“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

Answer 1

Type interface org.domain.classmapper is not known to the MapperRegistry

MyBatis throws this exception if the full package / class is not entered into the mapper xml namespace.

e.g. <mapper namespace="classmapper"> causes exception, but

<mapper namespace="org.domain.classmapper"> works