productbean.java

一个简易的网上书店（jsp+sqlservler+struts）。

package com.webshop.view;

import com.webshop.db.*;
import com.webshop.domain.*;
/**
 * @author w
 *
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 * Window>Preferences>Java>Templates.
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 */
public class ProductBean 
{
	private static final ProductBean instance =new ProductBean();
	
	CategoryDAO categoryDAO;
	ItemDAO itemDAO;
	ProductDAO productDAO;
	
	/**
	 * Constructor for ProductBean.
	 */
	
	private ProductBean() {	
		categoryDAO=new CategoryDAO();
		itemDAO=new ItemDAO();
		productDAO =new ProductDAO();
	
	}
	public static  ProductBean getInstance()
	{
		return instance;
	}
	/**
	 * 获得所有商品分类 
	 */
   /**
	 * 获得所有商品分类
	 */
    public java.util.Collection getAllCategory()
    {
    	return	categoryDAO.getAllCategory();
    } 
    public Product getProductById(String productId)
    {
    	return productDAO.getProductById(productId);
    }
    public java.util.Collection getItemByProductId(String productId )
    {
    	return  itemDAO.getItemByProductId(productId);
    } 
    public Item getItemById(String itemId)
    {
    	return itemDAO.getItemById(itemId)	;
    }
    
    
}