Send email with attachment

Ilias TsagklisNovember 11th, 2012Last Updated: May 8th, 2013

0 211 1 minute read

With this tutorial we are going to see how to send an email with an attachment in a Java Application. This is particularly useful when you want to handle email activities inside your application.

Basically, all you have to do to send email with attachment is:

Set SMTP properties using a Properties object.
Use properties.put("mail.smtp.host", "smtp.javacodegeeks.com") to set the smtp host.
Use properties.put("mail.smtp.port", "25") to set the smtp port.
Create a new Session with the above properties using Session.getDefaultInstance(properties, null).
Create a new MimeMessage object with the above session.
Use setFrom(new InternetAddress(from)) to set the sender address.
Use setRecipient(Message.RecipientType.TO, new InternetAddress(to)) to set the recipient.
Use setSubject to set the subject of the message.
Create a new MimeBodyPart and use setTex to set the body of the email.
Create a new MimeBodyPart for the attachement.
Create a new FileDataSource.
Use setDataHandler(new DataHandler(fileDataSource)) to set the data handler for the attachment.
Add all parts of the email to Multipart object.

Let’s see the code:

package com.javacodegeeks.snippets.enterprise;

import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import java.util.Date;
import java.util.Properties;

public class EmailAttachmentExample {

    public static void main(String[] args) {

  EmailAttachmentExample example = new EmailAttachmentDemo();

  example.sendEmail();

    }

    public void sendEmail() {

  // Strings that contain from, to, subject, body and file path to the attachment

  String from = "sender@javacodegeeks.com";

  String to = "receiver@javacodegeeks.com";

  String subject = "Test mail";

  String body = "Test body";

  String filename = "C:\sample.txt";

  // Set smtp properties

  Properties properties = new Properties();

  properties.put("mail.smtp.host", "smtp.javacodegeeks.com");

  properties.put("mail.smtp.port", "25");

  Session session = Session.getDefaultInstance(properties, null);

  try {

MimeMessage message = new MimeMessage(session);

message.setFrom(new InternetAddress(from));

message.setRecipient(Message.RecipientType.TO, new InternetAddress(to));

message.setSubject(subject);

message.setSentDate(new Date());

// Set the email body

MimeBodyPart messagePart = new MimeBodyPart();

messagePart.setText(body);

// Set the email attachment file

MimeBodyPart attachmentPart = new MimeBodyPart();

FileDataSource fileDataSource = new FileDataSource(filename) {

    @Override

    public String getContentType() {

  return "application/octet-stream";

    }

};

attachmentPart.setDataHandler(new DataHandler(fileDataSource));

attachmentPart.setFileName(fileDataSource.getName());

// Add all parts of the email to Multipart object

Multipart multipart = new MimeMultipart();

multipart.addBodyPart(messagePart);

multipart.addBodyPart(attachmentPart);

message.setContent(multipart);

// Send email

Transport.send(message);

  } catch (MessagingException e) {

e.printStackTrace();

  }
    }
}

This was an example on how to send email with attachment.