View Data Table in Java

jsp Page

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package servlet;
import java.io.IOException;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import logic.logic;
/**
 *
 * @author Pintoo
 */
public class dummy extends HttpServlet
{
    logic logic = new logic();
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
    {
        String name = request.getParameter("name");
        String pass = request.getParameter("pass");
        String value = request.getParameter("submit");
        // System.out.println(name);
        if (value.equals("Submit"))
        {
            logic.insert(name, pass);
        }
        else if (value.equals("Delete"))
        {
            logic.Delete(name);
        }
        else if (value.equals("Select"))
        {
            List < HashMap > datarow = logic.select();
            request.setAttribute("resultset", datarow);
            RequestDispatcher rd = request.getRequestDispatcher("/getdata.jsp");
            rd.forward(request, response);
        }
    }
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
    {
        doGet(request, response);
    }
}

Logic Class

public List < HashMap > select()
{
    List < HashMap > datarow = new ArrayList < > ();
    try
    {
        Class.forName(JDBC_DRIVER);
        conn = DriverManager.getConnection(DB_URL, USER, PASS);
        stmt = conn.createStatement();
        HashMap < String, String > data = null;
        //JOptionPane.showMessageDialog(this, "Saved");
        rs = stmt.executeQuery("select * from Texttbl");
        while (rs.next())
        {
            data = new HashMap < > ();
            data.put("name", rs.getString("name"));
            data.put("password", rs.getString("pass"));
            datarow.add(data);
        }
    }
    catch (Exception e)
    {
        e.printStackTrace();
        System.out.println("Error connecting databsse" + e.getStackTrace());
    }
    finally
    {
        try
        {
            if (conn != null)
            {
                conn.close();
            }
            if (stmt != null)
            {
                stmt.close();
            }
        }
        catch (Exception e)
        {
            System.out.println(e.getStackTrace());
        }
    }
    return datarow;
}

Servlet

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package servlet;
import java.io.IOException;
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import logic.logic;
/**
 *
 * @author Pintoo
 */
public class dummy extends HttpServlet
{
    logic logic = new logic();
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
    {
        String name = request.getParameter("name");
        String pass = request.getParameter("pass");
        String value = request.getParameter("submit");
        // System.out.println(name);
        if (value.equals("Submit"))
        {
            logic.insert(name, pass);
        }
        else if (value.equals("Delete"))
        {
            logic.Delete(name);
        }
        else if (value.equals("Select"))
        {
            List < HashMap > datarow = logic.select();
            request.setAttribute("resultset", datarow);
            RequestDispatcher rd = request.getRequestDispatcher("/getdata.jsp");
            rd.forward(request, response);
        }
    }
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
    {
        doGet(request, response);
    }
}