JAXB XML Object Marshalling without any namespace prefixes

Question

Yes, I already found this JAXB XML Object Marshalling without namespace prefixes...

But my problem is that I have different namespaces in my xml so what jaxb produces is:

<Root xmlns="http://A" xmlns:ns1="http://B">
    <A>
       <A1 />
    </A>
    <ns1:B>
       <ns1:B1 />
    </ns1:B>
</Root>

but what I need is

<Root xmlns="http://A">
    <A>
       <A1 />
    </A>
    <B xmlns="http://B">
       <B1 />
    </B>
 </Root>

How is it possible to archive this?