Sending a PDF Attachment via EMail

[Mahesh Trikannad]

I want to send a PDF Attachment using Java mail.

I have the PDF as a byte array. I dont want to save it to a file, but want to create a attachment straight from the byte array.

How can I do that, using MimeMultiPart and MimeBodyPart

Mahesh

[Piotr Maj]

yes, this is possible. All you need is to write a custom datasource. Look at the code below:

package examples;
 
import java.io.*;
import javax.activation.*;
import javax.mail.Session;
import javax.mail.internet.*;
 
public class ByteArrayTest {
 
    public static void main(String[] args) throws Exception {
        final byte[] attachment = "Attachment".getBytes();
        MimeMessage message = new MimeMessage((Session)null);
        MimeMultipart multipart = new MimeMultipart();
        MimeBodyPart part = new MimeBodyPart();
        part.setDataHandler(
           new DataHandler(
                   new DataSource() {
 
            public String getContentType() {
                return "application/pdf";
            }
 
            public InputStream getInputStream() throws IOException {
                return new ByteArrayInputStream(attachment);
            }
 
            public String getName() {
                return "myfile.pdf";
            }
 
            public OutputStream getOutputStream() throws IOException {
                return null;
            }}));
 
        multipart.addBodyPart(part);
        message.setContent(multipart);
        message.writeTo(System.out);
    }
}

I hope this will be helpful.

[Mahesh Trikannad]

Thanks Piotr,

I found another solution, where MimeBodyPart is extended , to provide functionality to set the content to a bytearray .

Guess there are different ways to do it, but none very obvious.

Mahesh