How to know original class name if wrapped into proxy by Spring?

Spring provides a utility for this.

http://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/util/ClassUtils.html#getUserClass-java.lang.Class-

public static Class<?> getUserClass(Class<?> clazz)

“Return the user-defined class for the given class: usually simply the given class, but the original class in case of a CGLIB-generated subclass.”