Karthick Ramu Karthick Ramu - 4 months ago 14
Java Question

MessagingExceptionIOException while sending message in java?

I use the following code to send mail.Text message sending is working fine but Mail with attachment is not working it gives the Exception.How to solve this


javax.mail.MessagingException: IOException while sending message;
nested exception is:
javax.activation.UnsupportedDataTypeException: no object DCH for MIME type multipart/mixed;
boundary="----=_Part_0_10430987.1294298904906"
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:676)
at javax.mail.Transport.send0(Transport.java:189)
at javax.mail.Transport.send(Transport.java:118)
at Gmailer.GMailSender.sendMailAttach(GMailSender.java:114)
at SendMail.main(SendMail.java:22)
Caused by: javax.activation.UnsupportedDataTypeException: no object DCH for MIME type multipart/mixed;
boundary="----=_Part_0_10430987.1294298904906"
at javax.activation.ObjectDataContentHandler.writeTo(Unknown Source)
at javax.activation.DataHandler.writeTo(Unknown Source)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1403)
at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1745)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:636)
... 4 more


Mail with Attachment code :

public synchronized void sendMailAttach(String subject, String body,
String sender, String recipients) {
try {
MimeMessage message = new MimeMessage(session);

message.setSender(new InternetAddress(sender));
message.setSubject(subject);

// Create the message part
BodyPart messageBodyPart = new MimeBodyPart();

// Fill the message
messageBodyPart.setText("hi Demo");

Multipart multipart = new MimeMultipart();
multipart.addBodyPart(messageBodyPart);

// Part two is attachment
messageBodyPart = new MimeBodyPart();
String filename = "mail.txt";
DataSource source = new FileDataSource(filename);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(filename);
multipart.addBodyPart(messageBodyPart);

// Put parts in message
message.setContent(multipart);

if (recipients.indexOf(',') > 0)
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(recipients));
else
message.setRecipient(Message.RecipientType.TO,
new InternetAddress(recipients));
Transport.send(message);

}
catch (MessagingException e) {
System.out.println("MessagingException" + e.getMessage());
}
catch (Exception e) {
System.out.println("Mail Send Exception " + e.getMessage());
}
}


Text Mail send code:

public synchronized void sendMail(String subject, String body,
String sender, String recipients) throws Exception {
try {
MimeMessage message = new MimeMessage(session);
DataHandler handler = new DataHandler(new ByteArrayDataSource(
body.getBytes(), "text/plain"));
message.setSender(new InternetAddress(sender));
message.setSubject(subject);
message.setDataHandler(handler);
if (recipients.indexOf(',') > 0)
message.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(recipients));
else
message.setRecipient(Message.RecipientType.TO,
new InternetAddress(recipients));
Transport.send(message);
} catch (Exception e) {

}
}

Answer

Firstly, you could make your code a little more concise by using MimeBodyPart.attachFile() instead of wrangling the DataSource/DataHandler code yourself.

Secondly, try setting the Content-Type and Content-Disposition headers on your attachment part with appropriate values. (attachFile will set the Content-Disposition for you by default.) For instance,

messageBodyPart = new MimeBodyPart();
messageBodyPart.attachFile(new File("mail.txt"));
messageBodyPart.setHeader("Content-Type", "text/plain; charset=\"us-ascii\"; name=\"mail.txt\"");



EDIT:

After thinking a bit, this has to be something amiss with class loading. Please check this other SO thread to see if it remedies your situation. (General issue: Probably an extra activation.jar in your classpath; a few other possibilities also thought to cause it.)