struts2与cookie实现自动登录

一、本文主要介绍struts2与cookie结合实现自动登录

struts2与cookie结合时要注意采用.action 动作的方式实现cookie的读取。好了直接看代码：

首先是struts2的配置文件：struts.xml

该配置文件，用户验证成功跳转到success.jsp页面。验证失败跳转到Login.jsp页面

项目下载地址：http://download.csdn.net/source/3477755

<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd"><struts><constant name="struts.i18n.encoding" value="GBK" /><package name="user" namespace="/user" extends="struts-default"><!-- 用户登录 --><action name="login" class="cn.edu.pdsu.action.LoginAction"><result name="success" type="redirect">/success.jsp</result><result name="login">/login.jsp </result></action></package></struts>

接着是action文件，LoginAction.java

package cn.edu.pdsu.action;import java.util.Map;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import org.apache.struts2.interceptor.ServletRequestAware;import org.apache.struts2.interceptor.ServletResponseAware;import org.apache.struts2.interceptor.SessionAware;import cn.edu.pdsu.bean.User;import cn.edu.pdsu.dao.UserDao;import cn.edu.pdsu.utils.CookieUtils;import com.opensymphony.xwork2.ActionSupport;public class LoginAction extends ActionSupport implements ServletRequestAware,ServletResponseAware, SessionAware {private static final long serialVersionUID = 6650955874307814247L;public static final String USER_SESSION = "user.session";private HttpServletResponse response;private HttpServletRequest request;private Map<String, Object> session;private CookieUtils cookieUtils = new CookieUtils();private UserDao userDao = new UserDao();private String username;private String password;private boolean userCookie;// 用户登录跳转public String login() {if (cookieUtils.getCookie(request, userDao)) {return SUCCESS;} elsereturn "login";}@Override// 正常登录public String execute() throws Exception {System.out.println(username + "\t" + password + "\t" + userCookie);String username = getUsername().trim();if (username != null && !"".equals(username) && password != null&& !"".equals(password)) {User user = userDao.checkUser(username, password);System.out.println(user);if (user != null) {// 判断是否要添加到cookie中if (userCookie) {Cookie cookie = cookieUtils.addCookie(user);response.addCookie(cookie);// 添加cookie到response中}// 2.将user 设置到session中session.put(USER_SESSION, user);return SUCCESS;}}this.addFieldError("username", "用户名或密码错误!");return "login";}// 用户退出public String logout() {HttpSession session = request.getSession(false);if (session != null)session.removeAttribute(USER_SESSION);Cookie cookie = cookieUtils.delCookie(request);if (cookie != null)response.addCookie(cookie);return "login";}public boolean getUserCookie() {return userCookie;}public void setUserCookie(boolean userCookie) {this.userCookie = userCookie;}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 void setServletResponse(HttpServletResponse response) {this.response = response;}public void setSession(Map<String, Object> session) {this.session = session;}public void setServletRequest(HttpServletRequest request) {this.request = request;}}

接下来是cookie工具类，主要是cookie的添加、删除与查询。CookieUtils.java

package cn.edu.pdsu.utils;import javax.servlet.http.Cookie;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpSession;import org.apache.commons.lang.StringUtils;import cn.edu.pdsu.action.LoginAction;import cn.edu.pdsu.bean.User;import cn.edu.pdsu.dao.UserDao;/** * cookie的增加、删除、查询 */public class CookieUtils {public static final String USER_COOKIE = "user.cookie";// 添加一个cookiepublic Cookie addCookie(User user) {Cookie cookie = new Cookie(USER_COOKIE, user.getUsername() + ","+ user.getPassword());System.out.println("添加cookie");cookie.setMaxAge(60 * 60 * 24 * 14);// cookie保存两周return cookie;}// 得到cookiepublic boolean getCookie(HttpServletRequest request, UserDao userDAO) {Cookie[] cookies = request.getCookies();System.out.println("cookies: " + cookies);if (cookies != null) {for (Cookie cookie : cookies) {System.out.println("cookie: " + cookie.getName());if (CookieUtils.USER_COOKIE.equals(cookie.getName())) {String value = cookie.getValue();if (StringUtils.isNotBlank(value)) {String[] split = value.split(",");String username = split[0];String password = split[1];User user = userDAO.checkUser(username, password);if (user != null) {HttpSession session = request.getSession();session.setAttribute(LoginAction.USER_SESSION, user);// 添加用户到session中return true;}}}}}return false;}// 删除cookiepublic Cookie delCookie(HttpServletRequest request) {Cookie[] cookies = request.getCookies();if (cookies != null) {for (Cookie cookie : cookies) {if (USER_COOKIE.equals(cookie.getName())) {cookie.setValue("");cookie.setMaxAge(0);return cookie;}}}return null;}}

接着上的是用户信息验证类，UserDao.java

package cn.edu.pdsu.dao;import cn.edu.pdsu.bean.User;/** * 用户的有效性校验 */public class UserDao {// 模拟查找用户public User checkUser(String username, String password) {if (username.equals("hello") && password.equals("123")) {User user = new User();user.setUsername("hello");user.setPassword("123");return user;}return null;}}

接着就是用户登录页面，login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%><%@taglib prefix="s" uri="/struts-tags" %><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">    <title>登录页面</title>  </head>  <body>   <center>   <s:form action="login" namespace="/user" method="post">   <s:textfield label="用户名" name="username"></s:textfield>   <s:password label="密码" name="password"></s:password>   <s:checkbox label="自动登录" name="userCookie" value="true"></s:checkbox>   <s:submit value="提交"></s:submit>   </s:form>   </center>  </body></html>

接着是index.jsp页面

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";response.sendRedirect(basePath+"user/login!login.action");%>

登录成功页面success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%><%@taglib prefix="s" uri="/struts-tags" %><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html>  <head>    <base href="<%=basePath%>">    <title>登录成功！</title>  </head>  <body>    <h1>欢迎您的到来！</h1><br>    <s:a action="login!logout.action" namespace="/user"> 安全退出</s:a>  </body></html>

项目下载地址：http://download.csdn.net/source/3477755