“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

add Mapper class to your SqlSessionFactory Configuration as this:

SqlSessionFactory factory = new SqlSessionFactoryBuilder()
            .build(reader);

//very import
factory.getConfiguration().addMapper(BarMapper.class);

SqlSession sqlSession = factory.openSession();