Javamail mehrere Dateien anhängen

Question

Der folgende Code sendet Mail und Anhänge über Gmail SMTP-Server mit Javamail API.

public void doSendGmail(){ 
    from = txtFrom.getText(); 
    password= new String(txtPassword.getPassword()); 
    to = txtTo.getText(); 
    cc = txtCC.getText(); 
    bcc = txtBCC.getText(); 
    subject = txtSubject.getText(); 
    message_body = jtaMessage.getText(); 

    Properties props = new Properties(); 
    props.put("mail.smtp.starttls.enable", "true"); 
    props.put("mail.smtp.auth", "true"); 
    props.put("mail.smtp.host", "smtp.gmail.com"); 
    props.put("mail.smtp.port", "587"); 

    Session session = Session.getInstance(props,null); 

    try { 
     //message definition 
     Message message = new MimeMessage(session); 
     message.setFrom(new InternetAddress(from)); 
     message.setRecipients(Message.RecipientType.TO,InternetAddress.parse(to)); 
     if(!cc.equals("")){ 
      message.setRecipients(Message.RecipientType.CC, InternetAddress.parse(cc)); 
     } 
     if(!bcc.equals("")){ 
      message.setRecipients(Message.RecipientType.BCC, InternetAddress.parse(bcc)); 
     } 
     message.setSubject(subject); 
     if(!filename.equals("")){// if a file has been attached... 
      BodyPart messageBodyPart = new MimeBodyPart(); 
      messageBodyPart.setText(message_body);// actual message 
      Multipart multipart = new MimeMultipart();// create multipart message 

      // add the text message to the multipart 
      multipart.addBodyPart(messageBodyPart); 

      // attachment part 
      messageBodyPart = new MimeBodyPart(); 
      String attachment = fileAbsolutePath; 
      DataSource source = new FileDataSource(attachment); 
      messageBodyPart.setDataHandler(new DataHandler(source)); 
      messageBodyPart.setFileName(filename); 
      multipart.addBodyPart(messageBodyPart);//add the attachment to the multipart message 
      // combine text and attachment 
      message.setContent(multipart); 
      // send the complete message 
      Transport.send(message, from, password); 
     } 
     else{// if no file has been attached 
      message.setText(message_body); 
      Transport.send(message, from, password); 
     } 

     JOptionPane.showMessageDialog(this, "Message Sent!","Sent",JOptionPane.INFORMATION_MESSAGE); 

    } catch (Exception e) { 
     JOptionPane.showMessageDialog(this, e.toString()); 
    } 
} 

Dieser Code kann nur jeweils eine Datei anhängen und senden. Wie können Sie mehrere Dateien anhängen und als eine E-Mail versenden?

Die Datei wird angebracht, um eine JFileChooser verwendet, wie unten gezeigt:

public void doAttachFile(){ 
    try { 
     JFileChooser chooser = new JFileChooser(); 
     chooser.showOpenDialog(null); 
     File file = chooser.getSelectedFile(); 
     filename = file.getName();// get name of selected file 
     lblFileName.setText(filename);// display name of selected file 
     fileAbsolutePath= file.getAbsolutePath(); 
     System.out.println("File name: "+filename+"\n"+"Absolute path: "+fileAbsolutePath); 

    } catch (Exception e) { 
     JOptionPane.showMessageDialog(this, "No file was attached"); 
    } 
} 

Answer 1

Verwenden a "für" Schleife um den Befestigungsteil.

Answer 2

Um mehrere Dateien zu senden, können Sie dies implementieren.

// Adds multiple attachments  
Multipart multipart = new MimeMultipart(); 

String[] attachFiles = new String[amountFiles]; 
attachFiles[0] = "path.pdf"; 
attachFiles[1] = "path.txt"; 

if(attachFiles != null && attachFiles.length > 0){ 
    for (String filePath : attachFiles) { 
     MimeBodyPart attachPart = new MimeBodyPart(); 
     try { 
      attachPart.attachFile(filePath); 
     } catch (IOException ex) { 
      ex.printStackTrace(); 
     } 
     multipart.addBodyPart(attachPart); 
    } 
} 

message.setContent(multipart); 

Answer 3

Sie können so viele Dateien anhängen, wie Sie diese Zeile nur wiederholen wollen

multipart.addBodyPart(messageBodyPart); 

für jede Datei