山寨版当当网 struts+hibernate

package org.whatisjava.dang.service; import java.io.Serializable; import java.io.UnsupportedEncodingException; import java.net.URLDecoder; import java.net.URLEncoder; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.HashMap; import java.util.Iterator; import java.util.List; import org.apache.log4j.Logger; import org.whatisjava.dang.dao.DaoFactory; import org.whatisjava.dang.dao.ProductDao; import org.whatisjava.dang.domain.CartItem; import org.whatisjava.dang.domain.Product; import org.whatisjava.dang.domain.User; import org.whatisjava.dang.util.DaoException; public class CartService implements Serializable { private static final long serialVersionUID = 1L; private ProductDao productDao = DaoFactory.getProductDao(); private static Logger logger = Logger.getLogger(CartService.class); private User user; private HashMap<Integer, CartItem> items; /** * * @param user */ public CartService(User user) { logger.debug(user.getNickname()); this.user = user; this.items = new HashMap<Integer, CartItem>(); } public User getUser() { return user; } /** * * @param product * @return */ public boolean addItem(Integer productId) throws DaoException { if (!items.containsKey(productId)) { CartItem item = new CartItem(); Product product = productDao.getProduct(productId); item.setProduct(product); item.setNumber(1); item.setDrop(false); items.put(product.getId(), item); logger.debug(items); return true; } return false; } /** * * @param productId * @param num * @return */ public boolean updateNum(Integer productId, int num) { if (items.containsKey(productId)) { CartItem item = items.get(productId); item.setNumber(num); return true; } return false; } /** * * @param productId * @return */ public boolean drop(Integer productId) { if (items.containsKey(productId)) { CartItem item = items.get(productId); item.setDrop(true); return true; } return false; } /** * * @param productId * @return */ public boolean recovery(Integer productId) { if (items.containsKey(productId)) { CartItem item = items.get(productId); item.setDrop(false); return true; } return false; } public void clear() { items.clear(); } /** * * @return * @throws UnsupportedEncodingException */ public String serialize() throws UnsupportedEncodingException { StringBuilder buffer = new StringBuilder(); buffer.append(user.getId()).append("@"); if (items.isEmpty()) buffer.append("0"); Iterator<Integer> it = items.keySet().iterator(); while (it.hasNext()) { Integer id = it.next(); int num = items.get(id).getNumber(); boolean drop = items.get(id).isDrop(); buffer.append(id + "," + num + "," + drop); buffer.append(";"); } if (buffer.length() > 0) buffer.deleteCharAt(buffer.length() - 1); logger.debug(buffer); return buffer.toString(); } /** * * @param content * @throws DaoException * @throws UnsupportedEncodingException */ public void load(String content) throws DaoException, UnsupportedEncodingException { items.clear(); String userId = content.substring(0, content.indexOf("@")); if (userId != null && Integer.parseInt(userId) == user.getId()) { content = content.substring(content.indexOf("@") + 1); if (content == null || "0".equals(content)) return; if (content != null && content.length() > 0) { String[] itemsArry = content.split(";"); for (int i = 0; i < itemsArry.length; i++) { String[] itemArry = itemsArry[i].split(","); logger.debug(Arrays.toString(itemArry)); Integer id = Integer.valueOf(itemArry[0]); int number = Integer.parseInt(itemArry[1]); boolean drop = Boolean.parseBoolean(itemArry[2]); Product product = productDao.getProduct(id); CartItem item = new CartItem(); item.setProduct(product); item.setNumber(number); item.setDrop(drop); items.put(product.getId(), item); logger.debug(items); } } } } /** * * @return */ public boolean isEmpty() { return items.isEmpty(); } /** * * @return */ public List<CartItem> getItems() { ArrayList<CartItem> list = new ArrayList<CartItem>(); Iterator<Integer> it = items.keySet().iterator(); while (it.hasNext()) { CartItem item = items.get(it.next()); if (!item.isDrop()) { list.add(item); } } Collections.sort(list); return list; } /** * * @return */ public List<CartItem> getDropItems() { ArrayList<CartItem> list = new ArrayList<CartItem>(); Iterator<Integer> it = items.keySet().iterator(); while (it.hasNext()) { CartItem item = items.get(it.next()); if (item.isDrop()) { list.add(item); } } Collections.sort(list); return list; } public double getTotalPrice() { double totalPrice = 0; Iterator<Integer> it = items.keySet().iterator(); while (it.hasNext()) { CartItem item = items.get(it.next()); if (!item.isDrop()) { totalPrice += item.getProduct().getFixedPrice() * item.getNumber(); } } return totalPrice; } public double getDangPrice() { double totalPrice = 0; Iterator<Integer> it = items.keySet().iterator(); while (it.hasNext()) { CartItem item = items.get(it.next()); if (!item.isDrop()) { totalPrice += item.getProduct().getDangPrice() * item.getNumber(); } } return totalPrice; } }