folone folone - 1 year ago 156
Java Question

Download attachments using Java Mail

Now that I`ve downloaded all the messages, and store them to

Message[] temp;

How do I get the list of attachments for each of those messages to

List<File> attachments;

Note: no thirdparty libs, please, just JavaMail.

Answer Source

Without exception handling, but here goes:

List<File> attachments = new ArrayList<File>();
for (Message message : temp) {
    Multipart multipart = (Multipart) message.getContent();
    // System.out.println(multipart.getCount());

    for (int i = 0; i < multipart.getCount(); i++) {
        BodyPart bodyPart = multipart.getBodyPart(i);
        if(!Part.ATTACHMENT.equalsIgnoreCase(bodyPart.getDisposition()) &&
               !StringUtils.isNotBlank(bodyPart.getFileName())) {
            continue; // dealing with attachments only
        InputStream is = bodyPart.getInputStream();
        File f = new File("/tmp/" + bodyPart.getFileName());
        FileOutputStream fos = new FileOutputStream(f);
        byte[] buf = new byte[4096];
        int bytesRead;
        while((bytesRead =!=-1) {
            fos.write(buf, 0, bytesRead);
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