Структура сайта на JSP + Servlet

package aau.project3.stp;
 
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Array;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
 
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
 
import com.mysql.jdbc.PreparedStatement;
 
//@WebServlet(description = "Main menu renderer", urlPatterns = { "/menu" })
public class Menu extends HttpServlet {
    private static final long serialVersionUID = 1L;
    private Connection conn;
    String url = "jdbc:mysql://localhost/", dbname = "testdb", login = "root", password = "pass";
    public Menu() {
        super();
       
    }
 
    public void init(ServletConfig config) throws ServletException {
        try {
            Class.forName("com.mysql.jdbc.Driver");
            conn = DriverManager.getConnection(url + dbname, login, password);
        } catch (ClassNotFoundException e) {        
            e.printStackTrace();
        } catch (SQLException e) {      
            e.printStackTrace();
        }
    }
 
    public void destroy() {
        try {
            conn.close();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
 
 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        PrintWriter out = response.getWriter();
        out.print("Conection sucessfull " + conn);
        try {
            request.setCharacterEncoding("utf-8");
            response.setContentType("text/html");
            Statement st = conn.createStatement();
            ResultSet result = st.executeQuery("SELECT * FROM pages;");
            ArrayList<ArrayList<String>> urls = getMenuLinksArray(result);
            ServletContext ctx = request.getServletContext();
            ctx.setAttribute("urls", urls);//Posting array of pages table data to the context
            RequestDispatcher rd = request.getRequestDispatcher("index.jsp");
            String view = "mainlist";
            request.setAttribute("view", view);
            rd.forward(request, response);
        } catch (SQLException e) {
            out.print(e.getMessage());
            e.printStackTrace();
        }
    }
    
    private ArrayList<ArrayList<String>> getMenuLinksArray(ResultSet rs)throws SQLException{
        ArrayList<ArrayList<String>> links = new ArrayList<ArrayList<String>>();
        int i=0;
        while(rs.next()){
            links.add(new ArrayList<String>());
            links.get(i).add(rs.getString(1));
            links.get(i).add(rs.getString(2));
            links.get(i).add(rs.getString(3));
            links.get(i).add(rs.getString(4));
            links.get(i).add(rs.getString(5));
            i++;
        }
        
        return links;
    }
 
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        
    }
 
}