用JAVA发送含有附件的邮件

1、用JAVA发送含有附件的邮件

public void sendKREmailAndFile(String[] toEmail, String mailSubject, String mailContent,List<File> fileList) throws MessagingException {
        Properties prop = new Properties();
        prop.put("mail.smtp.auth", "true");
        prop.put("mail.smtp.host", host);
        prop.put("mail.smtp.port", port);
        prop.put("mail.debug", "true");
        prop.put("mail.smtp.starttls.enable", "true");
        Session session = Session.getInstance(prop, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(userName, password);
            }
        });
 
        MimeMessage message = new MimeMessage(session);
        message.setSubject(mailSubject);
        message.setFrom(new InternetAddress(senderEmail));
        InternetAddress[] toAddress = new InternetAddress[toEmail.length]; // 设置收件人的邮箱
        for (int i = 0; i < toAddress.length; i++) {
            toAddress[i] = new InternetAddress(toEmail[i]);
        }
        message.setRecipients(Message.RecipientType.TO, toAddress);
 
        message.setSubject(mailSubject, Charsets.UTF_8.name());
 
        String msg = mailContent;
 
        MimeBodyPart mimeBodyPart = new MimeBodyPart();
        mimeBodyPart.setContent(msg, messageType);
 
        Multipart multipart = new MimeMultipart();
        multipart.addBodyPart(mimeBodyPart);
        //关键代码：发送附件
        if(fileList != null){
            for(File file : fileList){
                MimeBodyPart appendix = new MimeBodyPart();
                appendix.setDataHandler(new DataHandler(new FileDataSource(file.getAbsolutePath())));
                appendix.setFileName(file.getName());
                multipart.addBodyPart(appendix);
            }
        }
        message.setContent(multipart);
        Transport.send(message);
    }

　2、其实和发送普通邮件的基本差不多。只是加了下面的代码，所以发送不带附件和带附件的邮件，都可以用这个方法

//关键代码：发送附件
        if(fileList != null){
            for(File file : fileList){
                MimeBodyPart appendix = new MimeBodyPart();
                appendix.setDataHandler(new DataHandler(new FileDataSource(file.getAbsolutePath())));
                appendix.setFileName(file.getName());
                multipart.addBodyPart(appendix);
            }
        }