Java实现邮件发送QQ邮箱带附件

  javax.mailmail1.4.7

 import java.io.File; import java.io.UnsupportedEncodingException; import java.util.Properties; import javax.activation.DataHandler; import javax.activation.FileDataSource; import javax.mail.Authenticator; import javax.mail.BodyPart; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.NoSuchProviderException; import javax.mail.PasswordAuthentication; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeBodyPart; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMultipart; import javax.mail.internet.MimeUtility; /** * 邮件发送工具类 
 * Author:杨杰超
 * Date:2020年1月9日 下午12:02:51 
 * Copyright (c) 2020, yangjiechao@dingtalk.com All Rights Reserved.
 * */ public class SendMail { /** * 想QQ邮箱发送邮件 * * @param formMail *   发送人邮箱地址 * @param descMail *   接收人邮箱地址 * @param subject *   邮箱主题 * @param content *   邮箱内容 * @param files *   附件列表 * @param contentType *   内容格式 * @param password *   SMTP密码 * @throws MessagingException * @throws UnsupportedEncodingException */ public static void sendQQMail(String formMail, String descMail, String subject, String content, File[] files, String contentType, String password) throws MessagingException, UnsupportedEncodingException { Properties properties = new Properties(); properties.setProperty("mail.smtp.host", "smtp.qq.com"); properties.setProperty("mail.smtp.port", "465"); properties.setProperty("mail.smtp.auth", "true"); properties.setProperty("mail.debug", "true"); properties.setProperty("mail.transport.protocol", "smtp"); properties.setProperty("mail.smtp.ssl.enable", "true"); Session session = Session.getInstance(properties, new Authenticator() { @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(formMail, password); } }); Message message = new MimeMessage(session); try { message.setFrom(new InternetAddress(formMail)); message.setRecipient(Message.RecipientType.TO, new InternetAddress(descMail)); message.setSubject(subject); // 是否存在附件 if (null != files && files.length > 0) { MimeMultipart multipart = new MimeMultipart(); BodyPart contentPart = new MimeBodyPart(); contentPart.setContent(content, contentType); multipart.addBodyPart(contentPart); for (File file : files) { MimeBodyPart attachment = new MimeBodyPart(); DataHandler dh2 = new DataHandler(new FileDataSource(file)); attachment.setDataHandler(dh2); attachment.setFileName(MimeUtility.encodeText(dh2.getName())); multipart.addBodyPart(attachment); } multipart.setSubType("mixed"); message.setContent(multipart); message.saveChanges(); } // 普通 else { message.setContent(content, contentType); } Transport transport = session.getTransport(); transport.connect(formMail, password); Transport.send(message); } catch (UnsupportedEncodingException e) { throw e; } catch (NoSuchProviderException e) { throw e; } catch (MessagingException e) { throw e; } } public static void main(String[] args) throws MessagingException, UnsupportedEncodingException { // 由哪个邮箱发送 String formMail = "********@qq.com"; // QQ邮箱>设置>账户 开启POP3/SMTP服务 查看smtp密码 String smtpPassword = "****************"; // 发送人邮箱地址 String descMail = "470947852@qq.com"; String contentType = "text/html;charset=UTF-8"; String subject = "测试邮件发送，含附件"; String content = "test send mail, 这里是中文"; File[] files = new File[2]; files[0] = new File("C:/test_1.xls"); files[1] = new File("C:/test_2.xls"); SendMail.sendQQMail(formMail, descMail, subject, content, files, contentType, smtpPassword); } }