熟悉Java开发中常见的邮件发送工具类

import javax.mail.*;
import javax.mail.internet.*;

public class EmailSender {
    public static void main(String[] args) {
        String to = "recipient@example.com";
        String from = "sender@example.com";
        String host = "smtp.example.com";

        Properties properties = System.getProperties();
        properties.setProperty("mail.smtp.host", host);

        Session session = Session.getDefaultInstance(properties);

        try {
            MimeMessage message = new MimeMessage(session);

            message.setFrom(new InternetAddress(from));

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

            message.setSubject("Hello");

            message.setText("Hello, this is a test email!");

            Transport.send(message);
            System.out.println("Message sent successfully!");
        } catch (MessagingException mex) {
            mex.printStackTrace();
        }
    }
}

import org.apache.commons.mail.*;

public class EmailSender {
    public static void main(String[] args) {
        String to = "recipient@example.com";
        String from = "sender@example.com";
        String host = "smtp.example.com";

        Email email = new SimpleEmail();

        email.setHostName(host);
        email.setFrom(from);
        email.addTo(to);
        email.setSubject("Hello");
        email.setMsg("Hello, this is a test email!");

        try {
            email.send();
            System.out.println("Email sent successfully!");
        } catch (EmailException e) {
            e.printStackTrace();
        }
    }
}