SMTP Java

Smtp.java

/*Gradle:
	implementation 'com.github.bbottema:simple-java-mail:5.0.1'
	aktuellste Version ist mittlerweile: group: 'org.simplejavamail', name: 'simple-java-mail', version: '6.6.1'
	Webseite: https://www.simplejavamail.org/features.html */

import java.time.LocalDateTime;

import org.pmw.tinylog.Logger;
import org.simplejavamail.email.EmailBuilder;
import org.simplejavamail.mailer.Mailer;
import org.simplejavamail.mailer.MailerBuilder;

public class MailSender {
	private final Mailer mailer;
	public String fromName;
	protected String fromMailAddress;
	protected String forceTo;
	
	/** Test */
	public static void main(String[] args) {
    // c is Config object
		System.out.println("send mail to " + c.get("mail.test.to") + " using SMTP server " + c.get("mail.smtp-server"));
		new MailSender().sendMail(c.get("mail.test.to"),
				"Testmail",
				"Dies ist ein Test.\n Umlaute: äöüÄÖÜß.\n\n" + LocalDateTime.now().toString() + "\nhttp://google.de\nend");
		System.out.println("done");
	}
	
	/**
	 * Initialize mailer using the app config file.
	 */
	public MailSender() {
    // c is Config object
		Integer port = 25;
		mailer = MailerBuilder
				.withSMTPServer(c.get("mail.smtp-server"), port)
				.withSMTPServerUsername(c.get("mail.username"))
				.withSMTPServerPassword(c.get("mail.password"))
				.buildMailer();
		fromName = c.get("mail.from.name");
		fromMailAddress = c.get("mail.from.mail-address");
		forceTo = c.get("mail.to", "");
	}
	
	/**
	 * Sends mail!
	 * 
	 * @param to recipient mail address
	 * @param subject
	 * @param plainText can contain links starting with http://
	 */
	public void sendMail(String to, String subject, String plainText) {
		String sendTo = forceTo.isEmpty() ? to : forceTo;
		mailer.sendMail(EmailBuilder.startingBlank()
				.from(fromName, fromMailAddress)
				.to(sendTo)
				.withSubject(subject)
				.withPlainText(plainText)
				.buildEmail());
	}
}