java学习笔记-设计模式11(桥接模式)

意图

　　将抽象化与实现化解耦，使得二者可以独立变化

public interface Sourceable {  
    public void method();  
} 

public class SourceSub1 implements Sourceable {  
  
    @Override  
    public void method() {  
        System.out.println("this is the first sub!");  
    }  
} 

public class SourceSub2 implements Sourceable {  
  
    @Override  
    public void method() {  
        System.out.println("this is the second sub!");  
    }  
}  

　　定义一个桥

public abstract class Bridge {  
    private Sourceable source;  
  
    public void method(){  
        source.method();  
    }  
      
    public Sourceable getSource() {  
        return source;  
    }  
  
    public void setSource(Sourceable source) {  
        this.source = source;  
    }  
}  

public class MyBridge extends Bridge {  
    public void method(){  
        getSource().method();  
    }  
} 

　　测试

public class BridgeTest {  
      
    public static void main(String[] args) {  
          
        Bridge bridge = new MyBridge();  
          
        //调用第一个对象  
        Sourceable source1 = new SourceSub1();  
        bridge.setSource(source1);  
        bridge.method();  
          
        //调用第二个对象  
        Sourceable source2 = new SourceSub2();  
        bridge.setSource(source2);  
        bridge.method();  
    }  
}  

例如JDBC连接不同的数据库时

　

　　转自：http://blog.csdn.net/zhangerqing/article/details/8239539