How to achieve mailing feature in java application

To achieve a mailing feature in a Java application, you can use the JavaMail API, which is a part of the Java Standard Edition (SE) platform. Here's a step-by-step guide to help you get started:

Prerequisites:

Java Development Kit (JDK) 8 or later
JavaMail API (jar file) - you can download it from the official Oracle website or use a Maven dependency

Step 1: Add the JavaMail API to your project

If you're using Maven, add the following dependency to your pom.xml file:

<dependency>
    <groupId>com.sun.mail</groupId>
    <artifactId>javax.mail</artifactId>
    <version>1.6.2</version>
</dependency>

If you're not using Maven, download the JavaMail API jar file and add it to your project's classpath.

Step 2: Create a JavaMail session

Create a Session object to configure the mail settings:

import javax.mail.Session;
import javax.mail.PasswordAuthentication;

public class MailConfig {
    public static Session getSession() {
        Properties props = new Properties();
        props.put("mail.smtp.host", "your-smtp-host");
        props.put("mail.smtp.port", "your-smtp-port");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.starttls.required", "true");
        props.put("mail.smtp.ssl.trust", "*");

        Session session = Session.getInstance(props, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("your-email-username", "your-email-password");
            }
        });
        return session;
    }
}

Replace the placeholders with your actual SMTP host, port, username, and password.

Step 3: Create a MimeMessage object

Create a MimeMessage object to compose the email:

import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class MailSender {
    public static void sendMail(String toAddress, String subject, String body) {
        Session session = MailConfig.getSession();
        MimeMessage message = new MimeMessage(session);

        try {
            message.setFrom(new InternetAddress("your-email-username"));
            message.setRecipient(Message.RecipientType.TO, new InternetAddress(toAddress));
            message.setSubject(subject);
            message.setText(body);

            Transport.send(message);
        } catch (MessagingException e) {
            // handle exception
        }
    }
}

Step 4: Send the email

Call the sendMail method to send the email:

public class Main {
    public static void main(String[] args) {
        MailSender.sendMail("[email protected]", "Test Email", "This is a test email.");
    }
}

Additional tips:

Make sure to replace the placeholders with your actual SMTP host, port, username, and password.
You can also attach files to the email by using the MimeBodyPart class.
You can customize the email content, such as adding HTML content or using a template engine.
You can also use a mail client library like Apache Commons Email or Java Email API to simplify the process.

That's it! With these steps, you should be able to send emails from your Java application using the JavaMail API.

Mail Knowledge

How to achieve mailing feature in java application