struts2与cookie结合实现自动登录

一、本文主要介绍struts2与cookie结合实现自动登录

转：http://blog.csdn.net/afgasdg/article/details/6642628

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

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1. <span style="font-size:24px;"><?xml version="1.0" encoding="UTF-8" ?>  
2. <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">  
3. <struts>  
4.     <constant name="struts.i18n.encoding" value="GBK" />  
5.     <package name="user" namespace="/user" extends="struts-default">  
6.         <!-- 用户登录 -->  
7.         <action name="login" class="cn.edu.pdsu.action.LoginAction">  
8.             <result name="success" type="redirect">/success.jsp</result>  
9.             <result name="login">/login.jsp </result>  
10.         </action>  
11.     </package>  
12. </struts></span>  

接着是action文件，LoginAction.java

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1. <span style="font-size:18px;">package cn.edu.pdsu.action;  
2.   
3. import java.util.Map;  
4.   
5. import javax.servlet.http.Cookie;  
6. import javax.servlet.http.HttpServletRequest;  
7. import javax.servlet.http.HttpServletResponse;  
8. import javax.servlet.http.HttpSession;  
9.   
10. import org.apache.struts2.interceptor.ServletRequestAware;  
11. import org.apache.struts2.interceptor.ServletResponseAware;  
12. import org.apache.struts2.interceptor.SessionAware;  
13.   
14. import cn.edu.pdsu.bean.User;  
15. import cn.edu.pdsu.dao.UserDao;  
16. import cn.edu.pdsu.utils.CookieUtils;  
17.   
18. import com.opensymphony.xwork2.ActionSupport;  
19.   
20. public class LoginAction extends ActionSupport implements ServletRequestAware,  
21.         ServletResponseAware, SessionAware {  
22.     private static final long serialVersionUID = 6650955874307814247L;  
23.     public static final String USER_SESSION = "user.session";  
24.     private HttpServletResponse response;  
25.     private HttpServletRequest request;  
26.     private Map<String, Object> session;  
27.     private CookieUtils cookieUtils = new CookieUtils();  
28.     private UserDao userDao = new UserDao();  
29.     private String username;  
30.     private String password;  
31.     private boolean userCookie;  
32.   
33.     // 用户登录跳转  
34.     public String login() {  
35.         if (cookieUtils.getCookie(request, userDao)) {  
36.             return SUCCESS;  
37.         } else  
38.             return "login";  
39.     }  
40.   
41.     @Override  
42.     // 正常登录  
43.     public String execute() throws Exception {  
44.         System.out.println(username + "\t" + password + "\t" + userCookie);  
45.         String username = getUsername().trim();  
46.         if (username != null && !"".equals(username) && password != null  
47.                 && !"".equals(password)) {  
48.             User user = userDao.checkUser(username, password);  
49.             System.out.println(user);  
50.             if (user != null) {  
51.                 // 判断是否要添加到cookie中  
52.                 if (userCookie) {  
53.                     Cookie cookie = cookieUtils.addCookie(user);  
54.                     response.addCookie(cookie);// 添加cookie到response中  
55.                 }  
56.                 // 2.将user 设置到session中  
57.                 session.put(USER_SESSION, user);  
58.                 return SUCCESS;  
59.             }  
60.         }  
61.         this.addFieldError("username", "用户名或密码错误!");  
62.         return "login";  
63.     }  
64.   
65.     // 用户退出  
66.     public String logout() {  
67.         HttpSession session = request.getSession(false);  
68.         if (session != null)  
69.             session.removeAttribute(USER_SESSION);  
70.         Cookie cookie = cookieUtils.delCookie(request);  
71.         if (cookie != null)  
72.             response.addCookie(cookie);  
73.         return "login";  
74.     }  
75.   
76.     public boolean getUserCookie() {  
77.         return userCookie;  
78.     }  
79.   
80.     public void setUserCookie(boolean userCookie) {  
81.         this.userCookie = userCookie;  
82.     }  
83.   
84.     public String getUsername() {  
85.         return username;  
86.     }  
87.   
88.     public void setUsername(String username) {  
89.         this.username = username;  
90.     }  
91.   
92.     public String getPassword() {  
93.         return password;  
94.     }  
95.   
96.     public void setPassword(String password) {  
97.         this.password = password;  
98.     }  
99.   
100.     public void setServletResponse(HttpServletResponse response) {  
101.         this.response = response;  
102.     }  
103.   
104.     public void setSession(Map<String, Object> session) {  
105.         this.session = session;  
106.     }  
107.   
108.     public void setServletRequest(HttpServletRequest request) {  
109.         this.request = request;  
110.     }  
111.   
112. }  
113. </span>  

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

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1. package cn.edu.pdsu.utils;  
2.   
3. import javax.servlet.http.Cookie;  
4. import javax.servlet.http.HttpServletRequest;  
5. import javax.servlet.http.HttpSession;  
6.   
7. import org.apache.commons.lang.StringUtils;  
8.   
9. import cn.edu.pdsu.action.LoginAction;  
10. import cn.edu.pdsu.bean.User;  
11. import cn.edu.pdsu.dao.UserDao;  
12.   
13. /** 
14.  * cookie的增加、删除、查询 
15.  */  
16. public class CookieUtils {  
17.     public static final String USER_COOKIE = "user.cookie";  
18.   
19.     // 添加一个cookie  
20.     public Cookie addCookie(User user) {  
21.         Cookie cookie = new Cookie(USER_COOKIE, user.getUsername() + ","  
22.                 + user.getPassword());  
23.         System.out.println("添加cookie");  
24.         cookie.setMaxAge(60 * 60 * 24 * 14);// cookie保存两周  
25.         return cookie;  
26.     }  
27.   
28.     // 得到cookie  
29.     public boolean getCookie(HttpServletRequest request, UserDao userDAO) {  
30.         Cookie[] cookies = request.getCookies();  
31.         System.out.println("cookies: " + cookies);  
32.         if (cookies != null) {  
33.             for (Cookie cookie : cookies) {  
34.                 System.out.println("cookie: " + cookie.getName());  
35.                 if (CookieUtils.USER_COOKIE.equals(cookie.getName())) {  
36.                     String value = cookie.getValue();  
37.                     if (StringUtils.isNotBlank(value)) {  
38.                         String[] split = value.split(",");  
39.                         String username = split[0];  
40.                         String password = split[1];  
41.                         User user = userDAO.checkUser(username, password);  
42.                         if (user != null) {  
43.                             HttpSession session = request.getSession();  
44.                             session.setAttribute(LoginAction.USER_SESSION, user);// 添加用户到session中  
45.                             return true;  
46.                         }  
47.                     }  
48.                 }  
49.             }  
50.         }  
51.         return false;  
52.     }  
53.   
54.     // 删除cookie  
55.     public Cookie delCookie(HttpServletRequest request) {  
56.         Cookie[] cookies = request.getCookies();  
57.         if (cookies != null) {  
58.             for (Cookie cookie : cookies) {  
59.                 if (USER_COOKIE.equals(cookie.getName())) {  
60.                     cookie.setValue("");  
61.                     cookie.setMaxAge(0);  
62.                     return cookie;  
63.                 }  
64.             }  
65.         }  
66.         return null;  
67.     }  
68. }  

接着上的是用户信息验证类，UserDao.java

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1. package cn.edu.pdsu.dao;  
2.   
3. import cn.edu.pdsu.bean.User;  
4.   
5. /** 
6.  * 用户的有效性校验 
7.  */  
8. public class UserDao {  
9.   
10.     // 模拟查找用户  
11.     public User checkUser(String username, String password) {  
12.         if (username.equals("hello") && password.equals("123")) {  
13.             User user = new User();  
14.             user.setUsername("hello");  
15.             user.setPassword("123");  
16.             return user;  
17.         }  
18.         return null;  
19.     }  
20.   
21. }  

接着就是用户登录页面，login.jsp

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1. <span style="font-size:18px;"><%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>  
2. <%@taglib prefix="s" uri="/struts-tags" %>  
3. <%  
4. String path = request.getContextPath();  
5. String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
6. %>  
7.   
8. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
9. <html>  
10.   <head>  
11.     <base href="<%=basePath%>">  
12.     <title>登录页面</title>  
13.   </head>  
14.   <body>  
15.    <center>  
16.    <s:form action="login" namespace="/user" method="post">  
17.    <s:textfield label="用户名" name="username"></s:textfield>  
18.    <s:password label="密码" name="password"></s:password>  
19.    <s:checkbox label="自动登录" name="userCookie" value="true"></s:checkbox>  
20.    <s:submit value="提交"></s:submit>  
21.    </s:form>  
22.    </center>  
23.   </body>  
24. </html>  
25. </span>  

接着是index.jsp页面

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1. <%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>  
2. <%  
3. String path = request.getContextPath();  
4. String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
5. response.sendRedirect(basePath+"user/login!login.action");  
6. %>  

登录成功页面success.jsp

 

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1. <%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>  
2. <%@taglib prefix="s" uri="/struts-tags" %>  
3. <%  
4. String path = request.getContextPath();  
5. String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
6. %>  
7. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
8. <html>  
9.   <head>  
10.     <base href="<%=basePath%>">  
11.     <title>登录成功！</title>  
12.   </head>  
13.   <body>  
14.     <h1>欢迎您的到来！</h1><br>  
15.     <s:a action="login!logout.action" namespace="/user"> 安全退出</s:a>  
16.   </body>  
17. </html>  

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

转自：http://blog.163.com/ice_box/blog/static/1892060292012447465105/