cartitembean.java

网上购物系统

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

public class CartItemBean 
{
  HashMap hm=new HashMap();
  public void AddItem(String id,String c, CartItem ci)
  {
    if (hm.containsKey(id))
    {
      CartItem temp=(CartItem)hm.get(id);
      int a1=Integer.parseInt(c);
      int a=Integer.parseInt(temp.getNum())+a1;
      temp.setNum(String.valueOf(a));
      String s=temp.getCost();
      double m=Double.parseDouble(s);
      String l=ci.getCost();
      double n=Double.parseDouble(l);
      
      double b=m+n;
      temp.setCost(String.valueOf(b));
    }
    else
    {
      hm.put(id,ci);
    }
  }

  public void RemoveItem(String id)
  {
    if (hm.containsKey(id))
    {
      hm.remove(id);
    }
  }

  public Collection getAllItem()
  {
    return hm.values();
  }
  
  public int AllCount()
  {
    return hm.values().size();
  }
  
  public double AllSum()
  {
    Collection cn=hm.values();
    Iterator it=cn.iterator();
    double sum=0.0;
    while(it.hasNext())
    {
      CartItem ci=(CartItem)it.next();
      sum=sum+Double.parseDouble(ci.getCost());
    }
    return sum;
  }
}