How to Build a Website Using Java

By Daniel James

Java is a powerful and versatile language that can be used to develop a variety of applications, including websites. This guide will cover the basic steps involved in building a website using servlets written in Java 6 on the Apache Tomcat 6 web server. While a website may be built on Tomcat using only Java Server Pages (JSP), this guide is limited to building a simple \"Hello, World\" servlet.

Things You'll Need

  • Instance of Apache Tomcat 6
  • Java SE 6 development kit (JDK)
  • Java Servlet API library (typically named servlet-api.jar)

Step 1

On your computer, create a file called HelloWorldServlet.java with the following code:import java.io.*GOimport javax.servlet.*GOimport javax.servlet.http.*GOpublic class HelloWorld extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // The response.getWriter() method returns a PrintWriter that can be used to write // data to the output stream. We'll use it to write out a web page. PrintWriter out = response.getWriter()GO out.println(\"\")GO out.println(\"Hello, World!\")GO out.println(\"

Hello, World!

\")GO out.println(\"\")GO }}

Step 2

Compile the HelloWorldServlet.java source file into a class file using the javac command.javac -cp servlet-api.jar HelloWorldServlet.javaNote: This example assumes that servlet-api.jar is located in the same folder as HelloWorldServlet.java.

Step 3

Create a folder named WEB-INF and a file in the folder called web.xml with the following contents: HelloWorld HelloWorldServlet HelloWorld /

Step 4

Create a folder under WEB-INF named \"classes\" and copy HelloWorldServlet.class into the folder.

Step 5

Create a folder named META-INF and a file in the folder called context.xml with the following contents:

Step 6

Use the Java Archive tool (jar) to create a web application archive (war) that can be deployed to the Tomcat server:jar -cf ROOT.war .

Step 7

Copy the ROOT.war file to the Tomcat web server's \"webapps\" directory.

Step 8

View the output of the HelloWorldServlet by going to the Tomcat web server's address. (e.g., http://server:8080/ or http://192.168.0.10/)

Tips & Warnings

  • Use an Ant script to help automate the build and deployment process. This will ensure that the compilation and war file building are handled in a consistent and easy manner.