深入了解JVM字节码增强技术

public interface BCInterface {
  void enhancement();
}

public class BCEnhancement implements BCInterface{
  public void enhancement() {
    System.out.println("hello enhancement");
  }
}

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
public class LogProxy implements InvocationHandler {
  private Object object;
  public Object getProxyObject(Object o){
    object=o;
    try{
      return Proxy.newProxyInstance(this.getClass().getClassLoader(),o.getClass().getInterfaces(),this);
    }catch (IllegalArgumentException e){
      throw new RuntimeException(e);
    }
  }
  public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
    System.out.println("before invoke ...");
    Object result= method.invoke(object,args);
    System.out.println("after invoke ...");
    return result;
  }
}

public class Test {
  public static void main(String[] args) {
    LogProxy logProxy = new LogProxy();
    System.setProperty("sun.misc.ProxyGenerator.saveGeneratedFiles", "true");
    BCInterface byteCodeEn = (BCInterface) logProxy.getProxyObject(new BCEnhancement());
    byteCodeEn.enhancement();
  }
}

before invoke ...
hello enhancement
after invoke ...