Java Email 工具类

import java.util.Date;
import java.util.Properties;

import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;

public class MailUtils {
    /**
     * 发送邮件
     * @param user 发件人邮箱
     * @param password 授权码（注意不是邮箱登录密码）
     * @param host 
     * @param from 发件人
     * @param to 接收者邮箱
     * @param subject 邮件主题
     * @param content 邮件内容
     * @return success 发送成功 failure 发送失败
     * @throws Exception
     */
    public static String sendMail(String reciver, String activecode)
            throws Exception {

        String user = "martin15950621300@126.com";
        String password = "mengxiangjie0319";
        String host = "smtp.126.com";
        String from = "martin15950621300@126.com";
        String subject = "来自智慧书屋的激活邮件。";
        String content = "<!DOCTYPE>"+"<div bgcolor='#f1fcfa'   style='border:1px solid #d9f4ee; font-size:14px; line-height:22px; color:#005aa0;padding-left:1px;padding-top:5px;   padding-bottom:5px;'><span style='font-weight:bold;'>温馨提示：</span>"
                              + "<div style='width:950px;font-family:arial;'>欢迎注册智慧书屋商城会员，<a href='http://localhost:8080/store/UserServlet?method=active&activecode="+activecode+"'>点击这里</a>激活您的帐户。本邮件由系统自动发出，请勿回复。<br/>感谢您的使用。<br/>智慧书屋商城有限公司</div>"
                             +"</div>";

        if (reciver != null){
            Properties props = System.getProperties();
            props.put("mail.smtp.host", host);
            props.put("mail.smtp.auth", "true");
            MailAuthenticator auth = new MailAuthenticator();
            MailAuthenticator.USERNAME = user;
            MailAuthenticator.PASSWORD = password;
            Session session = Session.getInstance(props, auth);
            session.setDebug(true);
            try {
                MimeMessage message = new MimeMessage(session);
                message.setFrom(new InternetAddress(from));
                if (!reciver.trim().equals(""))
                    message.addRecipient(Message.RecipientType.TO,
                            new InternetAddress(reciver.trim()));
                message.setSubject(subject);
                MimeBodyPart mbp1 = new MimeBodyPart(); // 正文
                mbp1.setContent(content, "text/html;charset=utf-8");
                Multipart mp = new MimeMultipart(); // 整个邮件：正文+附件
                mp.addBodyPart(mbp1);
                // mp.addBodyPart(mbp2);
                message.setContent(mp);
                message.setSentDate(new Date());
                message.saveChanges();
                Transport trans = session.getTransport("smtp");
                trans.send(message);
                System.out.println(message.toString());
            } catch (Exception e){
                e.printStackTrace();
                return "failure";
            }
            return "success";
        }else{            
            return "failure";
        }
    }
}

class MailAuthenticator extends Authenticator{
    public static String USERNAME = "";
    public static String PASSWORD = "";

    public MailAuthenticator() {
    }

    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(USERNAME, PASSWORD);
    }
}