在Java中向电子邮件发送消息的程序

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

public class EmailSender {
    public static void main(String[] args) {
        // 邮件发送者的邮箱账号和密码
        String senderEmail = "your_email@example.com";
        String senderPassword = "your_email_password";

        // 邮件接收者的邮箱地址
        String recipientEmail = "recipient_email@example.com";

        // 邮件服务器的主机名和端口号
        String host = "smtp.example.com";
        int port = 587;

        // 创建Properties对象，设置邮件服务器的配置信息
        Properties props = new Properties();
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.port", port);
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.starttls.enable", "true");

        // 创建Session对象，用于与邮件服务器进行通信
        Session session = Session.getInstance(props, new Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(senderEmail, senderPassword);
            }
        });

        try {
            // 创建MimeMessage对象，设置邮件内容
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(senderEmail));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(recipientEmail));
            message.setSubject("JavaMail API Test");
            message.setText("This is a test email sent from JavaMail API.");

            // 发送邮件
            Transport.send(message);

            System.out.println("Email sent successfully.");
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}