自動發信

我使用的是JAVAMAIL來達成自動發信的功能,
好處是你只要有一個有提供外部SMTP的信箱,
不用自己架伺服器,
缺點是在發信的時候需要一些時間,
以下我是使用GMAIL為例

try{
String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
Properties props = System.getProperties();
  props.setProperty("mail.smtp.host", "smtp.gmail.com");  //設定使用GMAIL的SMTP
  props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
  props.setProperty("mail.smtp.socketFactory.fallback", "false");
  props.setProperty("mail.smtp.port", "465");             //465是GMAIL提供的SMTP PORT
  props.setProperty("mail.smtp.socketFactory.port", "465");
  props.put("mail.smtp.auth", "true");


  String username = GMAIL帳號
  String password = GMAIL密碼

    Session sendMailSession;
  Store store;
  Transport transport;
  sendMailSession = Session.getInstance(props, new Authenticator(){
    protected PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(username ,password );
    }});


       // -- Create a new message --
  Message msg = new MimeMessage(sendMailSession);

  // -- Set the FROM and TO fields --
  msg.setFrom(new InternetAddress("寄件者信箱"));
  msg.setRecipients(Message.RecipientType.TO, 
    InternetAddress.parse("收件者信箱",false));
  msg.setSubject("標題");
  msg.setText("內容");
  msg.setSentDate(new Date());
  Transport.send(msg);
  
 // system.out.println("Message sent.");

 

  // -- Set the FROM and TO fields --
 
    } 
catch(MessagingException m) 
{ 
out.println(m.toString()); 
}