How to Create Servlet Using HttpServlet Class

Program 1

import java.io.*;
import javax.servlet.http.*;
import javax.servlet.*;
public class HttpLoginServlet extends HttpServlet
{
   public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException ,IOException
   {
       PrintWriter out=response.getWriter();
       out.println("This is DoGet method of HttpServlet");

   }
   public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException ,IOException
   {
       PrintWriter out=response.getWriter();
       out.println("This is DoPost method of HttpServlet");

   }
}

Program 2

<web-app>

<servlet>
<servlet-name>mylogin</servlet-name>
<servlet-class>LoginServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>mylogin</servlet-name>
<url-pattern>/login</url-pattern>
</servlet-mapping>

</web-app>

Program 5

import java.io.*;
import javax.servlet.http.*;
import javax.servlet.*;
public class HttpLoginServlet extends HttpServlet
{
   public void doGet(HttpServletRequest request,HttpServletResponse response) throws ServletException ,IOException
   {
       PrintWriter out=response.getWriter();
       out.println("This is DoGet method of HttpServlet");

   }
   public void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException ,IOException
   {
       PrintWriter out=response.getWriter();
       out.println("This is DoPost method of HttpServlet");

   }
}