How to use JavaMail to send

Transcription

1 Chapter 15 How to use JavaMail to send Objectives Applied Knowledge

2 How works Sending client Mail client software Receiving client Mail client software SMTP Sending server Mail server software POP Receiving server Mail server software Three protocols for sending and retrieving messages Protocol Description

3 Another protocol that s used with Protocol Description The JAR files for the JavaMail API File Description How to install the JavaMail API

4 How to install the JavaBeans Activation Framework API Three packages for sending Package Description

5 Code that uses the JavaMail API to send an try // 1 - get a mail session Properties props = new Properties(); props.put("mail.smtp.host", "localhost"); Session session = Session.getDefaultInstance(props); // 2 - create a message Message message = new MimeMessage(session); message.setsubject(subject); message.settext(body); // 3 - address the message Address fromaddress = new InternetAddress(from); Address toaddress = new InternetAddress(to); message.setfrom(fromaddress); message.setrecipient(message.recipienttype.to, toaddress); Code that uses the JavaMail API (cont.) // 4 - send the message Transport.send(message); catch (MessagingException e) log(e.tostring());

6 Common properties that can be set for a Session object Property Description How to get a mail session for a local SMTP server Properties props = new Properties(); props.put("mail.smtp.host", "localhost"); Session session = Session.getDefaultInstance(props); Another way to get a mail session for a local SMTP server Properties props = new Properties(); props.put("mail.transport.protocol", "smtp"); props.put("mail.smtp.host", "localhost"); props.put("mail.smtp.port", 25); Session session = Session.getDefaultInstance(props); session.setdebug(true);

7 How to get a mail session for a remote SMTP server Properties props = new Properties(); props.put("mail.transport.protocol", "smtps"); props.put("mail.smtps.host", "smtp.gmail.com"); props.put("mail.smtps.port", 465); props.put("mail.smtps.auth", "true"); props.put("mail.smtps.quitwait", "false"); Session session = Session.getDefaultInstance(props); session.setdebug(true); How to create a mail session

8 How to create a message Message message = new MimeMessage(session); How to set the subject line of a message message.setsubject("order Confirmation"); How to set the body of a plain text message message.settext("thanks for your order!"); How to set the body of an HTML message message.setcontent( "<H1>Thanks for your order!</h1>", "text/html"); How to create a message

9 How to set the From address Address fromaddress = new InternetAddress("cds@murach.com"); message.setfrom(fromaddress); How to set the To address Address toaddress = new InternetAddress("andi@yahoo.com"); message.setrecipient( Message.RecipientType.TO, toaddress); How to set the CC address Address ccaddress = new InternetAddress("ted@yahoo.com"); message.setrecipient( Message.RecipientType.CC, ccaddress); How to set the BCC address Address bccaddress = new InternetAddress("jsmith@gmail.com"); message.setrecipient( Message.RecipientType.BCC, bccaddress); How to include an address and a name Address toaddress = new InternetAddress( "andi@yahoo.com", "Andrea Steelman"); How to send a message to multiple recipients Address[] maillist = new InternetAddress("andi@hotmail.com"), new InternetAddress("joelmurach@yahoo.com"), new InternetAddress("jsmith@gmail.com") ; message.setrecipients( Message.RecipientType.TO, maillist); How to add recipients to a message Address toaddress = new InternetAddress("joelmurach@yahoo.com"); message.addrecipient( Message.RecipientType.TO, toaddress);

10 How to address a message How to send a message when no authentication is required Transport.send(message); How to send a message when authentication is required Transport transport = session.gettransport(); transport.connect("johnsmith@gmail.com", "sesame"); transport.sendmessage( message, message.getallrecipients()); transport.close();

11 How to send a message A helper class for sending an with a local SMTP server package util; import java.util.properties; import javax.mail.*; import javax.mail.internet.*; public class MailUtilLocal public static void sendmail(string to, String from, String subject, String body, boolean bodyishtml) throws MessagingException // 1 - get a mail session Properties props = new Properties(); props.put("mail.transport.protocol", "smtp"); props.put("mail.smtp.host", "localhost"); props.put("mail.smtp.port", 25); Session session = Session.getDefaultInstance(props); session.setdebug(true);

12 A helper class for sending an with a local SMTP server (cont.) // 2 - create a message Message message = new MimeMessage(session); message.setsubject(subject); if (bodyishtml) message.setcontent(body, "text/html"); else message.settext(body); // 3 - address the message Address fromaddress = new InternetAddress(from); Address toaddress = new InternetAddress(to); message.setfrom(fromaddress); message.setrecipient( Message.RecipientType.TO, toaddress); // 4 - send the message Transport.send(message); A servlet that sends an package ; import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import javax.mail.messagingexception; import business.user; import data.userio; import util.*; public class AddTo ListServlet extends HttpServlet protected void dopost(httpservletrequest request, HttpServletResponse response) throws ServletException, IOException

13 A servlet that sends an (cont.) // get parameters from the request String firstname = request.getparameter("firstname"); String lastname = request.getparameter("lastname"); String address = request.getparameter(" address"); // create the User object and write it to a file User user = new User( firstname, lastname, address); ServletContext sc = getservletcontext(); String path = sc.getrealpath( "/WEB-INF/ List.txt"); UserIO.addRecord(user, path); // store the User object in the session HttpSession session = request.getsession(); session.setattribute("user", user); A servlet that sends an (cont.) // send to user String to = address; String from = " _list@murach.com"; String subject = "Welcome to our list"; String body = "Dear " + firstname + ",\n\n" + "Thanks for joining our list. " + "We'll make sure to send you announcements " + "about new products and promotions.\n" + "Have a great day and thanks again!\n\n" + "Kelly Slivkoff\n" + "Mike Murach & Associates"; boolean isbodyhtml = false; try MailUtilLocal.sendMail( to, from, subject, body, isbodyhtml);

14 A servlet that sends an (cont.) catch (MessagingException e) String errormessage = "ERROR: Unable to send . " + "Check Tomcat logs for details.<br>" + "NOTE: You may need to configure your " + "system as described in chapter 15.<br>" + "ERROR MESSAGE: " + e.getmessage(); request.setattribute( "errormessage", errormessage); this.log( "Unable to send . \n" + "Here is the you tried to send: \n" + "=====================================\n" + "TO: " + address + "\n" + "FROM: " + from + "\n" + "SUBJECT: " + subject + "\n" + "\n" + body + "\n\n"); A servlet that sends an (cont.) // forward request and response to JSP page String url = "/display_ _entry.jsp"; RequestDispatcher dispatcher = getservletcontext().getrequestdispatcher(url); dispatcher.forward(request, response);

15 A helper class for sending an with a remote SMTP server package util; import java.util.properties; import javax.mail.*; import javax.mail.internet.*; public class MailUtilYahoo public static void sendmail(string to, String from, String subject, String body, boolean bodyishtml) throws MessagingException // 1 - get a mail session Properties props = new Properties(); props.put("mail.transport.protocol", "smtps"); props.put("mail.smtps.host", "smtp.mail.yahoo.com"); props.put("mail.smtps.port", 465); props.put("mail.smtps.auth", "true"); Session session = Session.getDefaultInstance(props); session.setdebug(true); A helper class for sending an with a remote SMTP server (cont.) // 2 - create a message Message message = new MimeMessage(session); message.setsubject(subject); if (bodyishtml) message.setcontent(body, "text/html"); else message.settext(body); // 3 - address the message Address fromaddress = new InternetAddress(from); Address toaddress = new InternetAddress(to); message.setfrom(fromaddress); message.setrecipient( Message.RecipientType.TO, toaddress);

16 A helper class for sending an with a remote SMTP server (cont.) // 4 - send the message Transport transport = session.gettransport(); transport.connect("johnsmith", "sesame"); transport.sendmessage( message, message.getallrecipients()); transport.close();