Day 12. Servlets

On Day 11, “JavaMail,” you worked on integrating JavaMail into your applications. This built on the previous chapters that covered the Java Message System and Message-Driven Beans, and you have now completed this book's coverage of asynchronous messaging in J2EE.

Today, you will start to work on the new topic area—providing a Web interface to your application. You will start by using Java servlets with a Web server to handle HTTP requests. These servlets will generate HTML responses to be displayed by using a browser. In today's lesson, you will study

• The power of Java servlets and when to use them

• The supporting technologies, namely HTTP and HTML

• How to create and track HTTP sessions

• How to develop a Web application using servlets, with servlet filtering and event listening