The JavaMail API provides a platform-independent and protocol-independent framework to build mail and messaging applications. The JavaMail API is available as an optional package for use with Java SE platform and is also included in the Java EE platform. The JavaMail 1.4.5 release contains several bug fixes and enhancements.
Sometime back I’ve written a Tutorial on Send an email using Gmail SMTP (TLS Authentication), but without Image Attachment. Below Java Tutorial will help you send a Large Image with an email as an attachment.
Sometimes we want to attach an image in the email and then use it in the email body itself. You must have seen so many emails that have image attachments and are also used in the email message. The trick is to attach the image file like any other attachment and then set the Content-ID header for image file and then use the same content id in the email message body with <img src='cid:image_id'>.
Here is a simple Java Program:
package com.crunchify.tutorials;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
/**
* @author Crunchify.com
*
*/
public class CrunchifyJavaMailWithImageAttachment {
static Properties mailServerProperties;
static Session getMailSession;
static MimeMessage msg;
public static void main(String args[]) throws AddressException, MessagingException {
System.out.println("\n1st ===> setup Mail Server Properties..");
final String sourceEmail = "<Your Gmail Email ID"; // requires valid Gmail id
final String password = "Your Gmail Password"; // correct password for Gmail id
final String toEmail = "noreply@crunchify.com"; // any destination email id
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.port", "587");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
System.out
.println("\n2nd ===> create Authenticator object to pass in Session.getInstance argument..");
Authenticator authentication = new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(sourceEmail, password);
}
};
Session session = Session.getInstance(props, authentication);
generateAndSendEmail(
session,
toEmail,
"Crunchify's JavaMail API example with Image Attachment",
"Greetings, <br><br>Test email by Crunchify.com JavaMail API example. Please find here attached Image."
+ "<br><br> Regards, <br>Crunchify Admin");
}
public static void generateAndSendEmail(Session session, String toEmail, String subject,
String body) {
try {
System.out.println("\n3rd ===> generateAndSendEmail() starts..");
MimeMessage crunchifyMessage = new MimeMessage(session);
crunchifyMessage.addHeader("Content-type", "text/HTML; charset=UTF-8");
crunchifyMessage.addHeader("format", "flowed");
crunchifyMessage.addHeader("Content-Transfer-Encoding", "8bit");
crunchifyMessage.setFrom(new InternetAddress("noreply@crunchify.com",
"NoReply-Crunchify"));
crunchifyMessage.setReplyTo(InternetAddress.parse("noreply@crunchify.com", false));
crunchifyMessage.setSubject(subject, "UTF-8");
crunchifyMessage.setSentDate(new Date());
crunchifyMessage.setRecipients(Message.RecipientType.TO,
InternetAddress.parse(toEmail, false));
// Create the message body part
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setContent(body, "text/html");
// Create a multipart message for attachment
Multipart multipart = new MimeMultipart();
// Set text message part
multipart.addBodyPart(messageBodyPart);
messageBodyPart = new MimeBodyPart();
// Valid file location
String filename = "/Users/<username>/Desktop/JavaMailAPIwithImage-CrunchifyExample.png";
DataSource source = new FileDataSource(filename);
messageBodyPart.setDataHandler(new DataHandler(source));
messageBodyPart.setFileName(filename);
// Trick is to add the content-id header here
messageBodyPart.setHeader("Content-ID", "image_id");
multipart.addBodyPart(messageBodyPart);
System.out.println("\n4th ===> third part for displaying image in the email body..");
messageBodyPart = new MimeBodyPart();
messageBodyPart.setContent("<br><h3>Find below attached image</h3>"
+ "<img src='cid:image_id'>", "text/html");
multipart.addBodyPart(messageBodyPart);
crunchifyMessage.setContent(multipart);
System.out.println("\n5th ===> Finally Send message..");
// Finally Send message
Transport.send(crunchifyMessage);
System.out
.println("\n6th ===> Email Sent Successfully With Image Attachment. Check your email now..");
System.out.println("\n7th ===> generateAndSendEmail() ends..");
} catch (MessagingException e) {
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
}
Output:
1st ===> setup Mail Server Properties.. 2nd ===> create Authenticator object to pass in Session.getInstance argument.. 3rd ===> generateAndSendEmail() starts.. 4th ===> third part for displaying image in the email body.. 5th ===> Finally Send message.. 6th ===> Email Sent Successfully With Image Attachment. Check your email now.. 7th ===> generateAndSendEmail() ends..
Example Screenshot:
