Download attachments using Java Mail

user_163423 0
Viewed 83953

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.

jakarta-mail attachment java
5 Answers

Returns list of body parts with attachments.

@Throws(Exception::class)
    fun getAttachments(message: Message): List<BodyPart>{
        val content = message.content
        if (content is String) return ArrayList<BodyPart>()
        if (content is Multipart) {
            val result: MutableList<BodyPart> = ArrayList<BodyPart>()
            for (i in 0 until content.count) {
                result.addAll(getAttachments(content.getBodyPart(i)))
            }
            return result
        }
        return ArrayList<BodyPart>()
    }

    @Throws(Exception::class)
    private fun getAttachments(part: BodyPart): List<BodyPart> {
        val result: MutableList<BodyPart> = ArrayList<BodyPart>()

        if (Part.ATTACHMENT == part.disposition && !part.fileName.isNullOrBlank()){
            result.add(part)
        }

        val content = part.content
        if (content is Multipart) {
            for (i in 0 until (content ).count) {
                val bodyPart = content.getBodyPart(i)
                result.addAll(getAttachments(bodyPart)!!)
            }
        }
        return result
    }
user_118435570
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