建造者模式

public interface IMealBuilder
{
public void BuildBurger();
public void BuildChips();
public void BuildDrink();
Meal GetMeal();
}//首先先创建一个建造者接口IMealBuilder来创建套餐

public class Meal
{
private  List<IFood> foodList=new ArrayList<IFood>();
public void addFood( IFood food )
{
foodList.add(food);
}
public void Show()
{
for (int i=0; i<foodList.size(); i++)
{
foodList.get(i).Make();
}
}
}//用Meal类存放建造者需要建造的食物

public class KFCBuilder implements IMealBuilder
{
protected Meal meal=new Meal();
public void BuildBurger()
{
IFood food = new KFCBurger();
meal.addFood(food);
}

public void BuildChips()
{
IFood food = new KFCChips();
meal.addFood(food);
}

public void BuildDrink()
{
IFood food = new KFCDrink();
meal.addFood(food);
}

public Meal GetMeal()
{
return meal;
}
}//肯德基建造者KFCBuilder继承的建造过程IMealBuilder

public class McDonaldBuilder implements IMealBuilder
{

protected Meal meal=new Meal();
public void BuildBurger()
{
IFood food = new McDonaldBurger();
meal.addFood(food);
}

public void BuildChips()
{
IFood food = new McDonaldChips();
meal.addFood(food);
}

public void BuildDrink()
{
IFood food = new McDonaldDrink();
meal.addFood(food);
}

public Meal GetMeal()
{
return meal;
}
}//麦当劳建造者McDonaldBuilder继承的建造过程IMealBuilder

public class MealDirector
{
private IMealBuilder _builder;
public MealDirector( IMealBuilder builder )
{
_builder = builder;
}
public Meal CreateMeal()
{
_builder.BuildBurger();
_builder.BuildChips();
_builder.BuildDrink();

return _builder.GetMeal();
}
}//创建一个指挥者MealDirector负责控制产品创建

public interface IFood
{
public abstract void Make();
}//创建一个食物的接口IFood，具有制作食物的方法Make()

public class KFCBurger implements IFood
{
public void Make()
{
System.out.println("KFC汉堡做好了！");
}
}//肯德基各种食品的制作方法。

public class KFCChips implements IFood
{
public void Make()
{
System.out.println("KFC薯条做好了！");
}
}//KFCChips

public class KFCDrink implements IFood
{
public void Make()
{
System.out.println("KFC饮料做好了！");
}
}//KFCDrink

public class McDonaldBurger implements IFood
{
public void Make()
{
System.out.println("McDonald汉堡做好了！");
}
}//麦当劳各种食品的制作方法

public class McDonaldChips implements IFood
{
public void Make()
{
System.out.println("McDonald薯条做好了！");
}
}//McDonaldChips

public class McDonaldDrink implements IFood
{
public void Make()
{
System.out.println("McDonald饮料做好了！");
}
}//McDonaldDrink

public class Main
{

public static void main(String[] args)
{

IMealBuilder builder1 = new KFCBuilder();
MealDirector director1 = new MealDirector(builder1);
director1.CreateMeal().Show();;

IMealBuilder builder2 = new McDonaldBuilder();
MealDirector director2 = new MealDirector(builder2);
director2.CreateMeal().Show();
}

}//主函数Main分别创建肯德基和麦当劳的建造者和指挥者，来制作各自的套餐