通过邮件找回密码功能的实现
1、最近开发一个系统,有个需求就是,忘记密码后通过邮箱找回。现在的系统在注册的时候都会强制输入邮箱,其一目的就是 通过邮件绑定找回,可以进行密码找回。通过java发送邮件的功能我就不说了,重点讲找回密码。
2、参考别人的思路:发送邮件→请求邮件里的URL→验证url→{验证成功修改密码,不成功跳转到失败页面}
重点就是如何生成这个url和如何解析这个url.
需要注意的是一个url只能修改一次密码,当同一帐号发送多封邮件,只有最后一封邮件的url 邮箱
3、加密能防止伪造攻击,一次url只能验证一次,并且绑定了用户。生成url: 可以用UUID生成随机密钥。
数字签名 = MD5(用户名+'
′ +过期时间+‘
’+密钥key)
数据库字段(用户名(主键),密钥key,过期时间)
url参数(用户名,数字签名) ,密钥key的生成:在每一个用户找回密码时候为这个用户生成一个密钥key ,
url example:http://www.wechat68.com:80/CardSSHOK/checkLink?sid=K3xHOi4o/UihH5QYWBDfYA==&userName=123
生成过期时间,生成数字签名,生成url,发送邮件. AddU(用户名,密钥key,过期时间)
使用到的数据库如下
package com.soq.card.web.action; import java.sql.Timestamp;
import java.util.List;
import java.util.UUID; import org.hibernate.Criteria;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.criterion.Restrictions;
import org.springframework.orm.hibernate3.HibernateTemplate; import com.soq.card.biz.UserHander;
import com.soq.card.entity.Users;
import com.soq.card.tools.DBhepler;
import com.soq.card.tools.Mail;
import com.soq.card.tools.Md5;
import com.soq.card.web.base.BaseAction; publicclass PassEmailAction extends BaseAction {
private Users users;
private UserHander userHander; private String email;
private String sid;
private String userName; public String sendmail() {
try {
HibernateTemplate ht = this.getUserHander().getUsersDAO().getHibernateTemplate();
SessionFactory factory = ht.getSessionFactory();
Session session = factory.openSession();
Criteria criteria = session.createCriteria(Users.class);
criteria.add(Restrictions.eq("loginName", email));
List<Users> list = criteria.list();
if (list.size() > 0) {
users=list.get(0);
Mail mail = new Mail(); String secretKey = UUID.randomUUID().toString(); // 密钥
Timestamp outDate = new Timestamp(System.currentTimeMillis() + 30 * 60 * 1000);// 30分钟后过期long date = outDate.getTime() / 1000 * 1000;// 忽略毫秒数 mySql 取出时间是忽略毫秒数的 DBhepler bhepler=new DBhepler();
String sql="update users set outDate=?,validataCode=? where loginName=?;";
String str[] ={outDate+"",secretKey,users.getLoginName()};
bhepler.AddU(sql, str); //this.getUserHander().getUsersDAO().getHibernateTemplate().update(users); // 保存到数据库
System.out.println(" UserName>>>> "+users.getUserName());
String key =users.getUserName() + "$" + date + "$" + secretKey;
System.out.println(" key>>>"+key);
String digitalSignature = Md5.md5(key);// 数字签名 String path = this.getRequest().getContextPath();
String basePath = this.getRequest().getScheme() + "://"
+ this.getRequest().getServerName() + ":"
+ this.getRequest().getServerPort() + path + "/";
String resetPassHref = basePath + "checkLink?sid="
+ digitalSignature +"&userName="+users.getUserName();
String emailContent = "请勿回复本邮件.点击下面的链接,重设密码<br/><a href="
+ resetPassHref + " target='_BLANK'>" + resetPassHref
+ "</a> 或者 <a href=" + resetPassHref
+ " target='_BLANK'>点击我重新设置密码</a>"
+ "<br/>tips:本邮件超过30分钟,链接将会失效,需要重新申请'找回密码'" + key
+ "\t" + digitalSignature; mail.setTo(email);
mail.setFrom("XX");// 你的邮箱
mail.setHost("smtp.163.com");
mail.setUsername("XXX@163.com");// 用户
mail.setPassword("CXXX");// 密码
mail.setSubject("[二维码名片]找回您的账户密码");
mail.setContent(emailContent);
if (mail.sendMail()) {
System.out.println(" 发送成功");
this.getRequest().setAttribute("mesg", "重置密码邮件已经发送,请登陆邮箱进行重置!");
return "sendMail";
}
} else {
this.getRequest().setAttribute("mesg", "用户名不存在,你不会忘记邮箱了吧?");
return "noUser";
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
returnnull;
} public String checkResetLink() {
System.out.println("sid>>>" + sid); if (sid.equals("") || userName.equals("")) {
this.getRequest().setAttribute("mesg", "链接不完整,请重新生成");
System.out.println(">>>>> null");
return "error";
}
HibernateTemplate ht = this.getUserHander().getUsersDAO().getHibernateTemplate();
SessionFactory factory = ht.getSessionFactory();
Session session = factory.openSession();
Criteria criteria = session.createCriteria(Users.class);
criteria.add(Restrictions.eq("userName", userName));
List<Users> list = criteria.list();
if (list.size()>0) {
users=list.get(0); Timestamp outDate = (Timestamp) users.getOutDate();
System.out.println("outDate>>>"+outDate);
if(outDate.getTime() <= System.currentTimeMillis()){ //表示已经过期this.getRequest().setAttribute("mesg", "链接已经过期,请重新申请找回密码.");
System.out.println("时间 超时");
return "error";
} String key = users.getUserName()+"$"+outDate.getTime()/1000*1000+"$"+users.getValidataCode();//数字签名 System.out.println("key link》》"+key);
String digitalSignature = Md5.md5(key);// 数字签名 System.out.println("digitalSignature>>>>"+digitalSignature);
if(!digitalSignature.equals(sid)) {
this.getRequest().setAttribute("mesg", "链接不正确,是否已经过期了?重新申请吧.");
System.out.println("标示不正确");
return "error";
}else {
//链接验证通过 转到修改密码页面this.getRequest().setAttribute("user", users);
return "success";
}
}else {
this.getRequest().setAttribute("mesg", "链接错误,无法找到匹配用户,请重新申请找回密码.");
System.out.println("用户不存在");
return "error";
}
} public Users getUsers() {
return users;
} publicvoid setUsers(Users users) {
this.users = users;
} public UserHander getUserHander() {
return userHander;
} publicvoid setUserHander(UserHander userHander) {
this.userHander = userHander;
} public String getEmail() {
return email;
} publicvoid setEmail(String email) {
this.email = email;
} public String getSid() {
return sid;
} publicvoid setSid(String sid) {
this.sid = sid;
} public String getUserName() {
return userName;
} publicvoid setUserName(String userName) {
this.userName = userName;
} }