门面模式

一、门面模式说明：

门面模式的特点是：客户端不直接访问系统内部一些复杂的内部类，而通过访问门面来达到操控这些类的目的。门面模式与这些类之间存在聚合关系。可以用如下结构图描述：

 

二、Java语言描述：

package com.solid.pattern;

/**

 * 门面模式

 * @author solid

 */

public class Facade {

   

    private Ring ring;

    private Clarm clarm;

    private Light light;

   

    public Facade(Ring ring, Clarm clarm, Light light) {

       this.ring = ring;

       this.clarm = clarm;

       this.light = light;

    }

   

    public void open() {

       light.turnOn();

       ring.turnOn();

       clarm.turnOn();

    }

   

    public void close() {

       light.turnOff();

       ring.turnOff();

       clarm.turnOff();

    }

}

 

package com.solid.pattern;

 

public class Light {

 

    public void turnOn() {

       System.out.println("===light turnOn===");

    }

   

    public void turnOff() {

       System.out.println("===light turnOff===");

    }

}

 

package com.solid.pattern;

 

public class Ring {

 

    public void turnOn() {

       System.out.println("===ring turnOn===");

    }

   

    public void turnOff() {

       System.out.println("===ring turnOff===");

    }

}

 

package com.solid.pattern;

 

public class Clarm {

 

    public void turnOn() {

       System.out.println("===clarm turnOn===");

    }

   

    public void turnOff() {

       System.out.println("===clarm turnOff===");

    }

}

 

package com.solid.pattern;

/**

 * 门面模式测试方法

 * @author solid

 */

public class TestFacade {

 

    private static Ring ring;

    private static Light light;

    private static Clarm clarm;

    public static void main(String[] args) {

       ring = new Ring();

       light = new Light();

       clarm = new Clarm();

       Facade facade = new Facade(ring, clarm, light);

       facade.open();

       facade.close();

    }

}