设计模式-装饰者模式

装饰者模式：

在不改变原有对象的基础上，将功能附加到对象上

/**
 * 装饰者模式
 */
public class decoratorTest {
    public static void main(String[] args) {
        Component component = new ConcreteDecorator2(new ConcreteDecorator1(new concreteComponent()));
        component.operation();
    }
}

interface Component{
    void operation();
}

class concreteComponent implements Component{
    @Override
    public void operation() {
        System.out.println("拍照..");
    }
}

abstract class Decorator implements Component{
    Component component;

    public Decorator(Component component) {
        this.component = component;
    }
}

class ConcreteDecorator1 extends Decorator{

    public ConcreteDecorator1(Component component) {
        super(component);
    }

    @Override
    public void operation() {
        System.out.println("添加美颜..");
        component.operation();
    }
}

class ConcreteDecorator2 extends Decorator{

    public ConcreteDecorator2(Component component) {
        super(component);
    }

    @Override
    public void operation() {
        System.out.println("添加滤镜..");
        component.operation();
    }
}