cart.java

利用javaEE开发而实现图书的购买的一个系统

package org.yangkang.bookshop.util;

import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;

import org.yangkang.bookshop.dao.BaseDao;
import org.yangkang.bookshop.vo.Orderitem;

public class Cart extends BaseDao{	
	@SuppressWarnings("unchecked")
	private HashMap<Integer,Orderitem> item;
	private int total_price;
	
	public HashMap<Integer, Orderitem> getItem() {
		return item;
	}

	public void setItem(HashMap<Integer, Orderitem> item) {
		this.item = item;
	}

	public int getTotal_price() {
		return total_price;
	}

	public void setTotal_price(int total_price) {
		this.total_price = total_price;
	}

	
	public Cart(){
		if(item==null){
			item = new HashMap<Integer,Orderitem>();
		}		
	}
	
	public void addToCart(Integer bookId,Orderitem orderitem){
		if(item.containsKey(bookId)){
			Integer or_quantity = orderitem.getQuantity();
			Orderitem _orderitem = item.get(bookId);
			orderitem.setQuantity(_orderitem.getQuantity().intValue()+or_quantity.intValue());
			item.put(bookId, orderitem);
			total_price = getAllprice();
		}
		else{			
			item.put(bookId, orderitem);
			total_price = getAllprice();
		}		
	}
	
	public boolean update(Integer bookId,Orderitem orderitem,int quantity){
		Integer _bookId = orderitem.getBook().getBookId();
		if(bookId.intValue()==_bookId.intValue()){
			if(quantity<=orderitem.getBook().getQuantity().intValue()){
				orderitem.setQuantity(quantity);
				item.put(bookId, orderitem);
				total_price = getAllprice();
				return true;
			}
			else
				return false;
		}
		return false;
	}
	
	@SuppressWarnings("unchecked")
	public int getAllprice(){
		Collection<Orderitem> items = item.values();
		Iterator it = items.iterator();
		int allPrice = 0;
		while(it.hasNext()){
			Orderitem _orderitem = (Orderitem) it.next();
			int price = _orderitem.getBook().getPrice().intValue();
			int quantity = _orderitem.getQuantity().intValue();
			allPrice += price*quantity;
		}
		return allPrice;
	
	}
	
//	public ArrayList<Orderitem> AddToCart(Orderitem orderitem){
//		Session session = getSession();
//		try{	
//			Book book = orderitem.getBook();		
//			int quantity_1 = book.getQuantity();
//			int quantity_2 = orderitem.getQuantity();
////			Order order = orderitem.getOrder();
////			String hql = "from Orderitem or where or.order.orderId=?";		
//			quantity_1 = quantity_1-quantity_2;
//			book.setQuantity(quantity_1);			
////			Query query = session.createQuery(hql);
////			query.setParameter(0, order.getOrderId());
////			ArrayList<Orderitem> orditm = (ArrayList)query.list();		
//			Transaction tx = session.beginTransaction();
//			session.update(book);
//			tx.commit();
////			return orditm;
//		}
//		catch(Exception e){
//			session.close();
//			e.printStackTrace();			
//			return null;
//		}
//		
//	}

	
}