java 邮箱验证

1.需要加入发送邮件的mail.jar：

http://www.oracle.com/technetwork/java/javamail/index-138643.html

2.将字符串通过MD5进行加密的工具类：

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

/**
 * 创建人： zy
 * 创建时间： 2014年10月22日 下午2:36:19
 * 类描述：将字符串进行加密的工具类
 */
public class MD5Util {

    /**
     * 将源字符串通过MD5进行加密为字节数组
     * @param source
     * @return
     */
    public static byte[] encodeToBytes(String source) {
        byte[] result  = null;
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.reset();//重置
            md.update(source.getBytes("UTF-8"));//添加需要加密的源
            result = md.digest();//加密
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 将源字符串通过MD5加密成32位16进制数
     * @param source
     * @return
     */
    public static String encodeToHex(String source) {
        byte[] data = encodeToBytes(source);//先加密为字节数组
        StringBuffer hexSb = new StringBuffer();
        for (int i = 0; i < data.length; i++) {
            String hex = Integer.toHexString(0xff & data[i]);
            if (hex.length() == 1) {
                hexSb.append("0");
            }
            hexSb.append(hex);
        }
        return hexSb.toString();
    }

    /**
     * 验证字符串是否匹配
     * @param unknown   待验证的字符串
     * @param okHex     使用MD5加密后的16进制字符串
     * @return
     */
    public static boolean validate(String unknown , String okHex) {
        return okHex.equals(encodeToHex(unknown));
    }
}

3.发送邮件的工具类：

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.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

/**
 * 创建人： zy
 * 创建时间： 2014年10月22日 下午3:04:11
 * 类描述：发送邮件工具类
 */
public class SendMailUtil {

    public static final String HOST = "smtp.163.com";
    public static final String PROTOCOL = "smtp";
    public static final int PORT = 25;
    public static final String SENDER = "***@163.com";//此处需要与host相同的网站
    public static final String SENDERPWD = "********";

    /**
     * 获取用于发送邮件的Session
     * @return
     */
    public 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(SENDER, SENDERPWD);
            }
        };
        Session session = Session.getDefaultInstance(props,authenticator);
        return session;
    }

    /**
     * 发送邮件
     * @param receiver
     * @param content
     */
    public static void send(String receiver, String content) {
        Session session = getSession();
        try {
            System.out.println("-------开始发送-------");
            Message msg = new MimeMessage(session);
            //设置message属性
            msg.setFrom(new InternetAddress(SENDER));
            InternetAddress[] addrs = {new InternetAddress(receiver)};
            msg.setRecipients(Message.RecipientType.TO, addrs);
            msg.setSubject("开心网-帐号激活");
            msg.setSentDate(new Date());
            msg.setContent(content,"text/html;charset=utf-8");
            //开始发送
            Transport.send(msg);
                        System.out.println("-------发送完成-------");
        } catch (AddressException e) {
            e.printStackTrace();
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}

 4.发送邮件的Servlet或Action：

User user = userDao.getUser();
if (user != null && user.getQybj() != 1) {
    String email = user.getEmail();
    StringBuffer content = new StringBuffer("<h2>请点击下面的链接激活帐号，链接只能使用一次，请尽快激活！</h2>");
    String nameMd5 = MD5Util.encodeToHex(user.getUsername()+"审核通过");//创建加密字符串
    content.append("<a style='font-size:16px;' href='http://localhost:8080/czfc/register.reg?doType=activate&")
    .append("email=" + email + "&name=" + nameMd5 +"'>")
    .append("http://localhost:8080/czfc/register.reg?doType=activate&")
    .append("email=" + email + "&name=" + nameMd5 + "</a><br/><br/>")
    .append("<span style='color:blue;font-size:20px;font-weight:bold;'>———浙江常山欢迎您！<span>");
    SendMailUtil.send(email, content.toString());//开始发送邮件
}

5.点击链接验证的Servlet或Action：

String userName = request.getParameter("name");
String email = request.getParameter("email");
UserPostDao userDao = new UserPostDao();
User user = userDao.getUserByEmail(email);
if (user == null) {
    destination = "/register/activeFail.jsp";
    request.setAttribute("msg", "链接错误");
}
else {
    String userNameMd5 = MD5Util.encodeToHex(user.getUsername()+"审核通过");
    if (!(userName.equals(userNameMd5)) {
        request.setAttribute("msg", "链接错误");
        destination = "/register/activeFail.jsp";
    }
    else {
        boolean done = userDao.updateUserStatusByEmail(email, 1);
        if (done) {
            request.setAttribute("userId", user.getUserid());
            request.setAttribute("userName", user.getUsername());
            destination = "/register/activeSuccess.jsp";
        }
        else {
            request.setAttribute("msg", "激活出错");
            destination = "/register/activeFail.jsp";
        }
    }
}