Properties properties = new Properties();
properties.setProperty("mail.host", "smtp.qq.com");
properties.setProperty("mail.transport.protocol", "smtp");
properties.setProperty("mail.smtp.auth", "true");
properties.setProperty("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
properties.setProperty("mail.smtp.port", "465");
Session session = Session.getDefaultInstance(properties);
session.setDebug(true);

MimeMessage mimeMessage = new MimeMessage(session);
mimeMessage.addRecipients(Message.RecipientType.TO, "111@qq.com");//設(shè)置收信人
mimeMessage.addRecipients(Message.RecipientType.CC, "222@qq.com");//抄送
mimeMessage.setFrom("1510161612@qq.com");//郵件發(fā)送人
mimeMessage.setSubject("測試郵件主題");//郵件主題
mimeMessage.setContent("Hello,這是一封測試郵件", "text/html;charset=utf-8");//正文

Transport transport = session.getTransport();
transport.connect("smtp.qq.com", "333@qq.com", "剛剛申請到的授權(quán)碼");
transport.sendMessage(mimeMessage, mimeMessage.getAllRecipients());//發(fā)送郵件，第二個參數(shù)為收件人
transport.close();

MimeMessage mimeMessage = new MimeMessage(session);
mimeMessage.addRecipients(Message.RecipientType.TO, "111@qq.com");//設(shè)置收信人
mimeMessage.addRecipients(Message.RecipientType.CC, "222@qq.com");//抄送
mimeMessage.setFrom("333@qq.com");//郵件發(fā)送人
mimeMessage.setSubject("測試郵件主題");//郵件主題
MimeMultipart mixed = new MimeMultipart("mixed");
mimeMessage.setContent(mixed);//設(shè)置整封郵件的MIME消息體為混合的組合關(guān)系
MimeBodyPart attach1 = new MimeBodyPart();//創(chuàng)建附件1
MimeBodyPart attach2 = new MimeBodyPart();//創(chuàng)建附件2
MimeBodyPart content = new MimeBodyPart();//創(chuàng)建郵件正文
mixed.addBodyPart(attach1);//將附件一添加到MIME消息體中
mixed.addBodyPart(attach2);//將附件二添加到MIME消息體中
mixed.addBodyPart(content);//將正文添加到消息體中
FileDataSource fds1 = new FileDataSource(new File("C:\\Users\\sang\\Desktop\\1.png"));//構(gòu)造附件一的數(shù)據(jù)源
DataHandler dh1 = new DataHandler(fds1);//數(shù)據(jù)處理
attach1.setDataHandler(dh1);//設(shè)置附件一的數(shù)據(jù)源
attach1.setFileName("1.png");//設(shè)置附件一的文件名
//附件二的操作與附件一類似，這里就不一一注釋了
FileDataSource fds2 = new FileDataSource(new File("C:\\Users\\sang\\Desktop\\博客筆記.xlsx"));
DataHandler dh2 = new DataHandler(fds2);
attach2.setDataHandler(dh2);
attach2.setFileName(MimeUtility.encodeText("博客筆記.xlsx"));//設(shè)置文件名時，如果有中文，可以通過MimeUtility類中的encodeText方法進行編碼，避免亂碼
MimeMultipart bodyMimeMultipart = new MimeMultipart("related");//設(shè)置正文的MIME類型
content.setContent(bodyMimeMultipart);//將bodyMimeMultipart添加到正文消息體中
MimeBodyPart bodyPart = new MimeBodyPart();//正文的HTML部分
bodyPart.setContent("<h1>Hello大家好，這是一封測試郵件<img src='cid:2.png'/></h1>","text/html;charset=utf-8");
MimeBodyPart picPart = new MimeBodyPart();//正文的圖片部分
DataHandler dataHandler = new DataHandler(new FileDataSource("C:\\Users\\sang\\Desktop\\2.png"));
picPart.setDataHandler(dataHandler);
picPart.setContentID("2.png");
//將正文的HTML和圖片部分分別添加到bodyMimeMultipart中
bodyMimeMultipart.addBodyPart(bodyPart);
bodyMimeMultipart.addBodyPart(picPart);
mimeMessage.saveChanges();