JAVA

how to fetch email and get there body content in spring boot

    @Throws(IOException::class, MessagingException::class)
    private fun getTextFromMessage(message: Message): String {
        var result: String = ""
        if (message.isMimeType("text/plain")) {
            result = message.content.toString()
        }
        else if (message.isMimeType("multipart/*")) {
            val mimeMultipart =
                message.content as MimeMultipart
            result = getTextFromMimeMultipart(mimeMultipart)
        }
        else if(message.isMimeType("text/html")){
            result = message.content.toString()
        }
        return result
    }

    @Throws(IOException::class, MessagingException::class)
    private fun getTextFromMimeMultipart(
        mimeMultipart: MimeMultipart
    ): String {
        val count = mimeMultipart.count
        if (count == 0) throw MessagingException("Multipart with no body parts not supported.")

        val multipartRelated = ContentType(mimeMultipart.contentType).match("multipart/related")


        if(multipartRelated){
            val part = mimeMultipart.getBodyPart(0)
            val multipartAlt = ContentType(part.contentType).match("multipart/alternative")
            if(multipartAlt) {
                return getTextFromMimeMultipart(part.content as MimeMultipart)
            }
        }else{
            val multipartAlt = ContentType(mimeMultipart.contentType).match("multipart/alternative")
            if (multipartAlt) {
                for (i in 0 until count) {
                    val part = mimeMultipart.getBodyPart(i)
                    if (part.isMimeType("text/html")) {
                        return getTextFromBodyPart(part)
                    }
                }
            }
        }


        var result: String = ""
        for (i in 0 until count) {
            val bodyPart = mimeMultipart.getBodyPart(i)
            result += getTextFromBodyPart(bodyPart)
        }
        return result
    }

    @Throws(IOException::class, MessagingException::class)
    private fun getTextFromBodyPart(
        bodyPart: BodyPart
    ): String {
        var result: String = ""
        if (bodyPart.isMimeType("text/plain")) {
            result = bodyPart.content as String
        } else if (bodyPart.isMimeType("text/html")) {
            val html = bodyPart.content as String
            result = html
        } else if (bodyPart.content is MimeMultipart) {
            result =
                getTextFromMimeMultipart(bodyPart.content as MimeMultipart)
        }
        return result
    }