import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import java.io.File;
import java.util.Properties;

public class SendMail extends Thread {

	static Properties mailServerProperties;
	static Session getMailSession;
	static MimeMessage generateMailMessage;

	public SendMail(){
		super();
	}

	public void run(){
		try {
			// Step1
			System.out.println("\n 1st ===> setup Mail Server Properties..");
			mailServerProperties = System.getProperties();
			mailServerProperties.put("mail.smtp.port", "587");
			mailServerProperties.put("mail.smtp.auth", "true");
			mailServerProperties.put("mail.smtp.starttls.enable", "true");
			System.out.println("Mail Server Properties have been setup successfully..");

			// Step2
			System.out.println("\n\n 2nd ===> get Mail Session..");
			getMailSession = Session.getInstance(mailServerProperties, new javax.mail.Authenticator() {
				protected PasswordAuthentication getPasswordAuthentication() {
					return new PasswordAuthentication("mash.savenko@gmail.com", "ykmjmgnogaqqbnqa");
				}
			});
			generateMailMessage = new MimeMessage(getMailSession);
			generateMailMessage.addRecipient(Message.RecipientType.TO, new InternetAddress("msav.post@gmail.com"));
			//generateMailMessage.addRecipient(Message.RecipientType.CC, new InternetAddress("test2@crunchify.com"));
			generateMailMessage.setSubject("Some files");
			String emailBody = "Body";
			generateMailMessage.setText(emailBody);

			MimeBodyPart messageBodyPart = new MimeBodyPart();

			Multipart multipart = new MimeMultipart();

			File folder = new File ("toSend");
			for (final File fileEntry : folder.listFiles()) {
				if (!fileEntry.isDirectory()) {
					String file = "toSend/" + fileEntry.getName();
					DataSource source = new FileDataSource(file);
					messageBodyPart.setDataHandler(new DataHandler(source));
					messageBodyPart.setFileName(file);
					multipart.addBodyPart(messageBodyPart);
				} else {
					System.out.println("/toSend folder contain another folders" );
				}
			}

			generateMailMessage.setContent(multipart);
			System.out.println("Mail Session has been created successfully...");

			// Step3
			System.out.println("\n\n 3rd ===> Get Session and Send mail");
			Transport transport = getMailSession.getTransport("smtp");

			// Enter your correct gmail UserID and Password
			// if you have 2FA enabled then provide App Specific Password
			transport.connect("smtp.gmail.com", "mash.savenko@gmail.com", "ykmjmgnogaqqbnqa");
			transport.sendMessage(generateMailMessage, generateMailMessage.getAllRecipients());
			transport.close();

			System.out.println("Done!");

		} catch (MessagingException e) {
			throw new RuntimeException(e);
		}
	}
}