我用mybatis 3.2.3版本接口编程，实现查询

配置如下：

<select id="selectOnly" resultType="Student" parameterType="int">
　　select * from student where stuid = #{stuid}
</select>

然后定义接口

public interface IStudentDAO{
　　//方法名与配置文件中的id相同
　　Student selectOnly(int stuid);
}

接下来：

SqlSession session = sqlfactory.openSession();

IStudentDAO isdao = session.getMapper(IStudentDAO.class);
Student stu = isdao.selectOnly(id);
System.out.println(stu);
session.close();

注：sqlfactory不为空，测试过

然后运行时报错：

Exception in thread "main" org.apache.ibatis.binding.BindingException: Type interface com.lc.inter.IStudentDAO is not known to the MapperRegistry.
at org.apache.ibatis.binding.MapperRegistry.getMapper(MapperRegistry.java:42)
at org.apache.ibatis.session.Configuration.getMapper(Configuration.java:655)
at org.apache.ibatis.session.defaults.DefaultSqlSession.getMapper(DefaultSqlSession.java:218)
at com.lc.dao.StudentDao.TestInterfaceOnly(StudentDao.java:67)
at com.lc.dao.StudentDao.main(StudentDao.java:77)

求解答啊，困惑了很久了！