将附件添加到现有的eml文件 [英] Add attachments to existing eml file
本文介绍了将附件添加到现有的eml文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个现有的eml文件,其中包含正文和附件.
I have an existing eml file which contain among others body and attachments.
我只是想向该文件添加附件,而不是删除现有的onlt以添加附件.
I simply want to add attachments to this file, not erase existing onlt to add attachments.
我有这段代码可以创建eml:
I have this code to create eml:
public static void createMessage(String to, String from, String subject, String body, List<File> attachments) {
try {
Message message = new MimeMessage(Session.getInstance(System.getProperties()));
message.setFrom(new InternetAddress(from));
message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));
message.setSubject(subject);
// create the message part
MimeBodyPart content = new MimeBodyPart();
// fill message
content.setText(body);
Multipart multipart = new MimeMultipart();
multipart.addBodyPart(content);
// add attachments
for(File file : attachments) {
MimeBodyPart attachment = new MimeBodyPart();
DataSource source = new FileDataSource(file);
attachment.setDataHandler(new DataHandler(source));
attachment.setFileName(file.getName());
multipart.addBodyPart(attachment);
}
// integration
message.setContent(multipart);
// store file
message.writeTo(new FileOutputStream(new File("c:/mail.eml")));
} catch (MessagingException ex) {
Logger.getLogger(Mailkit.class.getName()).log(Level.SEVERE, null, ex);
} catch (IOException ex) {
Logger.getLogger(Mailkit.class.getName()).log(Level.SEVERE, null, ex);
}
}
但是我如何添加到现有而不是创建?
But how do i add to existing rather then create?
推荐答案
public static void addAttachment(Message msg, File attachment) throws Exception {
//Create the new body part and add the file
MimeBodyPart attachment = new MimeBodyPart();
DataSource source = new FileDataSource(file);
attachment.setDataHandler(new DataHandler(source));
attachment.setFileName(file.getName());
//Add the new body part to the e-mail
msg.getContent().addBodyPart(attachment);
}
在上述方法中,将使用附件创建一个新的正文部分,然后将该正文部分添加到已经存在的电子邮件的多部分中.
In the above method, a new bodypart is created with the attachment, and that bodypart is then added to the multipart of the e-mail which is already there.
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