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Servlet Build Deploy Run Hello World Application

Last update: 5/3/2017 6:34:00 AM


To understand how servlet works on Apache web server, it is better to start from the beginning without using any IDE, or helper application that organizes the environment for you. Implementing the following steps is enough to make your Hello World application worked.

This article assumes that you have already had a Java environment and Apache server in your system.

1. Create a class HelloWorldServlet

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class HelloWorldServlet extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response) {
		PrintWriter out = response.getWriter();
		out.println("<html><body><h1>Hello World</h1>");
		java.util.Date now = new java.util.Date();
		out.println("<h1>Time: " + now + " </h1></body></html>");

Put this java file into src folder.

2. Create a web.xml file

<?xml version="1.0" encoding="ISO-8859-1" ?>

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"

        This is a simple web application with a source code organization
        based on the recommendations of the Application Developer"s Guide.




Put this file into etc folder.

3. Create a directory structure as below.

4. Move the project root folder with the sub files to under the webapps folder where apache server places its web applications. Example path for windows, depends on your environment, D:\Apache Software Foundation\apache-tomcat-7.0.47\webapps\

5. Build the project under the apache web application project directory.

6. Jump to tomcat directory in cmd

D:\Apache Software Foundation\apache-tomcat-7.0.47

7. Compile the source java file

javac -classpath lib/servlet-api.jar -d webapps/ServletHelloWorld/WEB-INF/classes webapps/ServletHelloWorld/src/HelloWorldServlet.java

8. Open up the browser and run the application.


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