// Define messageMessage message = new MimeMessage(session);message.setFrom(new InternetAddress(from));message.addRecipient(Message.RecipientType.TO,   new InternetAddress(to));message.setSubject("Hello JavaMail Attachment");// Create the message part BodyPart messageBodyPart = new MimeBodyPart();// Fill the messagemessageBodyPart.setText("Pardon Ideas");Multipart multipart = new MimeMultipart();multipart.addBodyPart(messageBodyPart);// Part two is attachmentmessageBodyPart = new MimeBodyPart();DataSource source = new FileDataSource(filename);messageBodyPart.setDataHandler(new DataHandler(source));messageBodyPart.setFileName(filename);multipart.addBodyPart(messageBodyPart);// Put parts in messagemessage.setContent(multipart);// Send the messageTransport.send(message);

------解决方案--------------------
没做过，但是感觉可以自己解析。打开邮件文件，可以看到基本的邮件结构，其中附件肯定是以BASE64编码放在后面的，把它读出来解析，按照邮件中的文件名存储就可以了。

------解决方案--------------------
学习

------解决方案--------------------

我编过一个从邮箱里获取邮件附件的程序，供楼主参考吧

Java code

import javax.mail.Authenticator;
import javax.mail.Flags;
import javax.mail.Folder;
import javax.mail.Message;
import javax.mail.Multipart;
import javax.mail.Part;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.URLName;

......
public static Folder getMailFolder(String serverString, String username, String password) throws Exception {
        Folder folder = null;
       
        URLName server = new URLName(serverString);
        
        session = Session.getInstance(new Properties(),
                new MailAuthenticator(username, password));

        folder = session.getFolder(server);
        
        System.out.println("\n\n\nFolder retrieved for " + serverString + ", with " + folder.getMessageCount() + " messages");
        
        return folder;
    }

    public static void getEmailWithSubjectContaining(String emailUrl,
            String username, String password, String regex, String filepath,
            boolean addPrefix, boolean delete) throws Exception {
        Folder folder = getMailFolder(emailUrl, username, password);

        if (folder == null)
            return;

        folder.open(Folder.READ_WRITE);

        Message[] msgs = folder.getMessages();

        System.out.println("Totally there are " + msgs.length);
        for (int i = 0; i < msgs.length; i++) {
            String pathToSave = filepath;
            
            String subject = msgs[i].getSubject();

            System.out.println("Email subject: " + subject);

            if (!subject.matches(regex)) {
                System.out.println("Email subject doesn't match regex: " + regex + ", this email is ignored.");
                continue;
            }

            Part p = (Part) msgs[i];

            if (addPrefix) {
                pathToSave = pathToSave + "/" + getFilenamePrefix(subject);
            }

            dumpAttachment(p, pathToSave);

            msgs[i].setFlag(Flags.Flag.DELETED, delete);  //得到邮件后删除
        }

        folder.expunge(); //清除邮箱里DELETE的邮件
        folder.close(false);
    }

    public static void dumpAttachment(Part part, String filepath) throws Exception{
        if (part.isMimeType("text/plain")) {
            System.out.println("This is plain text");
        } else if (part.isMimeType("multipart/*")) {
            System.out.println("This is a Multipart, trying to dig into the attachment now");
            Multipart mp = (Multipart) part.getContent();
            int count = mp.getCount();
            for (int i = 0; i < count; i++)
                dumpAttachment(mp.getBodyPart(i), filepath);
        } else if (part.isMimeType("message/rfc822")) {
            System.out.println("This is a Nested Message");
            dumpAttachment((Part) part.getContent(), filepath);
        } else {
            Object o = part.getContent();
            String attachmentFilename = "no_name";
            if (part.getFileName() != null && !part.getFileName().equals("")) {
                attachmentFilename = part.getFileName();
            }
            
            if (o instanceof String) {
                System.out.println("This is a string");
            } else if (o instanceof InputStream) {
                System.out.println("This is just an input stream");
                InputStream is = (InputStream) o;
                
                FileOutputStream fos = new FileOutputStream(filepath + formatFileExtension(attachmentFilename));
                int c;
                int count = 0;
                System.out.print("Saving attachment: " + formatFileExtension(attachmentFilename));
                while ((c = is.read()) != -1) {
                    fos.write(c);
                    if (count % 1000000 == 0) {
                        System.out.print("\n");
                    } else if (count % 5000 == 0) {
                        System.out.print(".");
                    }
                    
                    count ++;
                }

                System.out.println("\nAttachment " + (format.format((double)count/1024))  + " Kilobytes saved as '" + filepath + formatFileExtension(attachmentFilename) + "'\n");
            } else {
                System.out.println("This is an unknown type");
                System.out.println(o.toString());
            }
        }
    }
......