public class NewUser extends HttpServlet {

/**
 * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
 * methods.
 *
 * @param request servlet request
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");

    HttpSession session = request.getSession(false);

    String [] query = new String[5];
    query[0] = (String)request.getParameter("username");
    query[1] = (String)request.getParameter("password");
    query[2] = (String)request.getParameter("confPassword");
    query[3] = (String)request.getParameter("name");
    query[4] = (String)request.getParameter("address");


    Jdbc jdbc = (Jdbc)session.getAttribute("dbbean");

    if (jdbc == null)
        request.getRequestDispatcher("/WEB-INF/conErr.jsp").forward(request, response);

    else {
        jdbc.insert(query);
        request.setAttribute("message", query[0]+" has been registered successfully!");
    }

public void insert(String[] str){
    PreparedStatement ps = null;
    try {
        ps = connection.prepareStatement("INSERT INTO CUSTOMER VALUES (?,?,?,?)",PreparedStatement.RETURN_GENERATED_KEYS);
        ps.setString(1, str[0].trim());
        ps.setString(2, str[1]);
        ps.setString(3, str[3]);
        ps.setString(4, str[4]);
        ps.executeUpdate();

        ps.close();
        System.out.println("1 row added.");
    } catch (SQLException ex) {
        Logger.getLogger(Jdbc.class.getName()).log(Level.SEVERE, null, ex);
    }

}

# | Username | Password | Name | Address | ID