Proxy代理

静态代理

//静态代理
public class Tank implements movable{
    @Override
    public void move() {
        System.out.println("调用了move方法");
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}
class MoveTimeProxy implements movable{
    movable m;
    public MoveTimeProxy(movable m) {
        this.m = m;
    }
    @Override
    public void move() {
        long start = System.currentTimeMillis();
        m.move();
        long end = System.currentTimeMillis();
        System.out.println("运行时间："+(end-start));
    }
}
class MoveLogProxy implements movable{
    movable m;
    public MoveLogProxy(movable m) {
        this.m = m;
    }
    @Override
    public void move() {
        System.out.println("start move");
        m.move();
        System.out.println("move end");
    }
    public static void main(String[] args) {
        new MoveLogProxy(new MoveTimeProxy(new Tank())).move();
    }
}
interface movable{
    public void move();
}

动态代理

//静态代理
public class Tank implements movable{
    @Override
    public void move() {
        System.out.println("调用了move方法");
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
    public static void main(String[] args) {
        Tank tank = new Tank();
        movable movable = (movable) Proxy.newProxyInstance(
                Tank.class.getClassLoader(),
                new Class[]{movable.class},
                new LogHander(tank));
        movable.move();
    }
}
class LogHander implements InvocationHandler{
    Tank tank;
    public LogHander(Tank tank) {
        this.tank = tank;
    }
    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        System.out.println("method:"+method.getName()+"start");
        Object invoke = method.invoke(tank, args);
        System.out.println("method:"+method.getName()+"end");
        return invoke;
    }
}
interface movable{
    public void move();
}