使用Commons-Email向Gmail发送电子邮件

import org.apache.commons.mail.DefaultAuthenticator;
import org.apache.commons.mail.Email;
import org.apache.commons.mail.SimpleEmail;

public class SendEmail {
    public static void main(String[] args) {
        Email email = new SimpleEmail();
        email.setHostName("smtp.gmail.com");
        email.setSmtpPort(587);
        email.setAuthenticator(new DefaultAuthenticator("username", "password"));
        email.setSSLOnConnect(false);
        email.setStartTLSEnabled(true);
        email.setFrom("sender@gmail.com");
        email.setSubject("Test email");
        email.setMsg("This is a test email.");
        email.addTo("recipient@gmail.com");
        try {
            email.send();
            System.out.println("Email sent successfully.");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}