rivate?boolean?add(HttpServletRequest?req,?HttpServletResponse?resp)
?????????throws?ServletException,?IOException?{
?????String?id?=?req.getParameter("id");
?????int?number?=?Integer.parseInt(req.getParameter("number"));
?????Items?item?=?idao.getItemsById(Integer.parseInt(id));
?????
?????if?(req.getSession().getAttribute("cart")?==?null)?{
?????????Cart?cart?=?new?Cart();
?????????req.getSession().setAttribute("cart",?cart);
?????????cart.addGoodsInCart(item,?number);
?????}?else?{
?????????Cart?cart?=?(Cart)?req.getSession().getAttribute("cart");
?????????cart.addGoodsInCart(item,?number);
?
?????}
?????return?true;
?
?}