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我在使用java郵件（1.4.6）在java中通過電子郵件發送附件時遇到了問題。看起來，當我附加任何類型的文檔併發送它時，收件人將以純文本格式在文本中獲取文件。而不是，你猜對了，發送整個文件就像你期望的那樣，並且身體不會受到干擾。在主體中以純文本形式發送的java電子郵件附件
代碼
try
{
// Create a message
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(username));
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(Compose.to));
message.setSubject(Compose.subject);
//message.setText(Compose.body);
//If there are no CC's then skip it. This if seemed to decrease send time.
if(Compose.cc != null)
{
message.setRecipients(Message.RecipientType.CC, InternetAddress.parse(Compose.cc));
message.saveChanges();
}
else
message.saveChanges();
/*
* For adding the attached file to the email. This time the if
* statement is used to stop the email attachment process if there
* is none. Other wise due to the way I've set it up it'll try to
* send file path and file name as null, and we fail an otherwise valid email.
*/
if(Compose.filename != null)
{
String file = Compose.filepath;
String fileName = Compose.filename;
Multipart multipart = new MimeMultipart();
BodyPart messageBodyPart = new MimeBodyPart();
DataSource source = new FileDataSource(file);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(fileName);
multipart.addBodyPart(messageBodyPart);
BodyPart messageBodyPart2 = new MimeBodyPart();
messageBodyPart2.setText(Compose.body);
multipart.addBodyPart(messageBodyPart2);
message.setContent(multipart);
}
else
{
message.setText(Compose.body);
message.saveChanges();
}
//Send the message by javax.mail.Transport .
Transport tr = session.getTransport("smtp"); // Get Transport object from session
tr.connect(smtphost, username, password); // We need to connect
tr.sendMessage(message, message.getAllRecipients()); // Send message
//Notify the user everything functioned fine.
JOptionPane.showMessageDialog(null, "Your mail has been sent.");
}
在這個我記得是如何FileDataSource()是一個重載錄取口供的字符串或文件類型作爲參數思考，試圖既我得到了相同的結果，但我會嘗試多用現在是文件類型。
編輯：經過更多的測試後，我注意到有時文件不會出現在發送時身上的任何東西。