标签:style blog ar color sp java div art log
购物项CartItem.java
1 package zyz.shop.cart; 2 3 import zyz.shop.product.Product; 4 5 public class CartItem { 6 private Product product;//商品(不采用productId,而采用对象以便更好地封装) 7 private int count;//数量 8 9 public Product getProduct() { 10 return product; 11 } 12 13 public void setProduct(Product product) { 14 this.product = product; 15 } 16 17 public int getCount() { 18 return count; 19 } 20 21 public void setCount(int count) { 22 this.count = count; 23 } 24 }
购物车Cart.java
1 package zyz.shop.cart; 2 3 import java.util.ArrayList; 4 import java.util.Iterator; 5 import java.util.List; 6 7 public class Cart { 8 List<CartItem> items = new ArrayList<CartItem>();//所有购物项 9 10 public List<CartItem> getItems() { 11 return items; 12 } 13 14 public void setItems(List<CartItem> items) { 15 this.items = items; 16 } 17 //添加购物项ci到购物车 18 public void add(CartItem ci) { 19 Iterator<CartItem> it=items.iterator(); 20 while(it.hasNext()){//如果购物车中有此商品,则该购物项的数量加1 21 CartItem item=it.next(); 22 if(item.getProduct().getPid()==ci.getProduct().getPid()){ 23 item.setCount(item.getCount()+1); 24 return; 25 } 26 } 27 items.add(ci);//如果没有此商品,则将该购物项添加购物车 28 } 29 //计算购物车的总价钱 30 public double getTotalPrice() { 31 double s=0.0; 32 Iterator<CartItem> it=items.iterator(); 33 while(it.hasNext()){ 34 CartItem item=it.next(); 35 s+=item.getProduct().getPrice()*item.getCount();//价格*数量累加 36 } 37 return s; 38 } 39 //删除指定的购物项 40 public void deleteCartItemById(int productId) { 41 Iterator<CartItem> it=items.iterator(); 42 while(it.hasNext()){ 43 CartItem item=it.next(); 44 if(item.getProduct().getPid()==productId){//如果有此商品,则从购物车中移除 45 it.remove(); 46 } 47 } 48 } 49 }
标签:style blog ar color sp java div art log
原文地址:http://www.cnblogs.com/beast-king/p/4142090.html