Javamail - CSVPrinter :发送带有csv附件的电子邮件

import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import org.apache.commons.csv.*;

public class EmailSender {
    public static void main(String[] args) {
        // 邮件服务器配置
        String host = "smtp.example.com";
        String username = "your_username";
        String password = "your_password";

        // 发件人和收件人信息
        String fromEmail = "sender@example.com";
        String toEmail = "recipient@example.com";

        // 创建邮件会话
        Properties props = new Properties();
        props.put("mail.smtp.host", host);
        props.put("mail.smtp.auth", "true");
        Session session = Session.getInstance(props, new Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password);
            }
        });

        try {
            // 创建邮件消息
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(fromEmail));
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(toEmail));
            message.setSubject("带有CSV附件的邮件");

            // 创建邮件正文
            MimeBodyPart messageBodyPart = new MimeBodyPart();
            messageBodyPart.setText("这是一封带有CSV附件的邮件。");

            // 创建CSV附件
            MimeBodyPart attachmentBodyPart = new MimeBodyPart();
            CSVPrinter csvPrinter = new CSVPrinter(attachmentBodyPart.getOutputStream(), CSVFormat.DEFAULT);
            csvPrinter.printRecord("列1", "列2", "列3");
            csvPrinter.printRecord("数据1", "数据2", "数据3");
            csvPrinter.flush();
            csvPrinter.close();
            attachmentBodyPart.setFileName("attachment.csv");

            // 将正文和附件添加到邮件中
            Multipart multipart = new MimeMultipart();
            multipart.addBodyPart(messageBodyPart);
            multipart.addBodyPart(attachmentBodyPart);
            message.setContent(multipart);

            // 发送邮件
            Transport.send(message);
            System.out.println("邮件发送成功！");
        } catch (MessagingException e) {
            e.printStackTrace();
        }
    }
}