import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.*;
import com.sun.mail.smtp.SMTPTransport;
import java.util.Base64;

public class EmailSender {

    public static void main(String[] args) {
        final String username = "cheung@emory.edu";
        final String password = "Beta01234.";
        final String recipientEmail = "cheung@emory.edu";
        final String filePath = "x"; 

        Properties props = new Properties();
        props.put("mail.transport.protocol", "smtp");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.host", "smtp.office365.com");
        props.put("mail.smtp.port", "587");
        props.put("mail.smtp.ssl.trust", "smtp.office365.com");
        props.put("mail.smtp.auth.mechanisms", "XOAUTH2");

        Session session = Session.getInstance(props, new Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password);
            }
        });

        try {
            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress(username));
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipientEmail));
            message.setSubject("Email with Attachment");

            MimeBodyPart textPart = new MimeBodyPart();
            textPart.setText("Please find the attached file.");

            MimeBodyPart attachmentPart = new MimeBodyPart();
            File file = new File(filePath);
            DataSource source = new FileDataSource(file);
            attachmentPart.setDataHandler(new DataHandler(source));
            attachmentPart.setFileName(file.getName());

            Multipart multipart = new MimeMultipart();
            multipart.addBodyPart(textPart);
            multipart.addBodyPart(attachmentPart);

            message.setContent(multipart);

            SMTPTransport transport = (SMTPTransport) session.getTransport("smtp");
             transport.connect("smtp.office365.com", username, password);
            transport.sendMessage(message, message.getAllRecipients());
            transport.close();

            System.out.println("Email sent successfully!");

        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}