我正在尝试使用 javamail 和 imap 从我的电子邮件中下载所有新的电子邮件附件。一切正常,但有些附件是 pdf 格式并解码为 BASE64,我的声明
if (msg.getContent() instanceof Multipart)
不要抓住,因为它是 com.sun.mail.util.BASE64DecoderStream@33c7e1bb。
如何获取此附件并将其下载到我的硬盘上?
到目前为止尝试过,第一个 IF 语句使用 Base64 解码捕获附件。
for (Message msg : messages) {
Address[] fromAddress = msg.getFrom();
String from = fromAddress[0].toString();
String subject = msg.getSubject();
String sentDate = msg.getSentDate().toString();
String messageContent = "";
String attachFiles = "";
System.out.println(msg.getContent());
if (msg.getContent() instanceof BASE64DecoderStream)
{
BASE64DecoderStream base64DecoderStream = (BASE64DecoderStream) msg.getContent();
byte[] byteArray = IOUtils.toByteArray(base64DecoderStream);
}
if (msg.getContent() instanceof Multipart) {
Multipart multipart = (Multipart) msg.getContent();
for (int i = 0; i < multipart.getCount(); i++) {
Part part = multipart.getBodyPart(i);
String disposition = part.getDisposition();
if ((disposition != null) &&
((disposition.equalsIgnoreCase(Part.ATTACHMENT) ||
(disposition.equalsIgnoreCase(Part.INLINE))))) {
MimeBodyPart mimeBodyPart = (MimeBodyPart) part;
String fileName = mimeBodyPart.getFileName();
attachFiles += fileName;
File fileToSave = new File(fileName);
mimeBodyPart.saveFile(saveDirectory + File.separator + fileToSave);
System.out.println("saved attachment: " + fileName + " to disk at: " + saveDirectory);
}
}
}
System.out.println("\t From: " + from);
System.out.println("\t Subject: " + subject);
System.out.println("\t Sent Date: " + sentDate);
System.out.println("\t Attachments: " + attachFiles);
System.out.println("");
}
}
如果有一种简单易用的方法可以将附件下载到我的磁盘,也可以使用 NodeJS。尝试了 node-imap 但我在那里遇到了同样的错误。