Java ผมขอคำแนะนำ เรื่องของ MVC ทีครับผมไม่ค่อยเข้าใจครับ

package model;
import java.sql.*;
public class connectDB {
	public static Connection connectDB;
	public static Connection getConnect(){
		   try {
	 			Class.forName("com.mysql.jdbc.Driver");
	 		} catch (ClassNotFoundException e) {
	 			// TODO Auto-generated catch block
	 			e.printStackTrace();
	 		}
	 		   try {
	 			connectDB=DriverManager.getConnection("jdbc:mysql://localhost:3306/ajaxdb","root","");
	 			System.out.print("success");
	 		} catch (SQLException e) {
	 			// TODO Auto-generated catch block
	 			e.printStackTrace();
	 		}
		return connectDB;
		
	}
}

public class resumeDAO {
	private Connection connDB;
	private String firstName;
	public resumeDAO(){
		connDB = connectDB.getConnect();
	}
	public String getResume(){
		try {
			Statement s = connDB.createStatement();
			  ResultSet r = s.executeQuery("select * from resume");
              while(r!=null&&r.next()){
                 firstName = r.getString("firstName");
                  
   
              }
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return firstName;
	}
	
}

package control;

import java.io.IOException;

import javax.servlet.DispatcherType;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import model.resumeDAO;

/**
 * Servlet implementation class simpleServlet
 */
@WebServlet("/simpleServlet")
public class simpleServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public simpleServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		System.out.print("hello javaservlet");
		resumeDAO re = new resumeDAO();
		request.setAttribute("first", re.getResume());
		
		
		getServletContext().getRequestDispatcher("/index.jsp").forward(request,response);
		
		
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		response.setContentType("text/html");
		
	}

}

<input type="text" value="${firstName}">