How to embed images in HTML mail using JavaMail

/* How to embed images in HTML mail using JavaMail */
// Create message

Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to, false));
message.setSubject(subject);

// Add html content
// Specify the cid of the image to include in the email

String html = "Test email ";
Multipart mp = new MimeMultipart();
MimeBodyPart htmlPart = new MimeBodyPart();
htmlPart.setContent(html, "text/html");
mp.addBodyPart(htmlPart);

// add image in another part

MimeBodyPart imagePart = new MimeBodyPart();
DataSource fds = new FileDataSource(imagePath);
imagePart.setDataHandler(new DataHandler(fds));
// assign a cid to the image
imagePart.setHeader("Content-ID", "my-image-id");
mp.addBodyPart(imagePart);

message.setContent(mp);

// Send the message

Transport.send(message);