j2ee中实现cookie的自动登录_各类编程

1.用到的常量
Java代码
package com.hydom.util;

public final class CommonConstants {

    // 系统 session 用户
    public final static String SESSION_USER = "session_user";

    /** 保存在浏览器中cookie的邮箱名称名 */
    public final static String BROWSER_COOKIE_EMAIL = "HKPhotoUserEmail";

    /** 保存在浏览器中cookie的邮箱密码名 */
    public final static String BROWSER_COOKIE_PASSWORD = "HKPhotoUserPassword";

    /** 保存在浏览器中cookie的最大时间15天 */
    public final static int BROWSER_COOKIE_MAX_AGE = 15*24*60*60;

    /** 保存在浏览器中cookie的自动登录状态名 */
    public final static String BROWSER_COOKIE_AUTO_STATUS_NAME = "HKPhotoAutoLoginStatus";

    /** 保存在浏览器中cookie的退出登录名 */
    public final static String BROWSER_COOKIE_LOGIN_OUT_NAME = "HKPhotoLoginOut";
}

2.过滤器
Java代码
package com.hydom.filter;

import java.io.IOException;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.hydom.entity.User;
import com.hydom.service.IUserService;
import com.hydom.util.CommonConstants;
import com.hydom.util.pico.PicoContainer;

/**
*功能：首先检测session中是否有user，如果没有再检测cookie中是否有对应的邮箱和密码<BR>
* 如果有那么就查出该user放进session中<BR>
* 如果都没有那么就doFilter()<BR>
*
* @author ocaicai@yeah.net<BR>
* @date 2011-9-22<BR>
* @version 1.0 <BR>
*
*/
public class CookieLoginFilter extends BaseFilter {
    // 获取数据层示例

    @Override
    public void doFilter(ServletRequest req, ServletResponse res,
            FilterChain chain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;

        Object object = request.getSession().getAttribute(
                CommonConstants.SESSION_USER);

        User cookieUser = null;
        String email = null;
        String password = null;
        String autoStatus = null;

        if (object == null) {
            Cookie[] cookies = request.getCookies();
            if (cookies != null && cookies.length > 0) {
//              System.out.println("cookies.length=" + cookies.length);
                for (int i = 0; i < cookies.length; i++) {
                    Cookie cookie = cookies[i];

                    // 判断Cookie的邮箱名是否等于"HKPhotoUserEmail"
                    if (CommonConstants.BROWSER_COOKIE_EMAIL.equals(cookie
                            .getName())) {
                        email = cookie.getValue().trim();
                    }

                    // 判断Cookie的密码名是否等于"HKPhotoUserPassword"
                    if (CommonConstants.BROWSER_COOKIE_PASSWORD.equals(cookie
                            .getName())) {
                        password = cookie.getValue().trim();
                    }

                    // 判断Cookie的自动登录状态名是否等于"HKPhotoAutoLoginStatus"
                    if (CommonConstants.BROWSER_COOKIE_AUTO_STATUS_NAME
                            .equals(cookie.getName())) {
                        autoStatus = cookie.getValue().trim();
                    }
                }
                if (autoStatus!=null&&autoStatus.equals("1")) {
                    if (email != null && password != null && email.length() > 0
                            && password.length() > 0) {
                        cookieUser = new User();
                        cookieUser.setEmail(email);
                        cookieUser.setPassword(password);

//                      System.out.println("email=" + cookieUser.getEmail());
//                      System.out.println("password="
//                              + cookieUser.getPassword());

                        IUserService userService = PicoContainer.PICO
                                .getComponent(IUserService.class);
                        cookieUser = userService.validLogin(cookieUser);

                        if (cookieUser != null) {
                            // 将该user放入到session中
                            request.getSession().setAttribute(
                                    CommonConstants.SESSION_USER, cookieUser);
                        } else {
                            chain.doFilter(request, response);
                        }
                    } else {
                        chain.doFilter(request, response);
                    }
                } else {
                    chain.doFilter(request, response);
                }

            } else {
                chain.doFilter(request, response);
            }
        } else {
            chain.doFilter(request, response);
        }
    }

}

3.web.xml配置cookie登录过滤器

Xml代码

<filter>
    <filter-name>cookie-login-filter</filter-name>
    <filter-class>com.hydom.filter.CookieLoginFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>cookie-login-filter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

4.用户登录时

Java代码
public class LoginAction extends BaseAction {
    private static final long serialVersionUID = 1L;
    private String email = null;// 用户邮箱
    private String password = null;// 用户密码
    private boolean autoLoginStatus = false;

    public boolean getAutoLoginStatus() {
        return autoLoginStatus;
    }

    public void setAutoLoginStatus(boolean autoLoginStatus) {
        this.autoLoginStatus = autoLoginStatus;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    // 获取数据层示例
    private IUserService userService = PicoContainer.PICO
            .getComponent(IUserService.class);
        @Override
    public String execute() throws Exception {
        try {
            // 验证用户信息
            String message = checkAndFilterUsersInfo();
            ;
            User user = null;
            if (message == null) {
                user = new User();
                user.setEmail(this.email);
                user.setPassword(this.password);
                user = userService.validLogin(user);
            }

            // 输出结果
            StringBuilder msg = new StringBuilder();
            msg.append("{");
            if (user != null) {
                super.getSession().setAttribute(CommonConstants.SESSION_USER,
                        user);
                msg.append("msg:'success'").append(",");
                msg.append("userName:'").append(user.getUserName()).append("'");

                if (autoLoginStatus) {
                    // 根据选择状态判断是否将用户邮箱和密码信息保存在客户端浏览器
                    addCookieingUserToResponse(user);
                }else{
                    removeCookieingUserInResponse();
                }

            } else {
                if (message == null) {
                    msg.append("msg:'帳號或者密碼錯誤'");
                } else {
                    msg.append("msg:'").append(message).append("'");
                }
            }

            msg.append("}");
            ajaxJson(msg.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 将用户邮箱和密码信息添加到响应中
     *
     * @param cookieingUser
     */
    private void addCookieingUserToResponse(User cookieingUser) {

        // 设置cookie邮箱名值对
        Cookie cookieEmail = new Cookie(CommonConstants.BROWSER_COOKIE_EMAIL,
                cookieingUser.getEmail());
        cookieEmail.setMaxAge(CommonConstants.BROWSER_COOKIE_MAX_AGE);
        cookieEmail.setPath(super.getRequest().getContextPath());
        super.getResponse().addCookie(cookieEmail);

        // 设置cookie密码名值对
        Cookie cookiePassword = new Cookie(
                CommonConstants.BROWSER_COOKIE_PASSWORD, cookieingUser
                        .getPassword());
        cookiePassword.setMaxAge(CommonConstants.BROWSER_COOKIE_MAX_AGE);
        cookiePassword.setPath(super.getRequest().getContextPath());
        super.getResponse().addCookie(cookiePassword);


        // 设置cookie自动登录状态名值对
        Cookie autoLoginStatusCookie = new Cookie(
                CommonConstants.BROWSER_COOKIE_AUTO_STATUS_NAME,
                "1");
        autoLoginStatusCookie
                .setMaxAge(CommonConstants.BROWSER_COOKIE_MAX_AGE);
        autoLoginStatusCookie.setPath(super.getRequest()
                .getContextPath());
        super.getResponse().addCookie(autoLoginStatusCookie);

        // 设置cookie登出名值对
        Cookie loginOutCookie = new Cookie(
                CommonConstants.BROWSER_COOKIE_LOGIN_OUT_NAME,
                "0");
        loginOutCookie
                .setMaxAge(CommonConstants.BROWSER_COOKIE_MAX_AGE);
        loginOutCookie.setPath(super.getRequest()
                .getContextPath());
        super.getResponse().addCookie(loginOutCookie);
    }

    public void removeCookieingUserInResponse(){
        // 设置cookie邮箱名值对
        Cookie cookieEmail = new Cookie(CommonConstants.BROWSER_COOKIE_EMAIL,
                null);
        cookieEmail.setMaxAge(CommonConstants.BROWSER_COOKIE_MAX_AGE);
        cookieEmail.setPath(super.getRequest().getContextPath());
        super.getResponse().addCookie(cookieEmail);

        // 设置cookie密码名值对
        Cookie cookiePassword = new Cookie(
                CommonConstants.BROWSER_COOKIE_PASSWORD, null);
        cookiePassword.setMaxAge(CommonConstants.BROWSER_COOKIE_MAX_AGE);
        cookiePassword.setPath(super.getRequest().getContextPath());
        super.getResponse().addCookie(cookiePassword);


        // 设置cookie自动登录状态名值对
        Cookie autoLoginStatusCookie = new Cookie(
                CommonConstants.BROWSER_COOKIE_AUTO_STATUS_NAME,
                "0");
        autoLoginStatusCookie
                .setMaxAge(CommonConstants.BROWSER_COOKIE_MAX_AGE);
        autoLoginStatusCookie.setPath(super.getRequest()
                .getContextPath());
        super.getResponse().addCookie(autoLoginStatusCookie);

        // 设置cookie登出名值对
        Cookie loginOutCookie = new Cookie(
                CommonConstants.BROWSER_COOKIE_LOGIN_OUT_NAME,
                "0");
        loginOutCookie
                .setMaxAge(CommonConstants.BROWSER_COOKIE_MAX_AGE);
        loginOutCookie.setPath(super.getRequest()
                .getContextPath());
        super.getResponse().addCookie(loginOutCookie);
    }
}

5.退出

Java代码
public class LogOutAction extends BaseAction {
    private static final long serialVersionUID = 1L;

    // 用户登出
    @Override
    public String execute() throws Exception {
        super.getSession().removeAttribute(CommonConstants.SESSION_USER);

        // 设置cookie登出名值对
        Cookie loginOutCookie = new Cookie(
                CommonConstants.BROWSER_COOKIE_LOGIN_OUT_NAME,
                "1");
        loginOutCookie
                .setMaxAge(CommonConstants.BROWSER_COOKIE_MAX_AGE);
        loginOutCookie.setPath(super.getRequest()
                .getContextPath());
        super.getResponse().addCookie(loginOutCookie);

        // 设置cookie自动登录状态名值对
        Cookie autoLoginStatusCookie = new Cookie(
                CommonConstants.BROWSER_COOKIE_AUTO_STATUS_NAME,
                "0");
        autoLoginStatusCookie
                .setMaxAge(CommonConstants.BROWSER_COOKIE_MAX_AGE);
        autoLoginStatusCookie.setPath(super.getRequest()
                .getContextPath());
        super.getResponse().addCookie(autoLoginStatusCookie);

        PrintWriter out = super.getResponse().getWriter();
        out.close();
        return null;
    }

}

6.jsp登录页面

Html代码
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<script src="<%=base%>js/common/jquery.js"></script>
<script src="<%=base%>js/common/jquery.cookie.js"></script>
<script type="text/javascript">
$(document).ready(function() {
    var email=$.cookie('<%=CommonConstants.BROWSER_COOKIE_EMAIL%>');
    var password=$.cookie('<%=CommonConstants.BROWSER_COOKIE_PASSWORD%>');
    var autoStatus=$.cookie('<%=CommonConstants.BROWSER_COOKIE_AUTO_STATUS_NAME%>');
    var loginOut=$.cookie('<%=CommonConstants.BROWSER_COOKIE_LOGIN_OUT_NAME%>');

    if(autoStatus=="0"&&loginOut=="1"){
        $("#newemail").attr("value",email.replace(new RegExp('"',"gm"),""));
        $("#newpassword").attr("value",password.replace(new RegExp('"',"gm"),""));
    }

});
</script>

<div class="hidden" id="smallLay">
              <span><a href="javascript:closedialog()" onFocus="this.blur()" > <img src="<%=base%>images/cose.gif" /></a></span>
              <p class="logo"><img onerror="this.src='<%=base%>images/logo.jpg'" src="<%=base%><%=logo.getSmallPath()%>" /></p>
              <div class="user">
                  <ul>
                      <li><b>郵箱：</b><input type="text" id="newemail" onblur="checkAdminEmail(this.value)" value=""/></li>
                      <li><b>密碼：</b><input type="password" id="newpassword" value=""/></li>
                  </ul>
                  <samp><input name="autoLoginStatus" id="autoLoginStatus" checked="checked" type="checkbox" value="" class="check"/><d>下次自動登陸</d> <a href="javascript:startRegister()" style="color:red;text-decoration: underline;"">忘記密碼</a></samp>
                  <p><input type="button" class="land" onclick="gologin()" value="登录"/></p>
                  <samp><b>使用合作網站帳號登陸：</b><img src="<%=base%>images/f.gif" onclick="tofacelogin()"/><u></u><img src="<%=base%>images/sina.gif" /></samp>
              </div>
</div>

作者“成功需要沉寂时间来练功”

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