如何在一个会话中发送多封电子邮件？

这是我的性能测试课程。使用一个连接发送邮件的速度快4倍，然后每次都重新打开连接（使用普通邮件时会发生这种情况）。使用多个线程可以进一步提高性能。

    Properties properties = System.getProperties();    properties.put("mail.smtp.host", server);    properties.put("mail.smtp.port", "" + port);    Session session = Session.getInstance(properties);    Transport transport = session.getTransport("smtp");    transport.connect(server, username, password);    for (int i = 0; i < count; i++) {        Message message = new MimeMessage(session);        message.setFrom(new InternetAddress(from));        InternetAddress[] address = {new InternetAddress(to)};        message.setRecipients(Message.RecipientType.TO, address);        message.setSubject(subject + "JavaMail API");        message.setSentDate(new Date());        setHTMLContent(message);        message.saveChanges();        transport.sendMessage(message, address);    }    transport.close();