HOW TO SEND EMAIL WITH ATTACHMENT IN JAVA APPLICATION

Simple application to send an email using java application

Example :

1. import javax.activation.DataHandler;
2. import javax.activation.FileDataSource;
3. import javax.mail.*;
4. import javax.mail.internet.InternetAddress;
5. import javax.mail.internet.MimeBodyPart;
6. import javax.mail.internet.MimeMessage;
7. import javax.mail.internet.MimeMultipart;
8. import java.util.Date;
9. import java.util.Properties;
10.  
11. public class EmailAttachmentDemo {
12.      public static void main(String[] args) {
13.         EmailAttachmentDemo demo = new EmailAttachmentDemo();
14.         demo.sendEmail();
15.     } 
16.     public void sendEmail() {
17.         String from = "email@example.com";
18.         String to = "email@example.com";
19.         String subject = "Important Message";
20.         String bodyText = "This is a important message with attachment";
21.         String filename = "jee-sample/src/main/resources/data.txt";
22.  
23.         Properties properties = new Properties();
24.         properties.put("mail.smtp.host", "smtp.example.com");
25.         properties.put("mail.smtp.port", "25");
26.         Session session = Session.getDefaultInstance(properties, null);
27.  
28.         try {
29.             MimeMessage message = new MimeMessage(session);
30.             message.setFrom(new InternetAddress(from));
31.             message.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
32.             message.setSubject(subject);
33.             message.setSentDate(new Date());
34.  
35.             // Set the email message text.
36.            
37.             MimeBodyPart messagePart = new MimeBodyPart();
38.             messagePart.setText(bodyText);
39.  
40.             // Set the email attachment file
41.             
42.             MimeBodyPart attachmentPart = new MimeBodyPart();
43.             FileDataSource fileDataSource = new FileDataSource(filename) {
44.                 @Override
45.                 public String getContentType() {
46.                     return "application/octet-stream";
47.                 }
48.             };
49.             attachmentPart.setDataHandler(new DataHandler(fileDataSource));
50.             attachmentPart.setFileName(fileDataSource.getName());
51.  
52.             Multipart multipart = new MimeMultipart();
53.             multipart.addBodyPart(messagePart);
54.             multipart.addBodyPart(attachmentPart);
55.  
56.             message.setContent(multipart);
57.  
58.             Transport.send(message);
59.         } catch (MessagingException e) {
60.             e.printStackTrace();
61.         }
62.     }
63.  }

Description:

Step 1 - 9 : All files are simply imported.

Step 11: Class is defined.
Step 12 -15: Here object of class is created and "sendEmail()" is called.
Step 18 - 22: Variables themselves describe their role.
Step 16: Here starts the "sendEmail()"