设计模式之【装饰者--Decorator】

package Decorator;

public interface Sourceable {
public void method();

}

package Decorator;

public class Source implements Sourceable{

@Override
public void method() {
// TODO Auto-generated method stub
System.out.println("接口原始方法的实现");
}

}

package Decorator;

//装饰类，在原有类的基础上通过接口添加新方法
public class Decorator implements Sourceable{
private Sourceable source;

public Decorator(Sourceable source){
super();    //调用父类构造方法
this.source = source;
}

@Override
public void method() {
// TODO Auto-generated method stub
System.out.println("装饰前");
source.method();
System.out.println("装饰后");
}

}

package Decorator;

public class DecoratorTest {

public static void main(String[] args) {
// TODO Auto-generated method stub
Sourceable    source = new Source();
Sourceable    obj = new Decorator(source);
obj.method();
}

}

装饰前
接口原始方法的实现
装饰后