原生servlet+C3P0数据库连接池搭建的商城系统.7z

package com.itcast.web; import java.io.IOException; import java.util.ArrayList; import java.util.Arrays; import java.util.LinkedList; import java.util.List; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import com.google.gson.Gson; import com.itcast.domain.Cart; import com.itcast.domain.CartItem; import com.itcast.domain.Category; import com.itcast.domain.PageBean; import com.itcast.domain.Product; import com.itcast.service.ProductService; public class ProductServlet extends BaseServlet { // public void doGet(HttpServletRequest request, HttpServletResponse response) // throws ServletException, IOException { // String method = request.getParameter("method"); // if("category".equals(method)){ // category(request, response); // } else if("index".equals(method)){ // index(request, response); // } else if("productListByCid".equals(method)){ // productListByCid(request, response); // } else if("findProductByPid".equals(method)){ // findProductByPid(request, response); // } // // } // // public void doPost(HttpServletRequest request, HttpServletResponse response) // throws ServletException, IOException { // // TODO Auto-generated method stub // doGet(request, response); // } public void clearCart(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(); session.removeAttribute("cart"); response.sendRedirect(request.getContextPath()); } public void delProFromCart(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String pid = request.getParameter("pid"); HttpSession session = request.getSession(); Cart cart = (Cart) session.getAttribute("cart"); if(cart!=null){ Map<String, CartItem> cartItems = cart.getCartItems(); cart.setTotal(cart.getTotal()-cartItems.get(pid).getSubtotal()); cartItems.remove(pid); } session.setAttribute("cart", cart); response.sendRedirect(request.getContextPath()+"/cart.jsp"); } public void addProductToCart(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(); String pid = request.getParameter("pid"); String buyNumStr = request.getParameter("buyNum"); int buyNum = Integer.parseInt(buyNumStr); ProductService service = new ProductService(); Product product = service.findProductByPid(pid); double subtotal = buyNum*product.getShop_price(); CartItem cartItem = new CartItem(); cartItem.setBuyNum(buyNum); cartItem.setProduct(product); cartItem.setSubtotal(subtotal); Cart cart = (Cart) session.getAttribute("cart"); if(cart==null){ cart=new Cart(); } Map<String, CartItem> cartItems = cart.getCartItems(); double newsubtotal = 0.0; if(cartItems.containsKey(pid)){ //取出原有商品的数量 CartItem item = cartItems.get(pid); int oldBuyNum = item.getBuyNum(); oldBuyNum+=buyNum; item.setBuyNum(oldBuyNum); cart.setCartItems(cartItems); //修改小计 //原来该商品的小计 double oldsubtotal = item.getSubtotal(); //新买的商品的小计 newsubtotal = buyNum*product.getShop_price(); item.setSubtotal(oldsubtotal+newsubtotal); }else{ //如果车中没有该商品 cart.getCartItems().put(product.getPid(), cartItem); newsubtotal = buyNum*product.getShop_price(); } //计算总计 double total = cart.getTotal()+newsubtotal; cart.setTotal(total); //将车再次访问session session.setAttribute("cart", cart); // request.getRequestDispatcher("/cart.jsp").forward(request, response); response.sendRedirect(request.getContextPath()+"/cart.jsp"); } public void category(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ProductService service = new ProductService(); List<Category> cetegory = service.getCategory(); response.setContentType("text/html;charset=UTF-8"); Gson gson = new Gson(); String categoryList = gson.toJson(cetegory); // System.out.println(categoryList); response.getWriter().write(categoryList); } public void index(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ProductService service = new ProductService(); // List<Category> cetegory = service.getCategory(); List<Product> hotProduct = service.getHotProduct(); List<Product> newProduct = service.getNewProduct(); request.setAttribute("hotProductList", hotProduct); request.setAttribute("newProductList", newProduct); request.getRequestDispatcher("/index.jsp").forward(request, response); } public void productListByCid(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String currentPageString = request.getParameter("currentPage"); if(currentPageString==null){ currentPageString="1"; } int currentPage = Integer.parseInt(currentPageString); int currentCount =12; String cid = request.getParameter("cid"); ProductService service = new ProductService(); PageBean pageBean = service.getProductListByCid(cid,currentCount,currentPage); request.setAttribute("pageBean", pageBean); request.setAttribute("cid", cid); List<Product> historyProductList = new ArrayList<Product>(); Cookie[] cookies = request.getCookies(); if(cookies!=null){ for(Cookie cookie:cookies){ if("pids".equals(cookie.getName())){ String pids = cookie.getValue(); String[] split = pids.split("-"); for(String pid:split){ Product pro = service.findProductByPid(pid); historyProductList.add(pro); } } } } request.setAttribute("historyProductList", historyProductList); request.getRequestDispatcher("/product_list.jsp").forward(request, response); } public void findProductByPid(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String pid = request.getParameter("pid"); String cid = request.getParameter("cid"); String currentPage = request.getParameter("currentPage"); ProductService service = new ProductService(); Product product = service .findProductByPid(pid); request.setAttribute("product", product); request.setAttribute("cid", cid); request.setAttribute("currentPage", currentPage); String pids = pid; Cookie[] cookies = request.getCookies(); if(cookies!=null){ for(Cookie cookie:cookies){ if("pids".equals(cookie.getName())){ pids = cookie.getValue(); String[] split = pids.split("-"); List<String> asList = Arrays.asList(split); LinkedList<String> list = new LinkedList<String>(asList); if(list.contains(pid)){ list.remove(pid); } list.addFirst(pid); StringBuffer sb = new StringBuffer(); for(int i=0;i<list.size()& i<7;i++){ sb.append(list.get(i)); sb.append("-"); } pids = sb.substring(0, sb.length()-1); } } } Cookie cookie_new = new Cookie("pids", pids); response.addCookie(cookie_new); request.getRequestDispatcher("/product_info.jsp").forward(request, response); } }