ByteBuddy如何在类加载时执行一些代码

import net.bytebuddy.ByteBuddy;
import net.bytebuddy.implementation.MethodDelegation;
import net.bytebuddy.matcher.ElementMatchers;

public class MyClass {
    public static void main(String[] args) throws Exception {
        // 创建一个代理类，实现一个接口，并在方法中执行额外的代码
        Class<?> proxyClass = new ByteBuddy()
                .subclass(MyInterface.class)
                .method(ElementMatchers.any())
                .intercept(MethodDelegation.to(MyInterceptor.class))
                .make()
                .load(MyClass.class.getClassLoader())
                .getLoaded();

        // 使用自定义的类加载器加载代理类
        ClassLoader classLoader = new MyClassLoader();
        Class<?> loadedClass = classLoader.loadClass(proxyClass.getName());

        // 创建代理类的实例并调用方法
        MyInterface proxyInstance = (MyInterface) loadedClass.getDeclaredConstructor().newInstance();
        proxyInstance.myMethod();
    }
}

public interface MyInterface {
    void myMethod();
}

public class MyInterceptor {
    public static void intercept() {
        System.out.println("Before method execution");
    }
}

public class MyClassLoader extends ClassLoader {
    @Override
    protected Class<?> findClass(String name) throws ClassNotFoundException {
        // 在类加载前执行一些代码
        System.out.println("Before class loading");

        // 使用ByteBuddy创建的代理类的字节码
        byte[] byteCode = /* 代理类的字节码 */;

        // 将代理类的字节码加载到类加载器中
        return defineClass(name, byteCode, 0, byteCode.length);
    }

    @Override
    protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
        // 在类加载后执行一些代码
        System.out.println("After class loading");

        return super.loadClass(name, resolve);
    }
}