ConvertUtilsBean unable to process javassist classes

The ConvertUtils uses ConvertUtils.register(userConverter , User.class) to register a converter.
And use converters.get(clazz) in Converter.lookup() to find proper converter.
It won't work for javassist modified object .
for example , the User.class runtime becomes User_$$_javassist_0.class , and Converter is unable to find the corresponding converter.

So , I suggest the future version can loop the converters map , and use User.class.isAssignableFrom(clazz_in_map) to find corresponding converter.