How to call the servlet without form action

Hi

I have designed login page by using jsp,script and iam verifying to user name and password from the server by using servlet mapping its working fine. but i need to change some modification, after i click submit button its wants to open one jsp page how i wants to code i don't know.

In form action i have given action to myservlet class, please help me how i wants to code. Iam beginner and new for this field, below i have attached my code.

Login.jsp

WelcomeServlet.java

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
 
import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
public class WelcomeServlet extends HttpServlet {
 
@Override
public void init(ServletConfig config) throws ServletException {
super.init(config);
}
 
 
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
	PrintWriter out = response.getWriter();
	  String connectionURL = "jdbc:mysql://localhost:3306/pdfpro";
	  Connection connection=null;
	  ResultSet rs;
	  String userName=request.getParameter("user");
	  String passwrd=request.getParameter("pass");
	  response.setContentType("text/html");
	  int count=0; 
	  try {
	 // Load the database driver
	  Class.forName("com.mysql.jdbc.Driver");
	  // Get a Connection to the database
	  connection = DriverManager.getConnection(connectionURL, "root", "root"); 
	  //Add the data into the database
	  	  Statement s = connection.createStatement();
	  s.executeQuery ("select * from adduser where username='"+userName+"' and password='"+passwrd+"'");
	  rs = s.getResultSet();
	  while (rs.next ()){
	  count++;
	  }
	  if(count>0){
		  out.println("You are Authenticated person \n");
		  out.println("<br>");
          out.println("welcome "+userName);
          }
         else{
        	 out.println("You are not an authentic person");
         }
	  rs.close ();
	  s.close ();
	  }catch(Exception e){
	  System.out.println("Exception is ;"+e);
	  }
 
}
 
 
public void destroy() {
 
}
}

web.xml:

now my servlet code also wants to work and in the same time after i click submit button one jsp page wants to open.

Please help me.

Thanks in advance.

What i understood -
You want to submit your form to a servlet and then display a JSP
You can do that, You need to do servlet mapping in web.xml as usual and in the servlet after your business logic is dealt with use the view as jsp. Heres how...

Read more about MVC pattern

Thank you so much. its working fine