使用Java開發的訊息提醒系統

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

public class MailReminder {
  public static void main(String[] args) {
    // 邮箱服务器配置
    String host = "smtp.example.com";
    String from = "yourname@example.com";
    String password = "yourpassword";
    
    // 收件人信息
    String to = "recipient@example.com";
    
    // 邮件内容
    String subject = "Message Reminder";
    String body = "Hello, this is a reminder message!";
    
    // 配置邮件服务器属性
    Properties properties = System.getProperties();
    properties.setProperty("mail.smtp.host", host);
    properties.setProperty("mail.smtp.auth", "true");
    
    // 创建会话和邮件对象
    Session session = Session.getDefaultInstance(properties, new Authenticator() {
      protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(from, password);
      }
    });
    MimeMessage message = new MimeMessage(session);
    
    try {
      // 设置邮件内容
      message.setFrom(new InternetAddress(from));
      message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
      message.setSubject(subject);
      message.setText(body);
      
      // 发送邮件
      Transport.send(message);
      System.out.println("Reminder email sent successfully!");
    } catch (MessagingException mex) {
      mex.printStackTrace();
    }
  }
}