JavaMailUtil.java
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McMaster. Software Engineer with a keen interest in blockchain and web3.
package util;
import java.util.Properties;
import jakarta.mail.Authenticator;
import jakarta.mail.Message;
import jakarta.mail.MessagingException;
import jakarta.mail.PasswordAuthentication;
import jakarta.mail.Session;
import jakarta.mail.Transport;
import jakarta.mail.internet.InternetAddress;
import jakarta.mail.internet.MimeMessage;
public class JavaMailUtil {
// Verify the credentials of the email and use SMTP to send it
// Set the properties to TTLS, authentication to true and GMail configurations
public static void sendEmail(String msg, String emailAddress, String password) throws MessagingException {
Properties properties = new Properties();
properties.put("mail.smtp.auth", "true");
properties.put("mail.smtp.starttls.enable", "true");
properties.put("mail.smtp.host", "smtp.gmail.com"); // Configurations set to GMail by default accessing port 587
properties.put("mail.smtp.port", "587");
Session session = Session.getInstance(properties, new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(emailAddress, password); // Authenticate credentials here
}
});
Message message = prepareMessage(session, emailAddress, password, msg); // Specify all the information required for messaging
Transport.send(message);
System.out.println("Message sent successfully");
}
// Prepare the actual email message prior to sending
public static Message prepareMessage(Session session, String emailAddress, String password, String msg) {
try {
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(emailAddress));
message.setRecipient(Message.RecipientType.TO, new InternetAddress(emailAddress)); // Recipient is the same as sender
message.setSubject("BTC, ETH, SOL Cryptocurrency Prices");
message.setText(msg); // Populate the message
return message;
}
catch (Exception e) {
System.out.println(e.getMessage());
}
return null;
}
}