1.  使用容器的MAILSESSION（已定义好服务器属性）

        MimeMessage mimeMsg = new MimeMessage(session);    //创建MIME邮件对象

     .......

      Transport.send(mimeMsg);        //发送邮件

2.使用属性文件MailServer.properties　定义邮件服务器属性

SmtpHost=smtp.163.com
User=lisa_19982000
Password=king
Sender=lisa_19982000@163.com
Subject=Hello

使用类中：

　　　 InputStream is = getClass().getResourceAsStream("MailServer.properties");
            Properties prop = new Properties();
            prop.load(is);
            this.setSmtpHost(prop.get("SmtpHost").toString());
            this.setUser(prop.get("User").toString());
            this.setPassword(prop.get("Password").toString());
            this.setSender(prop.get("Sender").toString());
            this.setSubject(ExStr.CS(prop.get("Subject").toString()));

 　　Properties properties = new Properties();
        properties.put("mail.smtp.host", smtpHost);//设置smtp主机
        properties.put("mail.smtp.auth", "true");//使用smtp身份验证
        //获得邮件会话对象
        Session session = Session.getDefaultInstance(properties,
             new Authenticator(){
               public PasswordAuthentication getPasswordAuthentication(){
                 return new  PasswordAuthentication(user, password);
               }
             });
        //创建MIME邮件对象
        MimeMessage mimeMsg = new MimeMessage(session);
        if (sender != null)//设置发件人地址
            {
                mimeMsg.setFrom(new InternetAddress(sender));
            }
        if (receiver != null)//设置收件人地址
           {
             //  mimeMsg.setRecipients(Message.RecipientType.TO, parse(receiver));
             mimeMsg.setRecipients(Message.RecipientType.TO,InternetAddress.parse(receiver,false));
           }
        if (subject != null)//设置邮件主题
           {
               mimeMsg.setSubject(subject, "GBK");
           }
        Multipart multipart = new MimeMultipart();
        MimeBodyPart part = new MimeBodyPart();//mail内容部分
        //setText method  sets the given String as this part's content,
        //with a MIME type of "text/plain"
        part.setText(content == null ? "" : content, "GBK");
        //设置邮件格式为html,并指定字符集，否则会是乱码
        part.setContent(content.toString(),"text/html;charset=GBK");
        multipart.addBodyPart(part);    //在 Multipart 中增加HTML内容部分
        String file1="E://EKing//DevelopeLearning//J2EE//javamailTest//attach1.txt";
        String file2="E://EKing//DevelopeLearning//J2EE//javamailTest//attach2.txt";
        String[] files = {file1,file2};
        if (files != null && files.length > 0) {                            //邮件附件
         for (int i = 0; i < files.length; i++) {
           MimeBodyPart mbp = new MimeBodyPart();
           FileDataSource fds = new FileDataSource(files[i]);
           mbp.setDataHandler(new DataHandler(fds));
           try{
              mbp.setFileName(MimeUtility.encodeWord(files[i], "GBK", null));
           }catch(Exception e){}
           multipart.addBodyPart(mbp);
         }

  }

        mimeMsg.setContent(multipart);  //增加 Multipart 到信息体
        mimeMsg.setSentDate(new Date()); //设置发送日期
        Transport.send(mimeMsg);        //发送邮件