Bridge 设计模式

Bridge模式：将抽象和行为划分开来,各自独立,但能动态的结合。

 

public abstract class Coffee{
 CoffeeImp coffeeImp;

 public void setCoffeeImp(){
     this.coffeeImp=CoffeeImpSingleton.getTheCoffeeImp();
 }
 public CoffeeImp getCoffeeImp(){
    return this.coffeeImp;
 }
 public abstract void pourCoffee();
}

 

public abstract class CoffeeImp{
 public abstract void pourCoffeeImp();
}

 

public class CoffeeImpSingleton{
 private static CoffeeImp coffeeImp;

 public CoffeeImpSingleton(CoffeeImp coffeeImpIn)
 {this.coffeeImp = coffeeImpIn;}

  public static CoffeeImp getTheCoffeeImp(){
   return coffeeImp;
  }
}

 

public class FragrantCoffeeImp extends CoffeeImp{
 FragrantCoffeeImp(){
  System.out.println("普通Coffee");
 }

  public void pourCoffeeImp(){
   System.out.println("什么也没加，清香");
  }
}

 

public class MilkCoffeeImp extends CoffeeImp{
 MilkCoffeeImp(){
  System.out.println("牛奶Coffee");
 }

  public void pourCoffeeImp(){
   System.out.println("加了美味的牛奶");
  }
}

public class MediumCoffee extends Coffee{
 public MediumCoffee(){
  setCoffeeImp();
 }

  public void pourCoffee(){
   System.out.println("中杯");
   CoffeeImp coffeeImp=this.getCoffeeImp();
   coffeeImp.pourCoffeeImp();
  }
}

 

public class SuperSizeCoffee extends Coffee{
 public SuperSizeCoffee(){this.setCoffeeImp();}
  
  public void pourCoffee(){
   System.out.println("大杯");
   CoffeeImp coffeeImp=this.getCoffeeImp();
   coffeeImp.pourCoffeeImp();
  }
}

 

public class Test {

 public static void main(String[] args) {
  //拿出牛奶
  CoffeeImpSingleton coffeeImpSingleton = new CoffeeImpSingleton(new MilkCoffeeImp());

  //中杯加奶
  MediumCoffee mediumCoffee = new MediumCoffee();
  mediumCoffee.pourCoffee();

  //大杯加奶
  SuperSizeCoffee superSizeCoffee = new SuperSizeCoffee();
  superSizeCoffee.pourCoffee();
 }
}