Question

I use this code to send mail using java. In here i attach a pdf file to mail. if file not found i want to throw and file not found exception.How to do it?

    try{
    Message message = new MimeMessage(session);
    message.setFrom(new InternetAddress(from));
    message.addRecipient(Message.RecipientType.TO, new InternetAddress(receiver));
    message.setSubject(subject);
    // Create the message part
    BodyPart messageBodyPart = new MimeBodyPart();
    // Fill the message
    messageBodyPart.setText("hai");
    Multipart multipart = new MimeMultipart();
    multipart.addBodyPart(messageBodyPart);
    //Attachement
    messageBodyPart = new MimeBodyPart();
    String filename = "file";
        DataSource source = new FileDataSource(filename);
        messageBodyPart.setDataHandler(new DataHandler(source));
        messageBodyPart.setFileName(source.getName());
        multipart.addBodyPart(messageBodyPart);
    }
    message.setContent(multipart);
    Transport transport = session.getTransport("smtp");
    try{
        transport.connect(host,from,password);
    } catch (AuthenticationFailedException err){
        String errMsg = "Authentication fails when sending mail. Sent failed to " + receiver;
        log.error(errMsg,err);
        throw new AuthenticationFailedException(errMsg + err.getMessage());
    }
    transport.send(message);
} catch (MessagingException re) {
    String localizedError = "Unexpected error occurred at Email client. Sent failed to:" + receiver + ". ";
    log.error(localizedError + re.getLocalizedMessage(), re);
    throw new MessagingException(localizedError + re.getLocalizedMessage(), re);
}

This is the code i want to add file not found exception

Answer 1

I would have thought that Either FileDataSource or DataHandler would do that, but if not, just add:

new FileInputStream(filename).close();

before passing the filename argument to FileDataSource.
which will throw that exception for you.