cart.java

自己刚刚学习MVC时编写的

package com.Bean;

import java.util.Vector;

/**
 * @author lynn
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class Cart {
	Vector cart = new Vector();
	/**
	 * @return Returns the cart.
	 */
	public Vector getCart() {
		return cart;
	}
	/**
	 * @param cart The cart to set.
	 */
	public void setCart(Vector cart) {
		this.cart = cart;
	}
	
	public void addItem(Book book)
	{
		cart.add(book);
	}
	
	public void deleteItem(Book book)
	{
		for (int i=0;i<cart.size();i++)
		{
			if(book.getId().equals(((Book)cart.get(i)).getId()))
			{
				cart.remove(i);
				break;
			}
		}
	}
	
	public void deleteItem(String id)
	{
		for (int i=0;i<cart.size();i++)
		{
			if(id.equals(((Book)cart.get(i)).getId()))
			{
				cart.remove(i);
				break;
			}
		}
	}
	
	public Book getItem(String id)
	{
		for (int i=0;i<cart.size();i++)
		{
			if(id.equals(((Book)cart.get(i)).getId()))
			{
				return (Book)cart.get(i);
			}
		}
		return null;
	}
	
	public Book getItem(int i)
	{
		if(i<cart.size())
		{
			return (Book)cart.get(i);
		}
		return null;
	}
	
	public int size()
	{
		return cart.size();
	}
}