JDK动态代理 思路整理

1.提供一个接口和实现类

public interface Skill {
    void run();
    void swim();
}

public class Althletes implements Skill{

    @Override
    public void run() {
        System.out.println("Run fast");
    }

    @Override
    public void swim() {
        System.out.println("Swim fast");
    }
}

2.创建代理类 传入目标对象

public class AlthleteProxy {
	public Skill AlthleteProxy(Althletes obj) {
		return (Skill) Proxy.newProxyInstance(obj.getClass().getClassLoader(), obj.getClass().getInterfaces()
        	, ((proxy, method, args) ->  {
        	System.out.println("Start");
        	Object result = method.invoke(proxy, args);
        	System.out.println("Finish");
        	return result;
        	};));
	}
}

3.调用代理对象

public class Main { 
	public static void main(String[] args) {
		Skill s = new AlthleteProxy(new Althletes);
		s.run();
		s.swim();
	}
}

ねぇ,あなたは何色になりたい