spring 的beans.xml问题

我用JUnit做测试最后出这个问题是怎么回事啊，是不是包引错了？求大神帮助

 Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [beans.xml]: Invocation of init method failed; nested exception is org.hibernate.MappingException: Could not determine type for: Integer, at table: questions, for columns: [org.hibernate.mapping.Column(id)]

http://www.cnblogs.com/davidwang456/p/4204569.html

http://www.myjourneyonjava.blogspot.com/2013/12/orghibernatemappingexception-could-not.html

hibernate 的映射有问题，是不是你的xxx.hbm.xml文件里的数据类型和数据库的没对应好