Java 電子メール送信ライブラリを比較して推奨する: 適切な電子メール送信ツールを見つけてください

import javax.mail.*;
import javax.mail.internet.*;
import java.util.Properties;

public class SendEmail {

    public static void main(String[] args) {

        String to = "recipient@example.com";
        String from = "sender@example.com";
        String host = "smtp.example.com";
        String username = "username";
        String password = "password";

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

        Session session = Session.getInstance(properties,
                new javax.mail.Authenticator() {
                    protected PasswordAuthentication getPasswordAuthentication() {
                        return new PasswordAuthentication(username, password);
                    }
                });

        try {
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(from));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
            message.setSubject("JavaMail API Test");
            message.setText("Hey, this is a test email using JavaMail API!");

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

import org.apache.commons.mail.*;

public class SendEmail {

    public static void main(String[] args) {

        String to = "recipient@example.com";
        String from = "sender@example.com";
        String host = "smtp.example.com";
        String username = "username";
        String password = "password";

        Email email = new SimpleEmail();
        email.setHostName(host);
        email.setSmtpPort(465);
        email.setAuthenticator(new DefaultAuthenticator(username, password));
        email.setSSLOnConnect(true);

        try {
            email.setFrom(from);
            email.setSubject("Apache Commons Email Test");
            email.setMsg("Hey, this is a test email using Apache Commons Email!");
            email.addTo(to);
            email.send();
            System.out.println("Email sent successfully!");
        } catch (EmailException e) {
            e.printStackTrace();
        }
    }
}

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.mail.MailSender;
import org.springframework.mail.SimpleMailMessage;

public class SendEmail {

    public static void main(String[] args) {

        ApplicationContext context = new ClassPathXmlApplicationContext("spring-email.xml");
        MailSender mailSender = (MailSender) context.getBean("mailSender");
        SimpleMailMessage message = new SimpleMailMessage();

        message.setTo("recipient@example.com");
        message.setFrom("sender@example.com");
        message.setSubject("Spring Email Test");
        message.setText("Hey, this is a test email using Spring Framework!");

        mailSender.send(message);
        System.out.println("Email sent successfully!");
    }
}