Sending a data structure as an attachment via JavaMail

Hi, I've managed to send an email with a file as an attachment through JavaMail. However, I'd like to send a data structure (array, vector, etc.) as the attachment instead. One way of course is to export the data structure as a file and then attach that file, however that seems kind of redundant. Is there a way to directly parse the data structure as an attachment? My current partial code for sending an email with an attachment is

Code:

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public static void sendMail() throws Exception {
                String mailhost = "mailserver.asdasdasd.com";
                String from = "fred_liu@asdasdas.com";
                String sendTo[] = { "fred_liu@dfasfsdfs.com" };
                String sendCC = "";
                String subject = "";
                String message = "";
                String attachment = "C:\\fred.txt";

                Properties prop = System.getProperties();
                Session session = Session.getInstance(prop, null);
                Message msg = new MimeMessage(session);
                prop.put("mail.smtp.host", mailhost);
                msg.setFrom(new InternetAddress(from));
                for (String to : sendTo) {
                        msg.setRecipients(Message.RecipientType.TO,
                                        InternetAddress.parse(to, false));
                        if (sendCC != null && sendCC.length() > 0)
                                msg.setRecipients(Message.RecipientType.CC,
                                                InternetAddress.parse(sendCC, false));
                        msg.setSubject(subject);
                        msg.setSentDate(Calendar.getInstance().getTime());

                        MimeBodyPart messageBodyPart = new MimeBodyPart();

                        messageBodyPart.setContent(message, "text/html");
                        Multipart multipart = new MimeMultipart();

                        multipart.addBodyPart(messageBodyPart);
                       
                        // Attachment
                        messageBodyPart = new MimeBodyPart();
                        DataSource source = new FileDataSource(attachment);
                        messageBodyPart.setDataHandler(new DataHandler(source));
                        messageBodyPart.setFileName(attachment);
                        multipart.addBodyPart(messageBodyPart);

                        msg.setContent(multipart);
                        Transport.send(msg);
                }
        }

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bump bumpbump bump

Try serializing the object...