发送邮件

    //发送邮件方法
    public static void send() {
        try {
            Properties props = new Properties();
            Session session;

            props.put("mail.smtp.auth", 25);
            props.put("mail.smtp.auth", "true");
            props.put("mail.smtp.host", "smtp.163.com");

            PopupAuthenticator popa = new PopupAuthenticator(fromMail, password);           
            session = Session.getDefaultInstance(props, popa);
            Message messages = new MimeMessage(session);
            messages.setFrom(new InternetAddress(fromMail));
            messages.setRecipient(Message.RecipientType.TO, new InternetAddress(toMail)); //接收方邮件地址
            messages.setSubject("邮件标题");
            messages.setSentDate(new Date());            
            messages.setText("你好：\r\n这是一封测试邮件！"); //邮件正文
            messages.saveChanges();

            Transport.send(messages);
        } catch (MessagingException ex) {
            ex.printStackTrace();
        }
    }

//认证
class PopupAuthenticator extends Authenticator {
    String username = null;
    String password = null;
    public PopupAuthenticator() {}

    public PopupAuthenticator(String name, String pwd) {
        username = name;
        password = pwd;
        getPasswordAuthentication();
    }

    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(username, password);
    }
}