关于step7的接口newProxyInstance()参数问题

[heartbreaker97]

public static Object newProxyInstance(ClassLoader loader,
 Class<?>[] interfaces,
 InvocationHandler h) {
 Objects.requireNonNull(h);

 final Class<?> caller = System.getSecurityManager() == null
 ? null
 : Reflection.getCallerClass();

 /*
 * Look up or generate the designated proxy class and its constructor.
 */
 Constructor<?> cons = getProxyConstructor(caller, loader, interfaces);

 return newProxyInstance(caller, cons, h);
 }

第二个传入的参数应该是接口，需重新定义个接口，让HelloWorldService实现
return Proxy.newProxyInstance(getClass().getClassLoader(), adviceSupport.getTargetSource().getTargetClass().getInterfaces() , this);