cart.java

一个简单实用的网上书城,可当作原型使用

/*
 * Cart.java
 *
 * Created on 2007年7月23日, 上午9:22
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package czm;
import java.util.Iterator;
import java.sql.*;
import java.util.Hashtable;
/**
 *
 * @author Administrator
 */
public class Cart {
    private Hashtable cartitem=new Hashtable();
    /** Creates a new instance of Cart */
    public Cart() {
        
    }
    
    public Cart(Hashtable ht)
    {
        this.cartitem=ht;
    }
    
    public void DeleteCart(String isbn) //
    {
        cartitem.remove(isbn);
    }
    
     public void AddBookToCart(String isbn,int count)
    {
        cartitem.put(isbn,Integer.valueOf(count));
    }
    
    public void EditCart(String isbn,int count)
    {
        cartitem.put(isbn,Integer.valueOf(count));
    }
    
    public float getAccount()
    {
        Iterator it=cartitem.keySet().iterator();   
        float tmpresult=0f;
        while(it.hasNext()){
            String itemisbn=(String)it.next();    //取得HASHTABL键值对
            BookBean bookinfo=new BookBean();;
            bookinfo.setBookISBN(itemisbn);
            float itemprice=Float.parseFloat(bookinfo.getPrice());
            Integer itemCount=(Integer)cartitem.get(itemisbn);                      //购造SQL语句
            int itemcount=itemCount.intValue();
            tmpresult+=itemprice*itemcount;
        }
        return tmpresult;
    }
    
    
    public java.util.Hashtable getBooks()
    {
        return cartitem;
    }
}