    @Override 
    public void validate() { 
        if (getUsername() == null || getUsername().trim().equals("")) { 
            addFieldError("username", getText("user.required")); 
        } 
        if (getPassword() == null || getPassword().trim().equals("")) { 
            addFieldError("password", getText("pass.required")); 
        } 
    } 
}
messageResource.properties
loginPage=登陆页面 


errorPage=错误页面 
succPage=成功页面 
failTip=对不起，您不能登录！ 
succTip=欢迎，{0},您已经登录！ 
viewLink=查看作者李刚已出版的图书 
bookPageTitle=作者李刚已出版的图书 
bookName=书名： 
user=用户名 
pass=密  码 
login=登陆 
user.required=用户名必须输入！ 
pass.required=密码必须输入！
login.jsp


<%@ page language="java" contentType="text/html; charset=GBK"%> 
<%@taglib prefix="s" uri="/struts-tags"%> 
<html> 
<head> 
<title><s:text name="loginPage" /> 
</title> 
</head> 
<body> 
<s:form action="Login"> 
<s:textfield name="username" key="user" /> 
<s:textfield name="password" key="pass" /> 
<s:submit key="login" /> 
</s:form> 
</body> 
</html>
error.jsp


<%@ page language="java" contentType="text/html; charset=GBK"%> 
<%@taglib prefix="s" uri="/struts-tags"%>
<html> 
<head> 
<title><s:text name="errorPage"/></title> 
</head> 
<body> 
<s:text name="failTip"/> 
</body> 
</html>
welcome.jsp


<%@ page language="java" contentType="text/html; charset=GBK"%> 
<%@taglib prefix="s" uri="/struts-tags"%> 
<html> 
<head> 
<title><s:text name="succPage"/></title> 
</head> 
<body> 
<s:text name="succTip"> 
<s:param>${sessionScope.user}</s:param> 
</s:text><br> 
<a href="GetBooks.action"><s:text name="viewLink"/></a> 
</body> 
</html>