设计模式之--装饰器

1 public interface Component {
2 
3     void operation();
4 }

1 public class ConcreteComponent implements Component {
2 
3     @Override
4     public void operation() {
5         System.out.println("具体操作的对象");
6     }
7 }

 1 public class Decorator implements Component {
 2 
 3     protected Component component;
 4 
 5     public void setComponent(Component component) {
 6         this.component = component;
 7     }
 8 
 9     public Component getComponent() {
10         return component;
11     }
12 
13     @Override
14     public void operation() {
15         if (null != component) {
16             component.operation();
17         }
18     }
19 }

1 public class ConcreteDecoratorA extends Decorator {
2 
3     @Override
4     public void operation() {
5         super.operation();
6         System.out.println("A操作装饰");
7     }
8 }

1 public class ConcreteDecoratorB extends Decorator {
2 
3     @Override
4     public void operation() {
5         super.operation();
6         System.out.println("装饰器B进行操作");
7     }
8 }