JDK动态代理生成的字节码文件保存到本地

 在idea中查找ProxyGenerator类，查看类的全路径，选择以下对应的代码

System.getProperties().put("jdk.proxy.ProxyGenerator.saveGeneratedFiles","true");

或 

System.getProperties().put("sun.misc.ProxyGenerator.saveGeneratedFiles","true");

demo如下：

package designpattern.proxy.v3;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Random;

/**
 * 动态代理
 *
 * @Auther: IceBear
 * @Date: 2022/2/13 19:25
 * @Description:
 */
public class ProxyMain {
    public static void main(String[] args) {
//        System.getProperties().put("jdk.proxy.ProxyGenerator.saveGeneratedFiles","true");
        System.getProperties().put("sun.misc.ProxyGenerator.saveGeneratedFiles","true");
        Tank tank = new Tank();
        Movable m=(Movable) Proxy.newProxyInstance(Tank.class.getClassLoader(),
                new Class[]{Movable.class},new LogHandler(tank));
        m.move();
    }

}

class Tank implements Movable {
    @Override
    public void move() {
        System.out.println("Tank is moving...");
        try {
            Thread.sleep(new Random().nextInt(100));
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }
}


class LogHandler implements InvocationHandler {
    Tank tank;

    public LogHandler(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 o = method.invoke(tank, args);
        System.out.println("method," + method.getName() + ",end");
        return o;
    }
}

interface Movable {
    void move();
}