如何使用Javamail API读取eml文件中包含的eml文件

Properties properties = new Properties();
properties.setProperty("mail.host", "your_mail_host");
Session session = Session.getDefaultInstance(properties);

File emlFile = new File("path_to_eml_file");
InputStream inputStream = new FileInputStream(emlFile);
MimeMessage message = new MimeMessage(session, inputStream);

Address[] fromAddresses = message.getFrom();
for (Address address : fromAddresses) {
    String from = address.toString();
    System.out.println("发件人：" + from);
}

Address[] toAddresses = message.getRecipients(Message.RecipientType.TO);
for (Address address : toAddresses) {
    String to = address.toString();
    System.out.println("收件人：" + to);
}

String subject = message.getSubject();
System.out.println("主题：" + subject);

Object content = message.getContent();
if (content instanceof Multipart) {
    Multipart multipart = (Multipart) content;
    for (int i = 0; i < multipart.getCount(); i++) {
        BodyPart bodyPart = multipart.getBodyPart(i);
        if (bodyPart.isMimeType("text/plain")) {
            String text = bodyPart.getContent().toString();
            System.out.println("正文：" + text);
        }
    }
}

Multipart multipart = (Multipart) message.getContent();
for (int i = 0; i < multipart.getCount(); i++) {
    BodyPart bodyPart = multipart.getBodyPart(i);
    if (!Part.ATTACHMENT.equalsIgnoreCase(bodyPart.getDisposition())) {
        continue; // 跳过非附件部分
    }
    String fileName = bodyPart.getFileName();
    InputStream attachmentStream = bodyPart.getInputStream();
    // 处理附件内容
}

inputStream.close();