Anexar arquivo em email usando javax.mail.*

public void send(String to, String cc, String bcc, String from, String subject, String text) throws Exception {

MailMessage msg = new MailMessage (to,cc,bcc,from,subject,text);

this.send(msg);

return;

}

public void send(MailMessage msg) throws Exception {

try {

Properties mailProps = new Properties();

mailProps.put(“mail.smtp.host”, SMTP_HOST_NAME);

SimpleAuth auth = null; 
		auth = new SimpleAuth (usuario,senha); 

		mailProps.put("mail.smtp.auth", "true"); 
		mailProps.put("mail.user",usuario); 
		mailProps.put("mail.from",msg.getFrom()); 
		mailProps.put("mail.to", msg.getTo()); 

		mailProps.put("mail.smtp.host", SMTP_HOST_NAME); 
		mailProps.put("mail.smtp.auth", "true"); 
		mailProps.put("mail.debug", "true"); 
		
		mailProps.put("mail.smtp.port", SMTP_PORT); 
		mailProps.put("mail.smtp.socketFactory.port", SMTP_PORT); 
		mailProps.put("mail.smtp.socketFactory.class", SSL_FACTORY); 
		mailProps.put("mail.smtp.socketFactory.fallback", "false"); 


		Session mailSession = Session.getDefaultInstance(mailProps,auth); 

		mailSession.setDebug(true); 

		Message email = new MimeMessage (mailSession); 
		email.setRecipients( Message.RecipientType.TO, InternetAddress.parse(msg.getTo()) ); 
		if (!msg.getCc().trim().equals("")) { 
			email.setRecipients( Message.RecipientType.CC, InternetAddress.parse(msg.getCc()) ); 
		} 
		if (!msg.getBcc().trim().equals("")) { 
			email.setRecipients( Message.RecipientType.BCC, InternetAddress.parse(msg.getBcc()) ); 
		} 
		email.setFrom( new InternetAddress(msg.getFrom())); 
		email.setSubject(msg.getSubject()); 
		email.setContent( msg.getText(), "text/plain" ); 
		
		Transport tr = mailSession.getTransport("smtp"); 
		tr.connect(SMTP_HOST_NAME, usuario, senha); 
		email.saveChanges(); // don't forget this 
		tr.sendMessage(email, email.getAllRecipients()); 
		tr.close(); 
		
	} catch (Exception e) { 
		System.out.println(" [E] ERROR: "+e); 
		e.printStackTrace(System.out); 
		throw e; 
	} 
	System.out.println(" [#] Email successfully sent"); 
	return; 
}