设计模式:桥接模式(Bridge)

 桥接模式: 将实现与抽象放在两个不同的类层次中,使两个层次可以独立改变。

public abstract class Phone {
	
	private Brand brand;
	
	public Phone(Brand brand){
		this.brand = brand;
	}
	
	public void open() {
		this.brand.open();
	}

	public void close() {
		this.brand.close();
	}

	public void call() {
		this.brand.call();
	}
}

public class FoldedPhone extends Phone{

	public FoldedPhone(Brand brand) {
		super(brand);
	}
	
	public void open() {
		super.open();
		System.out.println("折叠样式");
	}

	public void close() {
		super.close();
		System.out.println("折叠样式");
	}

	public void call() {
		super.call();
		System.out.println("折叠样式");
	}
}


public interface Brand {
	void open();
	void close();
	void call();
}


public class HuaWei implements Brand{

	@Override
	public void open() {
		System.out.println("华为手机开机了");
	}

	@Override
	public void close() {
		System.out.println("华为手机关机了");
	}

	@Override
	public void call() {
		System.out.println("华为手机通话");
	}
}

public class XiaoMi implements Brand{

	@Override
	public void open() {
		System.out.println("小米手机开机了");
	}

	@Override
	public void close() {
		System.out.println("小米手机关机了");
	}

	@Override
	public void call() {
		System.out.println("小米手机通话");
	}
}

public class Client {
	public static void main(String[] args){
		XiaoMi x = new XiaoMi();
		FoldedPhone p = new FoldedPhone(x);
		p.open();
		p.call();
		p.close();
	}
}

桥接模式在jdbc中使用

   jdbc的Driver接口, 如果从桥接模式来看,Driver就是一个接口,下面可以有MySQL的Driver, Oracle的Driver, 这些就可以当做实现接口类。