我正在尝试使用

java发送每封电子邮件的日历邀请.收件人收到电子邮件,但该活动不会显示接受或拒绝的邀请,而是自动添加到他的日历中.

我正在使用ical4j.jar构建活动/邀请

private Calendar getInvite(Session session) {

Calendar calendar = new Calendar();

calendar.getProperties().add(Version.VERSION_2_0);

calendar.getProperties().add(Method.REQUEST);

VEvent event = new VEvent(

new DateTime(sesion.getStartDate()),

new DateTime(sesion.getEndDate()),

session.getName());

event.getProperties().add(Priority.MEDIUM);

event.getProperties().add(Clazz.PUBLIC);

try {

UidGenerator ug = new UidGenerator("uidGen");

Uid uid = ug.generateUid();

event.getProperties().add(uid);

} catch (SocketException e) {

// Log things

}

for (Participant participant : session.getParticipants()) {

Attendee attendee = new Attendee(URI.create("mailto:" + participant.getEmail()));

attendee.getParameters().add(Role.OPT_PARTICIPANT);

attendee.getParameters().add(new Cn(participant.getName()));

attendee.getParameters().add(PartStat.NEEDS_ACTION);

event.getProperties().add(attendee);

}

calendar.getComponents().add(event);

return calendar;

}

这就是我发送电子邮件的方式：

public void sendEmail(String fromMail, String toMail, String subject, String text, net.fortuna.ical4j.model.Calendar calendar) {

try {

Session session = Session.getInstance(getMailProperties(), new javax.mail.Authenticator() {

protected PasswordAuthentication getPasswordAuthentication() {

return new PasswordAuthentication(getUser(), getPassword());

}

});

MimeMessage mimeMessage = new MimeMessage(session);

mimeMessage.setHeader("Content-Transfer-Encoding:", "7bit");

Address address = new InternetAddress(fromMail);

mimeMessage.setFrom(address);

mimeMessage.setSentDate(Calendar.getInstance().getTime());

mimeMessage.setRecipients(Message.RecipientType.TO, toMail);

mimeMessage.setSubject(subject);

Calendar cal = Calendar.getInstance();

mimeMessage.setSentDate(cal.getTime());

Multipart multipart = new MimeMultipart("alternative");

// First part - HTML readable text

MimeBodyPart msgHtml = new MimeBodyPart();

msgHtml.setContent(text, "text/html; charset=UTF-8");

multipart.addBodyPart(msgHtml);

if (calendar != null) {

// Another part for the calendar invite

MimeBodyPart invite = new MimeBodyPart();

invite.setHeader("Content-Class", "urn:content- classes:calendarmessage");

invite.setHeader("Content-ID", "calendar_message");

invite.setHeader("Content-Disposition", "inline");

invite.setContent(calendar.toString(), "text/calendar");

multipart.addBodyPart(invite);

}

mimeMessage.setContent(multipart);

Transport.send(mimeMessage);

} catch (Exception e) {

// Log things

}

}

但是当我收到电子邮件(在Gmail中)时,我看不到邀请,该事件会自动添加到我的日历中.我只能通过点击日历中的活动来接受或拒绝.

我试图发送邀请,然后发生的是我收到一封带有ics附件的电子邮件.

我错过了什么？