How do I read servlet init parameter?

When configuring a servlet in the web.xml file we can define some init parameters in the servlet configuration section. This init parameter can be used to define where a configuration file of our application is stored. This simple servlet below shows how to obtain these init parameters value.

package org.kodejava.example.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class InitParameterServlet extends javax.servlet.http.HttpServlet
    implements javax.servlet.Servlet {

    protected void doGet(HttpServletRequest request,
        HttpServletResponse response) throws ServletException, IOException {
    doPost(request, response);  
    }

    protected void doPost(HttpServletRequest request,
        HttpServletResponse response) throws ServletException, IOException {

    //
    // Get application configuration path
    //
    String configPath = getInitParameter("configPath");

    System.out.println("Configuration Path: " + configPath);
    }
}