How to add a MimeMultipart to another one?

问题

This is possibly a very stupid question, but I'm trying to compose an Email message like suggested here

multipart/mixed
- multipart/alternative
  - text/html
  - text/plain
- attachment 1
- attachment 2

So I'm having

MimeMultipart altPart = new MimeMultipart("alternative");

BodyPart textPart = new MimeBodyPart();
textPart.setContent("someText", "text/plain");
altPart.addBodyPart(textPart);

BodyPart htmlPart = new MimeBodyPart();
htmlPart.setContent("someHtml", "text/html");
altPart.addBodyPart(htmlPart);

MimeMultipart mixedPart = new MimeMultipart("multipart/mixed");

and need to add altPart to mixedPart, but I can't as the only adding method accepts BodyPart only. WTF?

^{Note that unlike here, I'm not mixing up packages.}

回答1:

You need to wrap your MimeMultipart in another MimeBodyPart, using the MimeBodyPart.setContent(Multipart mp) method. Then you can add the MimeBodyPart to the mixedPart Object:

MimeMultipart alternativeMultipart = new MimeMultipart("alternative");

BodyPart textPart = new MimeBodyPart();
textPart.setContent("someText", "text/plain");
alternativeMultipart.addBodyPart(textPart);

BodyPart htmlPart = new MimeBodyPart();
htmlPart.setContent("someHtml", "text/html");
alternativeMultipart.addBodyPart(htmlPart);

MimeBodyPart alternativeBodyPart = new MimeBodyPart();
alternativeBodyPart.setContent(alternativeMultipart);

MimeMultipart mixedMultipart = new MimeMultipart("mixed");
mixedMultipart.addBodyPart(alternativeBodyPart);

MimeBodyPart textPart1 = new MimeBodyPart();
textPart1.setContent("someOtherText", "text/plain");
mixedMultipart.addBodyPart(textPart1);

来源：https://stackoverflow.com/questions/29549863/how-to-add-a-mimemultipart-to-another-one

标签

java

javax.mail