TLS/SSL使用javamail

// get the mail configuration options

String mailHost     = servletConfig.getServletContext().getInitParameter( "mailHost" );

String mailTo       = servletConfig.getServletContext().getInitParameter( "mailTo" );

String mailFrom     = servletConfig.getServletContext().getInitParameter( "mailFrom" );

String mailUser     = servletConfig.getServletContext().getInitParameter( "mailUser" );

String mailPassword = servletConfig.getServletContext().getInitParameter( "mailPassword" );

String mailTls      = servletConfig.getServletContext().getInitParameter( "mailTls" );

String mailSsl      = servletConfig.getServletContext().getInitParameter( "mailSsl" );

String mailPort     = servletConfig.getServletContext().getInitParameter( "mailPort" );

String mailDebug    = servletConfig.getServletContext().getInitParameter( "mailDebug" );

 

// check on the parameters

if (mailHost == null || mailTo == null || mailFrom == null ) {

   throw new ServletException( "Unable to get mail init parameters" );

}

 

// Build the message

StringBuilder message = new StringBuilder( "Start messagen" );

 

// add the rest of the message

message.apppend( "line by line construct the message" );

 

// set the base properties for sending email

Properties mailProperties = System.getProperties();

mailProperties.put( "mail.transport.protocol" , "smtp" );

mailProperties.put( "mail.smtp.host" , mailHost);

 

// check to see if we need to use a non standard port

if (mailPort != null ) {

   mailProperties.put( "mail.smtp.port" , mailPort);

}

 

// check to see if we need to use SSL

if (mailSsl != null ) {

   mailProperties.put( "mail.smtp.ssl.enable" , "true" );

   mailProperties.put( "mail.smtp.ssl.trust" , "*" );

 

   if (mailPort != null ) {

     mailProperties.put( "mail.smtp.socketFactory.port" , mailPort);

   } else {

     // assume default standard port for SSL SMTP

     mailProperties.put( "mail.smtp.socketFactory.port" , "465" );

   }

 

   mailProperties.put( "mail.smtp.socketFactory.class" , "javax.net.ssl.SSLSocketFactory" );

   mailProperties.put( "mail.smtp.socketFactory.fallback" , "false" );

}

 

// check to see if we need to output debug messages

if (mailDebug != null && mailDebug.equals( "yes" )) {

   mailProperties.put( "mail.debug" , "true" );

}

 

// do we need to use TLS?

if (mailTls != null && mailTls.equals( "yes" )) {

   mailProperties.put( "mail.smtp.starttls.enable" , "true" );

}

 

// start the email session

Session mailSession;

 

// do we need to do authentication

if (mailUser != null ) {

   mailProperties.put( "mail.smtp.auth" , true );

   mailSession = Session.getInstance(mailProperties, new SMTPAuthenticator(mailUser, mailPassword));

} else {

   mailSession = Session.getInstance(mailProperties, null );

}

 

try {

   // construct the message

   Message mailMessage = new MimeMessage(mailSession); // base object

   mailMessage.setFrom( new InternetAddress(mailFrom)); // set from address

   mailMessage.setRecipients(Message.RecipientType.TO, InternetAddress.parse(mailTo, false )); // set to address

   mailMessage.setSubject( "Email subject" ); // subject

   mailMessage.setText(message.toString()); // body of the message

 

   // add additional headers

   mailMessage.setHeader( "X-Mailer" , "JavaMail" );

   mailMessage.setSentDate( new Date());

 

   // send the message

   Transport.send(mailMessage);

 

} catch (javax.mail.internet.AddressException ex) {

   throw new ServletException( "Unable to prepare mail message" , ex);

} catch (javax.mail.MessagingException ex) {

   throw new ServletException( "Unable to send mail message" , ex);

}