Special Edition Using Java™ Server Pages and Servlets

Chapter 3. Getting Started with Servlets

In this chapter

• A "Hello World" Servlet

• The Anatomy of a Servlet

• Sending a Response to the Browser

• The HttpServlet Class

• Choosing Between Java Server Pages and Servlets

A "Hello World" Servlet

Servlets are a little more involved than Java Server Pages, but in simple cases they aren't too bad. Listing 3.1 shows you the "Hello World" program in servlet form.

Example 3.1. Source Code for HelloWorldServlet.java

 package usingjsp; import javax.servlet.*; import java.io.*; public class HelloWorldServlet extends GenericServlet { public void service(ServletRequest request, ServletResponse response) throws IOException { // Tell the Web server that the response is HTML response.setContentType("text/html"); // Get the PrintWriter ...