Java发送邮件

 1 public static void Send163Email() {
 2         String to = "to@163.com";
 3         String from = "from@163.com";
 4         
 5         Properties properties = System.getProperties();
 6 
 7         properties.put("mail.host", "smtp.163.com");
 8         properties.put("mail.transport.protocol", "smtp");
 9         properties.put("mail.smtp.auth", true);
10         
11         Session session = Session.getDefaultInstance(properties, 
12                 new javax.mail.Authenticator(){
13                     protected PasswordAuthentication getPasswordAuthentication() {
14                         return new PasswordAuthentication(
15                             "from@163.com", "授权码");// Specify the Username and the PassWord
16                     }
17             });
18         session.setDebug(true);
19         
20         MimeMessage message = new MimeMessage(session);
21 
22         try {
23             message.setFrom(new InternetAddress(from));
24             message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
25             message.setSubject("This is the Subject Line!");
26             message.setText("This is actual message.");
27             Transport.send(message);
28             System.out.println("Sent message sucessfully!");
29         } catch (MessagingException mex) {
30             mex.printStackTrace();
31         }
32     }

 1 public static void Send163EmailWithAttachment() {
 2         String to = "to@163.com";
 3         String from = "from@163.com";
 4         
 5         Properties properties = System.getProperties();
 6 
 7         properties.put("mail.host", "smtp.163.com");
 8         properties.put("mail.transport.protocol", "smtp");
 9         properties.put("mail.smtp.auth", true);
10         
11         Session session = Session.getDefaultInstance(properties, 
12                 new javax.mail.Authenticator(){
13                     protected PasswordAuthentication getPasswordAuthentication() {
14                         return new PasswordAuthentication(
15                             "from@163.com", "授权码");// Specify the Username and the PassWord
16                     }
17             });
18         session.setDebug(true);
19         
20         MimeMessage message = new MimeMessage(session);
21 
22         try {
23             message.setFrom(new InternetAddress(from));
24             message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
25             message.setSubject("This is the Subject Line(Text and file)!");
26 
27             BodyPart messageBodyPart=new MimeBodyPart();
28             messageBodyPart.setText("This is a message body.\n2017年11月28日");
29             Multipart multipart=new MimeMultipart();
30             multipart.addBodyPart(messageBodyPart);
31             //attachment
32             messageBodyPart=new MimeBodyPart();
33             String filename="文件名（带路径）";
34             DataSource source=new FileDataSource(filename);
35             messageBodyPart.setDataHandler(new DataHandler(source));
36             messageBodyPart.setFileName(filename);
37             multipart.addBodyPart(messageBodyPart);
38             
39             message.setContent(multipart);
40             Transport.send(message);
41             System.out.println("Sent message sucessfully!");
42         } catch (MessagingException mex) {
43             mex.printStackTrace();
44         }
45     }