建造者模式(例子)

根据上述要求来用建造者模式设计程序。我将程序放在了https://github.com/RoyalBob/Builder-Mode-Practice.git 欢迎访问。

以下是本程序的UML图以及代码：

1、创建一个创造套餐的建造者接口IMealBuilder

1 public interface IMealBuilder {
2 
3     public void BuildBurger();
4     public void BuildChips();
5     public void BuildDrink();
6     Meal GetMeal();
7 }

2、编写Meal类用来存放建造者需要建造的食物。

 1 public class Meal
 2 {
 3     private  List<IFood> foodList=new ArrayList<IFood>();
 4     public void addFood( IFood food )
 5     {
 6         foodList.add(food);
 7     }
 8     public void Show()
 9     {
10         for (int i=0; i<foodList.size(); i++)
11         {
12             foodList.get(i).Make();
13         }
14     } 
15 }

3、分别创建肯德基、麦当劳两家店的建造者KFCBuilder、McDonaldBuilder，这两家店都有相似套餐：汉堡+薯条+饮料，但是产品不同。所以都继承同样的建造过程IMealBuilder

以下是肯德基的建造者KFCBuilder：

 1 public class KFCBuilder implements IMealBuilder
 2 {
 3     protected Meal meal=new Meal();
 4     @Override
 5     public void BuildBurger() {
 6         // TODO Auto-generated method stub
 7         IFood food = new KFCBurger();
 8         meal.addFood(food);
 9     }
10 
11     @Override
12     public void BuildChips() {
13         // TODO Auto-generated method stub
14         IFood food = new KFCChips();
15         meal.addFood(food);
16     }
17 
18     @Override
19     public void BuildDrink() {
20         // TODO Auto-generated method stub
21         IFood food = new KFCDrink();
22         meal.addFood(food);
23     }
24 
25     @Override
26     public Meal GetMeal() {
27         // TODO Auto-generated method stub
28         return meal;
29     }
30 }

以下是麦当劳的建造者McDonaldBuilder：

 1 public class McDonaldBuilder implements IMealBuilder{
 2 
 3     protected Meal meal=new Meal();
 4     @Override
 5     public void BuildBurger() {
 6         // TODO Auto-generated method stub
 7         IFood food = new McDonaldBurger();
 8         meal.addFood(food);
 9     }
10 
11     @Override
12     public void BuildChips() {
13         // TODO Auto-generated method stub
14         IFood food = new McDonaldChips();
15         meal.addFood(food);
16     }
17 
18     @Override
19     public void BuildDrink() {
20         // TODO Auto-generated method stub
21         IFood food = new McDonaldDrink();
22         meal.addFood(food);
23     }
24 
25     @Override
26     public Meal GetMeal() {
27         // TODO Auto-generated method stub
28         return meal;
29     }
30 }

4、创建一个指挥者MealDirector用来负责控制产品的创建过程。

 1 public class MealDirector{
 2     
 3     private IMealBuilder _builder;
 4     public MealDirector( IMealBuilder builder )
 5     {
 6         _builder = builder;
 7     }
 8     public Meal CreateMeal()
 9     {
10         _builder.BuildBurger();
11         _builder.BuildChips();
12         _builder.BuildDrink();
13         
14         return _builder.GetMeal(); 
15     }
16 }

5、创建一个食物的接口IFood，具有制作食物的方法Make()。

1 public interface IFood{
2    
3     public abstract void Make();
4 }

6、分别编写肯德基、麦当劳各种食品的制作方法，以输出为反馈。

1 public class KFCBurger implements IFood {
2 
3     @Override
4     public void Make() {
5         // TODO Auto-generated method stub
6         System.out.println("KFC汉堡做好了！");        
7     }
8     
9 }

KFCBurger

1 public class KFCChips implements IFood {
2 
3     @Override
4     public void Make() {
5         // TODO Auto-generated method stub
6         System.out.println("KFC薯条做好了！");
7     }
8 
9 }

KFCChips

1 public class KFCDrink implements IFood {
2 
3     @Override
4     public void Make() {
5         // TODO Auto-generated method stub
6         System.out.println("KFC饮料做好了！");
7     }
8 
9 }

KFCDrink

1 public class McDonaldBurger implements IFood {
2 
3     @Override
4     public void Make() {
5         // TODO Auto-generated method stub
6         System.out.println("McDonald汉堡做好了！");
7     }
8 
9 }

McDonaldBurger

1 public class McDonaldChips implements IFood {
2 
3     @Override
4     public void Make() {
5         // TODO Auto-generated method stub
6         System.out.println("McDonald薯条做好了！");
7     }
8 
9 }

McDonaldChips

1 public class McDonaldDrink implements IFood {
2 
3     @Override
4     public void Make() {
5         // TODO Auto-generated method stub
6         System.out.println("McDonald饮料做好了！");
7     }
8 
9 }

McDonaldDrink

7、书写主函数Main来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。

 1 public class Main {
 2 
 3     public static void main(String[] args) {
 4         // TODO Auto-generated method stub
 5         IMealBuilder builder1 = new KFCBuilder();
 6         MealDirector director1 = new MealDirector(builder1);
 7         director1.CreateMeal().Show();;
 8 
 9         IMealBuilder builder2 = new McDonaldBuilder();
10         MealDirector director2 = new MealDirector(builder2);
11         director2.CreateMeal().Show();
12     }
13 
14 }

输出结果看是否符合要求：