"Type interface is not known to the MapperRegistry" exception using mybatis

Question

I'm setting up mybatis using annotations, and getting this helpful exception

org.apache.ibatis.binding.BindingException: Type interface org.foo.Bar is not known to the MapperRegistry

Googling it doesn't find anything, nor the user guide. What am I missing?

Answer 1

OK, got it - this is happening because I was using a XML file for the configuration, and annotations for the mappers themselves - and mybatis doesn't find mapper annotations when using an XML config.

See this followup question.