App Engine創建併發送電子郵件音頻文件

Question

我需要從字節數組（由移動應用程序發佈）創建音頻文件，然後將其作爲附件發送給應用程序引擎（Java）。任何人有任何建議？謝謝你的幫助。

Answer 1

您可以發送音頻文件作爲某些音頻類型的電子郵件附件（請參閱list of supported formats）。 您可以使用這樣的代碼：

Properties props = new Properties(); 
Session session = Session.getDefaultInstance(props, null); 

try { 
    Message msg = new MimeMessage(session); 
    msg.setFrom(new InternetAddress("admin@example.com", "Example.com Admin")); 
    msg.addRecipient(Message.RecipientType.TO, new InternetAddress("user@example.com", "Mr. User")); 
    msg.setSubject("My subject"); 

    String htmlBody;  // ... 
    byte[] attachmentData; // your audio file as an array of bits 

    Multipart mp = new MimeMultipart(); 

    MimeBodyPart htmlPart = new MimeBodyPart(); 
    htmlPart.setContent(htmlBody, "text/html"); 
    mp.addBodyPart(htmlPart); 

    MimeBodyPart attachment = new MimeBodyPart(); 
    attachment.setFileName("myfile.mp3"); // we will use mp3 as an example 
    DataSource src = new ByteArrayDataSource(attachmentData, "audio/mpeg"); 
    attachment.setDataHandler(new DataHandler(src)); 
    mp.addBodyPart(attachment); 

    msg.setContent(mp); 
    Transport.send(msg); 

} catch (AddressException e) { 
    // ... 
} catch (MessagingException e) { 
    // ... 
}