如何使用JavaMail将多个文件附加到电子邮件？

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

public class EmailAttachmentExample {
    public static void main(String[] args) {
        // 邮件会话配置
        Properties properties = new Properties();
        properties.put("mail.smtp.host", "smtp.exmail.qq.com");
        properties.put("mail.smtp.port", "465");
        properties.put("mail.smtp.auth", "true");
        properties.put("mail.smtp.ssl.enable", "true");

        // 创建邮件会话
        Session session = Session.getInstance(properties, new Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("your-email@example.com", "your-password");
            }
        });

        try {
            // 创建邮件消息
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress("your-email@example.com"));
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("recipient@example.com"));
            message.setSubject("Email with attachments");

            // 创建附件容器
            MimeMultipart multipart = new MimeMultipart();

            // 创建文件附件
            MimeBodyPart attachment1 = new MimeBodyPart();
            attachment1.attachFile("path/to/file1.txt");

            MimeBodyPart attachment2 = new MimeBodyPart();
            attachment2.attachFile("path/to/file2.txt");

            // 将文件附件添加到附件容器
            multipart.addBodyPart(attachment1);
            multipart.addBodyPart(attachment2);

            // 将附件容器设置为邮件消息的内容
            message.setContent(multipart);

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

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