设计模式学习—18桥接模式

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桥接模式

UML

解释说明

• 桥接模式：将抽象部分与它的实现部分分离，使它们都可以独立的变化。

代码实现

• Implementor.class

package learn18;

public abstract class Implementor {
    public abstract void operation();
}

• ConcreteImplementorA.class

package learn18;

public class ConcreteImplementorA extends Implementor {
    @Override
    public void operation() {
        System.out.println("执行方法A!");
    }
}

• ConcreteImplementorB.class

package learn18;

public class ConcreteImplementorB extends Implementor {
    @Override
    public void operation() {
        System.out.println("执行方法B!");
    }
}

• Abstraction.class

package learn18;

public abstract class Abstraction {
    protected Implementor implementor;

    public void setImplementor(Implementor implementor) {
        this.implementor = implementor;
    }

    public abstract void option();
}

• RefinedAbstraction.class

package learn18;

public class RefinedAbstraction extends Abstraction {
    @Override
    public void option() {
        implementor.operation();
    }
}

• Main.class

import learn18.*;

public class Main {

    public static void main(String[] args) throws Exception {
        Abstraction a = new RefinedAbstraction();
        a.setImplementor(new ConcreteImplementorA());
        a.option();

        Abstraction b = new RefinedAbstraction();
        b.setImplementor(new ConcreteImplementorB());
        b.option();
    }
}

参考资料

• 大话设计模式