Java实现邮箱找回密码实例代码

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;
/**
 * @author javen
 * @Email zyw205@gmail.com
 * 
 */
public class 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();
    }
    return null;
  }
  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;
  }
  public void setUsers(Users users) {
    this.users = users;
  }
  public UserHander getUserHander() {
    return userHander;
  }
  public void setUserHander(UserHander userHander) {
    this.userHander = userHander;
  }
  public String getEmail() {
    return email;
  }
  public void setEmail(String email) {
    this.email = email;
  }
  public String getSid() {
    return sid;
  }
  public void setSid(String sid) {
    this.sid = sid;
  }
  public String getUserName() {
    return userName;
  }
  public void setUserName(String userName) {
    this.userName = userName;
  }
}

sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
mailMessage.setSubject(MimeUtility.encodeText(mailInfo.getSubject(), "UTF-8", "B"));   //解决linux邮件title乱码