源代码-网上商城之HeimaShop-2.rar

package com.itheima.web.servlet; 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.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import com.google.gson.Gson; import com.itheima.domain.Cart; import com.itheima.domain.CartItem; import com.itheima.domain.Category; import com.itheima.domain.PageBean; import com.itheima.domain.Product; import com.itheima.service.ProductService; import com.itheima.utils.JedisPoolUtils; import redis.clients.jedis.Jedis; public class PrdocutServlet extends BaseServlet { /*public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获得请求的哪个方法的method String methodName = request.getParameter("method"); if("productList".equals(methodName)){ productList(request,response); }else if("categoryList".equals(methodName)){ categoryList(request,response); }else if("index".equals(methodName)){ index(request,response); }else if("productInfo".equals(methodName)){ productInfo(request,response); } } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doGet(request, response); } */ //清空购物车 public void clearCart(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(); session.removeAttribute("cart"); //跳转回cart.jsp response.sendRedirect(request.getContextPath()+"/cart.jsp"); } //删除单一商品 public void delProFromCart(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获得要删除的item的pid String pid = request.getParameter("pid"); //删除session中的购物车中的购物项集合中的item HttpSession session = request.getSession(); Cart cart = (Cart) session.getAttribute("cart"); if(cart!=null){ Map<String, CartItem> cartItems = cart.getCartItems(); //需要修改总价 cart.setTotal(cart.getTotal()-cartItems.get(pid).getSubtotal()); //删除 cartItems.remove(pid); cart.setCartItems(cartItems); } session.setAttribute("cart", cart); //跳转回cart.jsp response.sendRedirect(request.getContextPath()+"/cart.jsp"); } //将商品添加到购物车 public void addProductToCart(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { HttpSession session = request.getSession(); ProductService service = new ProductService(); //获得要放到购物车的商品的pid String pid = request.getParameter("pid"); //获得该商品的购买数量 int buyNum = Integer.parseInt(request.getParameter("buyNum")); //获得product对象 Product product = service.findProductByPid(pid); //计算小计 double subtotal = product.getShop_price()*buyNum; //封装CartItem CartItem item = new CartItem(); item.setProduct(product); item.setBuyNum(buyNum); item.setSubtotal(subtotal); //获得购物车---判断是否在session中已经存在购物车 Cart cart = (Cart) session.getAttribute("cart"); if(cart==null){ cart = new Cart(); } //将购物项放到车中---key是pid //先判断购物车中是否已将包含此购物项了 ----- 判断key是否已经存在 //如果购物车中已经存在该商品----将现在买的数量与原有的数量进行相加操作 Map<String, CartItem> cartItems = cart.getCartItems(); double newsubtotal = 0.0; if(cartItems.containsKey(pid)){ //取出原有商品的数量 CartItem cartItem = cartItems.get(pid); int oldBuyNum = cartItem.getBuyNum(); oldBuyNum+=buyNum; cartItem.setBuyNum(oldBuyNum); cart.setCartItems(cartItems); //修改小计 //原来该商品的小计 double oldsubtotal = cartItem.getSubtotal(); //新买的商品的小计 newsubtotal = buyNum*product.getShop_price(); cartItem.setSubtotal(oldsubtotal+newsubtotal); }else{ //如果车中没有该商品 cart.getCartItems().put(product.getPid(), item); 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); //直接跳转到购物车页面 response.sendRedirect(request.getContextPath()+"/cart.jsp"); } //显示商品的类别的的功能 public void categoryList(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ProductService service = new ProductService(); //先从缓存中查询categoryList 如果有直接使用 没有在从数据库中查询 存到缓存中 //1、获得jedis对象 连接redis数据库 Jedis jedis = JedisPoolUtils.getJedis(); String categoryListJson = jedis.get("categoryListJson"); //2、判断categoryListJson是否为空 if(categoryListJson==null){ System.out.println("缓存没有数据 查询数据库"); //准备分类数据 List<Category> categoryList = service.findAllCategory(); Gson gson = new Gson(); categoryListJson = gson.toJson(categoryList); jedis.set("categoryListJson", categoryListJson); } response.setContentType("text/html;charset=UTF-8"); response.getWriter().write(categoryListJson); } //显示首页的功能 //显示商品的类别的的功能 public void index(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ProductService service = new ProductService(); //准备热门商品---List<Product> List<Product> hotProductList = service.findHotProductList(); //准备最新商品---List<Product> List<Product> newProductList = service.findNewProductList(); //准备分类数据 //List<Category> categoryList = service.findAllCategory(); //request.setAttribute("categoryList", categoryList); request.setAttribute("hotProductList", hotProductList); request.setAttribute("newProductList", newProductList); request.getRequestDispatcher("/index.jsp").forward(request, response); } //显示商品的详细信息功能 public void productInfo(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { //获得当前页 String currentPage = request.getParameter("currentPage"); //获得商品类别 String cid = request.getParameter("cid"); //获得要查询的商品的pid String pid = request.getParameter("pid"); ProductService service = new ProductService(); Product product = service.findProductByPid(pid); request.setAttribute("product", product); request.setAttribute("currentPage", currentPage); request.setAttribute("cid", cid); //获得客户端携带cookie---获得名字是pids的cookie String pids = pid; Cookie[] cookies = request.getCookies(); if(cookies!=null){ for(Cookie cookie : cookies){ if("pids".equals(cookie.getName())){ pids = cookie.getValue(); //1-3-2 本次访问商品pid是8----->8-1-3-2 //1-3-2 本次访问商品pid是3----->3-1-2 //1-3-2 本次访问商品pid是2----->2-1-3 //将pids拆成一个数组 String[] split = pids.split("-");//{3,1,2} List<String> asList = Arrays.asList(split);//[3,1,2] LinkedList<String> list = new LinkedList<String>(asList);//[3,1,2] //判断集合中是否存在当前pid if(list.contains(pid)){ //包含当前查看商品的pid list.remove(pid); list.addFirst(pid); }else{ //不包含当前查看商品的pid �