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;
} else
return "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cookie
public 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cookie
public 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cookie
public 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