JSP - Sending Email

Mailing is an important concept used within a web page that helps send an email from the website as an instant message. Such a service is usually attached to a website to connect the audience and users and share their thoughts and approaches. The Java Mail API provides mailing services on any JSP-based site. This tutorial will teach you how to develop and implement a mailing system within your JSP application.

Mailing API for JSP (JavaMail API)

The JavaMail API is a set of classes that support sending and receiving emails in Java. It allows you to send emails from a Java application or web application (such as a JSP, Servlet, or JavaFX application).

The JavaMail API includes classes that represent the various components of an email message, such as the message itself, addresses, attachments, and so on. It also includes classes that enable you to send and receive email using various protocols, such as SMTP (Simple Mail Transfer Protocol) for sending email and POP3 (Post Office Protocol version 3) and IMAP (Internet Message Access Protocol) for receiving email.

You will need to download the JavaMail library and include it in your project to use the JavaMail API. You will also need to configure your application with the appropriate mail server settings (such as the hostname, port number, and authentication information).

Java Mail API is implemented for composing, reading, and writing emails. For this, you must include jars of javax.mail and javax.mail.activation for sending emails using JSP. Such packages will have core classes of Java Mail API. This mailing API will offer classes that will comprise of mailing system. Java Mailing API is also essential for receiving emails via SMTP, POP3, and IMAP protocols.

You can download the latest version of JavaMail API from here JavaMail API. Another way to integrate email service to your JSP code is via JavaBeans Activation Framework JAF (Version 1.0.2), which can be downloaded from JavaBeans Activation Framework

Here is an example of how you could use the JavaMail API to send an email from a JSP:

Example Program:

<%@ page import="java.util.*,javax.mail.*" %>

<%
String to = "[email protected]";
String from = "[email protected]";
String subject = "Email Subject";
String message = "This is the email message.";

// Get system properties
Properties properties = System.getProperties();

// Set up mail server
properties.setProperty("mail.smtp.host", "smtp.example.com");

// Get the default Session object.
Session session = Session.getDefaultInstance(properties);

try {
   // Create a default MimeMessage object.
   MimeMessage mimeMessage = new MimeMessage(session);

   // Set From: header field of the header.
   mimeMessage.setFrom(new InternetAddress(from));

   // Set To: header field of the header.
   mimeMessage.addRecipient(Message.RecipientType.TO, new InternetAddress(to));

   // Set Subject: header field
   mimeMessage.setSubject(subject);

   // Now set the actual message
   mimeMessage.setText(message);

   // Send message
   Transport.send(mimeMessage);
   out.println("Email sent successfully!");
} catch (MessagingException mex) {
   mex.printStackTrace();
}
%>

This code first imports the necessary classes from the JavaMail API. It then defines the email recipient, sender, subject, and message.

Next, the code gets the system properties and sets up the mail server using the mail.smtp.host property. It then creates a default Session object and uses it to create a new MimeMessage object.

The MimeMessage object is then configured with the sender, recipient, subject, and message. Finally, the message is sent using the Transport.send() method.