動態代理代碼段

 class  MethodSelector implements InvocationHandler{

	private Object proxied;
	
	

	public MethodSelector(Object proxied) {
		super();
		this.proxied = proxied;
	}



	@Override
	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		//可以增加方法的判斷 並增加內容 
		if(method.getName().equals("interesting"))
			System.out.println("Proxy detected the interesting method");
		return method.invoke(proxied, args);
	}

}

 interface SomeMethods{
	 void boring1();
	 void boring2();
	 void boring3();
	 void interesting(String arg);
 }
 
 
 class Inplementation implements SomeMethods{

	@Override
	public void boring1() {
		// TODO Auto-generated method stub
		System.out.println("boring1");
	}

	@Override
	public void boring2() {
		// TODO Auto-generated method stub
		System.out.println("boring2");
	}

	@Override
	public void boring3() {
		// TODO Auto-generated method stub
		System.out.println("boring3");
	}

	@Override
	public void interesting(String arg) {
		// TODO Auto-generated method stub
		System.out.println("interesting"+arg);
	}
	 
	 
 }
 
 
 
public class SelectingMethods{
	 
	 public static void main(String[] args) {
		SomeMethods proxy=(SomeMethods)Proxy.newProxyInstance(
				SomeMethods.class.getClassLoader(), 
				new Class[]{SomeMethods.class},
				new MethodSelector(new Inplementation()));
		proxy.boring1();
		proxy.boring2();
		proxy.boring3();
		proxy.interesting("bonobo");
	}
 }