java 实现邮箱激活码验证

数据库需要增加两个字段，1.是否激活. 2.激活码。
1.在注册完成的同时，生成一个随机数（例如UUID），保存该随机数到激活码字段，同时设置为未激活。
2.把激活地址URL发送邮件给用户填写的邮箱，URL构成为，处理地址+参数=激活码。
3.用户点击该URL，处理该激活码是否和数据库中的相同，相同则设置该用户激活，同时删除激活码字段。  否则返回错误页面
至于发邮件可以用jemail等第三方J包。
RegisterValidateService.java代码如下：
package com.app.service.impl;

import java.text.ParseException;
import java.util.Date;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.app.dao.UserDao;
import com.app.tools.MD5Tool;
import com.app.tools.MD5Util;
import com.app.tools.SendEmail;
import com.app.tools.ServiceException;
import com.code.model.UserModel;

/**
 * 
 * @author Qixuan.Chen
 */
@Service
public class RegisterValidateService {

    @Autowired
    private UserDao userDao;

    /**
     * 处理注册
     */

    public void processregister(String email){
        UserModel user=new UserModel();
        Long as=5480l;
        user.setId(as);
        user.setName("xiaoming");
        user.setPassword("324545");
        user.setEmail(email);
        user.setRegisterTime(new Date());
        user.setStatus(0);
        ///如果处于安全，可以将激活码处理的更复杂点，这里我稍做简单处理
        //user.setValidateCode(MD5Tool.MD5Encrypt(email));
        user.setValidateCode(MD5Util.encode2hex(email));

        userDao.save(user);//保存注册信息

        ///邮件的内容
        StringBuffer sb=new StringBuffer("点击下面链接激活账号，48小时生效，否则重新注册账号，链接只能使用一次，请尽快激活！</br>");
        sb.append("<a href=\"http://localhost:8080/springmvc/user/register?action=activate&email=");
        sb.append(email); 
        sb.append("&validateCode="); 
        sb.append(user.getValidateCode());
        sb.append("\">http://localhost:8080/springmvc/user/register?action=activate&email="); 
        sb.append(email);
        sb.append("&validateCode=");
        sb.append(user.getValidateCode());
        sb.append("</a>");

        //发送邮件
        SendEmail.send(email, sb.toString());
        System.out.println("发送邮件");

    }

    /**
     * 处理激活
     * @throws ParseException 
     */
      ///传递激活码和email过来
    public void processActivate(String email , String validateCode)throws ServiceException, ParseException{  
         //数据访问层，通过email获取用户信息
        UserModel user=userDao.find(email);
        //验证用户是否存在 
        if(user!=null) {  
            //验证用户激活状态  
            if(user.getStatus()==0) { 
                ///没激活
                Date currentTime = new Date();//获取当前时间  
                //验证链接是否过期 
                currentTime.before(user.getRegisterTime());
                if(currentTime.before(user.getLastActivateTime())) {  
                    //验证激活码是否正确  
                    if(validateCode.equals(user.getValidateCode())) {  
                        //激活成功， //并更新用户的激活状态，为已激活 
                        System.out.println("==sq==="+user.getStatus());
                        user.setStatus(1);//把状态改为激活
                        System.out.println("==sh==="+user.getStatus());
                        userDao.update(user);
                    } else {  
                       throw new ServiceException("激活码不正确");  
                    }  
                } else { throw new ServiceException("激活码已过期！");  
                }  
            } else {
               throw new ServiceException("邮箱已激活，请登录！");  
            }  
        } else {
            throw new ServiceException("该邮箱未注册（邮箱地址不存在）！");  
        }  

    }
}

RegisterController.java代码
package com.app.web.controller;
import java.text.ParseException;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import com.app.service.impl.RegisterValidateService;
import com.app.tools.ServiceException;

@Controller
public class RegisterController {

    @Resource
    private RegisterValidateService service;

    @RequestMapping(value="/user/register",method={RequestMethod.GET,RequestMethod.POST})
    public ModelAndView  load(HttpServletRequest request,HttpServletResponse response) throws ParseException{
        String action = request.getParameter("action");
        System.out.println("-----r----"+action);
        ModelAndView mav=new ModelAndView();
        if("register".equals(action)) {
            //注册
            String email = request.getParameter("email");
            service.processregister(email);//发邮箱激活
            mav.addObject("text","注册成功");
            mav.setViewName("register/register_success");
        } 
        else if("activate".equals(action)) {
            //激活
            String email = request.getParameter("email");//获取email
            String validateCode = request.getParameter("validateCode");//激活码

            try {
                service.processActivate(email , validateCode);//调用激活方法
                mav.setViewName("register/activate_success");
            } catch (ServiceException e) {
                request.setAttribute("message" , e.getMessage());
                mav.setViewName("register/activate_failure");
            }

        }
        return mav;
    }
 
}
UserDao.java（这里个人没有做入库操作，只是利用集合，做过效果出来0_0） 
package com.app.dao;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;

import org.springframework.stereotype.Repository;
import com.code.model.UserModel;
/**
 * 
 * @author Qixuan.Chen
 */
@Repository
public class UserDao {

   public HashMap<String, String> map=new HashMap<String, String>();
    /**
     * @保存注册信息
     *  private Long id;
        private String name;
        private String password;
        private String email;//注册账号
        private int status;//激活状态
        private String validateCode;//激活码
        private Date  registerTime;//注册时间
     */
    public void save(UserModel user){
        System.out.println("cicicici");
        map.put("id", String.valueOf(user.getId()));
        map.put("email", user.getEmail());
        map.put("validateCode", user.getValidateCode());
        SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddhhmmss");
        String time=sdf.format(user.getRegisterTime());
        map.put("registerTime", time);
        int status=user.getStatus();
        map.put("status", String.valueOf(status));
        map.put("name", user.getName());
        String t2=sdf.format(user.getLastActivateTime());
        map.put("activeLastTime", String.valueOf(t2));
        System.out.println("=======s========="+status);

    }

    /**
     * @更新 user
     */
    public void update(UserModel user){
        map.put("email", user.getEmail());
        map.put("validateCode", user.getValidateCode());
        Date time=user.getRegisterTime();
        map.put("registerTime", String.valueOf(time));
        int status=user.getStatus();
        map.put("status", String.valueOf(status));
        System.out.println("=======st========="+status);
    }

    /**
     * @throws ParseException 
     * @查找信息
     */
    public UserModel find(String email) throws ParseException{
        UserModel user=new UserModel();
        user.setEmail(map.get("email"));
        user.setName(map.get("name"));
        SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddhhmmss");
        Date day=sdf.parse(map.get("registerTime"));
        user.setRegisterTime(day);
        user.setStatus(Integer.valueOf(map.get("status")));
        user.setValidateCode(map.get("validateCode"));
        return user;
    }
}

UserModel.java 
package com.code.model;
import java.beans.Transient;
import java.util.Calendar;
import java.util.Date;

public class UserModel {
    private Long id;
 private String name;
 private String password;
 private String email;//注册账号
 private int status=0;//激活状态
 private String validateCode;//激活码
 private Date  registerTime;//注册时间

    
    /////////////////
    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getPassword() {
        return password;
    }

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

    public String getEmail() {
        return email;
    }

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

    public int getStatus() {
        return status;
    }

    public void setStatus(int status) {
        this.status = status;
    }

    public String getValidateCode() {
        return validateCode;
    }

    public void setValidateCode(String validateCode) {
        this.validateCode = validateCode;
    }

    public Date getRegisterTime() {
        return registerTime;
    }

    public void setRegisterTime(Date registerTime) {
        this.registerTime = registerTime;
    }
    /////////////////////////
    @Transient
    public Date getLastActivateTime() {
        Calendar cl = Calendar.getInstance();
        cl.setTime(registerTime);
        cl.add(Calendar.DATE , 2);

        return cl.getTime();
    }

}

SendEmail.java文件
package com.app.tools;
import java.util.Date;
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

/**
 * 
 * @author Qixuan.Chen
 */
public class SendEmail {

    public static final String HOST = "smtp.163.com";
    public static final String PROTOCOL = "smtp";   
    public static final int PORT = 25;
    public static final String FROM = "xxxxx@xx.com";//发件人的email
    public static final String PWD = "123456";//发件人密码

    /**
     * 获取Session
     * @return
     */
    private static Session getSession() {
        Properties props = new Properties();
        props.put("mail.smtp.host", HOST);//设置服务器地址
        props.put("mail.store.protocol" , PROTOCOL);//设置协议
        props.put("mail.smtp.port", PORT);//设置端口
        props.put("mail.smtp.auth" , true);

        Authenticator authenticator = new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(FROM, PWD);
            }

        };
        Session session = Session.getDefaultInstance(props , authenticator);

        return session;
    }

    public static void send(String toEmail , String content) {
        Session session = getSession();
        try {
            System.out.println("--send--"+content);
            // Instantiate a message
            Message msg = new MimeMessage(session);

            //Set message attributes
            msg.setFrom(new InternetAddress(FROM));
            InternetAddress[] address = {new InternetAddress(toEmail)};
            msg.setRecipients(Message.RecipientType.TO, address);
            msg.setSubject("账号激活邮件");
            msg.setSentDate(new Date());
            msg.setContent(content , "text/html;charset=utf-8");

            //Send the message
            Transport.send(msg);
        }
        catch (MessagingException mex) {
            mex.printStackTrace();
        }
    }
}

MD5Util.java 文件
package com.app.tools;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5Util {

 /**
  * 将源字符串使用MD5加密为字节数组
  * @param source
  * @return
  */
 public static byte[] encode2bytes(String source) {
  byte[] result = null;
  try {
   MessageDigest md = MessageDigest.getInstance("MD5");
   md.reset();
   md.update(source.getBytes("UTF-8"));
   result = md.digest();
  } catch (NoSuchAlgorithmException e) {
   e.printStackTrace();
  } catch (UnsupportedEncodingException e) {
   e.printStackTrace();
  }

  return result;
 }

 /**
  * 将源字符串使用MD5加密为32位16进制数
  * @param source
  * @return
  */
 public static String encode2hex(String source) {
  byte[] data = encode2bytes(source);
  StringBuffer hexString = new StringBuffer();
  for (int i = 0; i < data.length; i++) {
   String hex = Integer.toHexString(0xff & data[i]);

   if (hex.length() == 1) {
    hexString.append('0');
   }

   hexString.append(hex);
  }

  return hexString.toString();
 }

 /**
  * 验证字符串是否匹配
  * @param unknown 待验证的字符串
  * @param okHex 使用MD5加密过的16进制字符串
  * @return 匹配返回true，不匹配返回false
  */
 public static boolean validate(String unknown , String okHex) {
  return okHex.equals(encode2hex(unknown));
 }

}

ServiceException.java 
package com.app.tools;
public class ServiceException extends Exception {
 private static final long serialVersionUID = -1708015121235851228L;

 public ServiceException(String message) {
  super(message);
 }
}

jsp页面
1、registerEmailValidae.jsp
<h2>注册激活</h2>
    <form action="user/register?action=register" method="post">
        Email:<input type="text" id="email" name="email" value="" >
        <input type="submit" value="提交">
    </form>
2、register_success.jsp
 <body>
    恭喜你注册成功！请到注册的邮箱点击链接激活！
  </body>
3、activate_success.jsp
<body>
    账号激活成功，点击这里去登录！
  </body>
4、activate_failure.jsp:
<body>
    激活失败！错误信息：${message }
  </body>