jsp+hibernate实现的购物车系统

package com.tarena.wangkai.shoppingCart.action; import java.io.IOException; import java.io.PrintWriter; import java.util.Collection; import java.util.HashMap; import java.util.HashSet; import java.util.Set; import javax.servlet.RequestDispatcher; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import com.tarena.wangkai.shoppingCart.action.token.TokenUtil; import com.tarena.wangkai.shoppingCart.entity.Cart; import com.tarena.wangkai.shoppingCart.entity.Item; import com.tarena.wangkai.shoppingCart.entity.Order; import com.tarena.wangkai.shoppingCart.entity.Product; import com.tarena.wangkai.shoppingCart.entity.User; import com.tarena.wangkai.shoppingCart.service.ShoppingCartService; import com.tarena.wangkai.shoppingCart.util.StringUtil; /** * * @author wangkai * */ public class ActionServlet extends HttpServlet { private static final long serialVersionUID = -7762641632538749621L; private ShoppingCartService service; public void init() throws ServletException { this.service = new ShoppingCartService(); } public void execute(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String path = req.getServletPath(); path = path.substring(0, path.indexOf(".")); req.setCharacterEncoding("utf8"); resp.setContentType("text/html;charset=utf8"); if (path.equals("/login")) { // String targetURI = req.getParameter("targetURI").trim(); if (targetURI == null || targetURI.equals("") || targetURI.equals("null")) { targetURI = "/myShoppingCart.jsp"; } this.doLogin(req, resp, targetURI); } else if (path.equals("/listProducts")) { // this.listProducts(req, resp, "/productsList.jsp"); } else if (path.equals("/generateOrder")) { // this.generateOrder(req, resp, "businessMessage.jsp"); } else if (path.equals("/checkUserName")) { String userName = StringUtil.codeToUTF(req.getParameter("userName").trim()); if (checkUserName(userName)) { PrintWriter out = resp.getWriter(); out.print("inuse"); } } else if (path.equals("/regeditUser")) { if (TokenUtil.isTokenValid(req)) { if (regeditUser(req, resp)) { resp.sendRedirect(req.getContextPath()); }else{ resp.sendRedirect(req.getContextPath() + "/regedit.jsp"); } } else { resp.sendRedirect(req.getContextPath() + "/regedit.jsp"); } }else if(path.equals("/myOrders")){ this.getUserOrders(req, resp, "myOrders.jsp"); } } private void getUserOrders(HttpServletRequest req, HttpServletResponse resp,String forwardPage){ HttpSession session=req.getSession(false); if(session!=null && session.getAttribute("user")!=null){ User user=(User)session.getAttribute("user"); Collection<Order> userOrders=null; if((userOrders=service.getUserOrders(user)).size()>0){ req.setAttribute("userOrders", userOrders); this.forward(req, resp, forwardPage); } } } private boolean regeditUser(HttpServletRequest req, HttpServletResponse resp) { boolean state = false; String userName = req.getParameter("username").trim(); String passWord = req.getParameter("password"); String address = req.getParameter("address"); String postCode = req.getParameter("postcode"); String email = req.getParameter("email"); String homePhone = req.getParameter("homephone"); String cellPhone = req.getParameter("cellphone"); String officePhone = req.getParameter("officephone"); if(userName==null || userName.equals("")||userName.equals("null")||passWord==null || passWord.equals("")||passWord.equals("null")){ return false; }else{ User user = new User(); user.setName(userName); user.setPassword(passWord); user.setAddress(address); user.setPostCode(postCode); user.setEmail(email); user.setHomePhone(homePhone); user.setCellPhone(cellPhone); user.setOfficePhone(officePhone); if (service.regeditUser(user)) { HttpSession session = req.getSession(); session.setAttribute("user", user); state = true; } } return state; } /** * check if the userName has been used; * @param userName * @return */ private boolean checkUserName(String userName) { return service.checkUserName(userName); } /** * * @param req * @param resp * @param forwardPage */ private void doLogin(HttpServletRequest req, HttpServletResponse resp, String forwardPage) { String userName = req.getParameter("userName").trim(); String passWord = req.getParameter("passWord").trim(); if (userName == null || passWord == null || userName.length() < 0 || passWord.length() < 0) { try { System.out.println("username null"); resp.sendRedirect(req.getContextPath() + "/login.jsp"); } catch (IOException e) { e.printStackTrace(); } return; } else { User u = service.login(userName, passWord); if (u != null) { HttpSession session = req.getSession(); session.setAttribute("user", u); try { resp.sendRedirect(req.getContextPath() + forwardPage); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } else { System.out.println("username not null"); forward(req, resp, "/common/error.jsp"); } } } /** * * @param req * @param resp * @param forwardPage */ private void listProducts(HttpServletRequest req, HttpServletResponse resp, String forwardPage) { Collection<Product> products = service.listProducts(); if (products != null) { ServletContext application = getServletContext(); application.setAttribute("products", products); } this.forward(req, resp, forwardPage); } /** */ private void generateOrder(HttpServletRequest req, HttpServletResponse resp, String forwardPage) { HttpSession session = req.getSession(false); if (session != null) { Cart myCart = (Cart) session.getAttribute("myCart"); User user = (User) session.getAttribute("user"); if (myCart != null && !myCart.isEmpty()) { HashMap<Product, Integer> items = myCart.getCartItem(); Set<Product> products = items.keySet(); Set<Item> orderItems = new HashSet<Item>(); Order order = new Order(); for (Product p : products) { Item item = new Item(); item.setProduct(p); item.setNumber(items.get(p)); item.setCost(p.getPrice() * items.get(p)); item.setOrder(order); orderItems.add(item); } order.setItems(orderItems); order.setStatus(-1); order.setCost(myCart.getCost()); order.setUser(user); int orderId = this.service.generateOrder(order); if (orderId != -1) { session.removeAttribute("myCart"); } req.setAttribute("orderId", orderId); this.forward(req, resp, forwardPage); } } } /** * @param forwardPage * */ private void forward(HttpServletRequest req, HttpServletResponse resp, String forwardPage) { RequestDispatcher dispatcher = req.getRequestDispatcher(forwardPage); try { dispatcher.forward(req, resp); } catch (ServletException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { this.execute(req, resp); } protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { this.execute(req, resp); } }