如何在域驱动设计中将Intefaces与工厂模式一起使用？

public interface EmailSender {
    void sendEmail(String to, String subject, String body);
}

public class SMTPEmailSender implements EmailSender {
    private String smtpHost;
    private int smtpPort;

    public SMTPEmailSender(String smtpHost, int smtpPort) {
        this.smtpHost = smtpHost;
        this.smtpPort = smtpPort;
    }

    public void sendEmail(String to, String subject, String body) {
        // 实现发送电子邮件的逻辑
    }
}

public class EmailSenderFactory {
    public static EmailSender createEmailSender(String type) {
        if (type.equals("SMTP")) {
            return new SMTPEmailSender("smtp.example.com", 587);
        } else if (type.equals("AWS")) {
            return new AWSSESEmailSender();
        } else {
            throw new IllegalArgumentException("Invalid email sender type: " + type);
        }
    }
}

EmailSender emailSender = EmailSenderFactory.createEmailSender("SMTP");
emailSender.sendEmail("user@example.com", "Hello", "This is a test email.");