[ Java 代碼範本 ] 使用 JavaMail 發送/接收 Gmail

參考至 這裡
前言 :
Here’s two examples to show how to use JavaMail API method to send an email via Gmail SMTP server using both TLS and SSL connection.

JavaMail – GMail via TLS :
Sending an email via Gmail SMTP server using TLS connection. 範例代碼如下 :

- GmailApp1.java : Using TLS to send Gmail

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1. package john.mail;  
2.   
3. import java.util.Properties;  
4.   
5. import javax.mail.Authenticator;  
6. import javax.mail.Message;  
7. import javax.mail.MessagingException;  
8. import javax.mail.PasswordAuthentication;  
9. import javax.mail.Session;  
10. import javax.mail.Transport;  
11. import javax.mail.internet.InternetAddress;  
12. import javax.mail.internet.MimeMessage;  
13.   
14. public class GmailApp1 {  
15.     public static void main(String args[]) {  
16.         String host = "smtp.gmail.com";  
17.         int port = 587;  
18.         final String username = "puremonkey2007@gmail.com";  
19.         final String password = "your password";  
20.   
21.         Properties props = new Properties();  
22.         props.put("mail.smtp.host", host);  
23.         props.put("mail.smtp.auth", "true");  
24.         props.put("mail.smtp.starttls.enable", "true");  
25.         props.put("mail.smtp.port", port);  
26.           
27.         Session session = Session.getInstance(props,new Authenticator(){  
28.               protected PasswordAuthentication getPasswordAuthentication() {  
29.                   return new PasswordAuthentication(username, password);  
30.               }} );  
31.            
32.         try {  
33.   
34.         Message message = new MimeMessage(session);  
35.         message.setFrom(new InternetAddress("puremonkey2007@gmail.com"));  
36.         message.setRecipients(Message.RecipientType.TO,   
37.                         InternetAddress.parse("john_k_lee@trend.com.tw"));  
38.         message.setSubject("Testing Subject");  
39.         message.setText("Dear Mail Crawler,\n\n No spam to my email, please!");  
40.   
41.         Transport transport = session.getTransport("smtp");  
42.         transport.connect(host, port, username, password);  
43.   
44.         Transport.send(message);  
45.   
46.         System.out.println("Done");  
47.   
48.         } catch (MessagingException e) {  
49.             throw new RuntimeException(e);  
50.         }  
51.     }  
52. }  

JavaMail – GMail via SSL :
Sending an email via Gmail SMTP server using SSL connection. 範例代碼如下 :

- GmailApp2.java : Send Gmail through SSL

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1. package john.mail;  
2.   
3. import java.util.Properties;  
4. import javax.mail.Authenticator;  
5. import javax.mail.Message;  
6. import javax.mail.MessagingException;  
7. import javax.mail.PasswordAuthentication;  
8. import javax.mail.Session;  
9. import javax.mail.Transport;  
10. import javax.mail.internet.InternetAddress;  
11. import javax.mail.internet.MimeMessage;  
12.   
13. public class GmailApp2 {  
14.   
15.     public static void main(String[] args) {  
16.         final String username = "puremonkey2007@gmail.com";  
17.         final String password = "your password";  
18.   
19.         Properties props = new Properties();  
20.         props.put("mail.smtp.host", "smtp.gmail.com");  
21.         props.put("mail.smtp.socketFactory.port", "465");  
22.         props.put("mail.smtp.socketFactory.class",  
23.                 "javax.net.ssl.SSLSocketFactory");  
24.         props.put("mail.smtp.auth", "true");  
25.         props.put("mail.smtp.port", "465");  
26.   
27.         Session session = Session.getInstance(props, new Authenticator() {  
28.             protected PasswordAuthentication getPasswordAuthentication() {  
29.                 return new PasswordAuthentication(username, password);  
30.             }  
31.         });  
32.   
33.         try {  
34.   
35.             Message message = new MimeMessage(session);  
36.             message.setFrom(new InternetAddress("puremonkey2007@gmail.com.tw"));  
37.             message.setRecipients(Message.RecipientType.TO, InternetAddress  
38.                     .parse("john_k_lee@trend.com.tw"));  
39.             message.setSubject("Testing Subject");  
40.             message  
41.                     .setText("Dear Mail Crawler,\n\n No spam to my email, please!");  
42.   
43.             Transport.send(message);  
44.             System.out.println("Done");  
45.   
46.         } catch (MessagingException e) {  
47.             throw new RuntimeException(e);  
48.         }  
49.     }  
50. }  

補充說明 :
* JavaMail API – Sending email via Gmail SMTP example
* 利用JavaMail 收/發 Gmail 郵件(SSL)

Gmail目前已经启用了POP3和SMTP服务，与其他邮箱不同的是Gmail提供的POP3和SMTP是使用安全套接字层SSL的，因此常规的JavaMail程序是无法收发邮件的，下面是使用JavaMail如何收取Gmail邮件以及发送邮件的代码...

This message was edited 6 times. Last update was at 08/12/2010 17:02:29