class org.hibernate.cfg.ExtendedMappings has interface org.hibernate.cfg.Mappings as super class

错误：class org.hibernate.cfg.ExtendedMappings has interface org.hibernate.cfg.Mappings as super class

原因：hibernate3.5中的hibernate3.0包，已经包涵了hibernate-annotations,hibernate-commons-annotations.jar,commons-collections这三个包，所以去掉前两个包试一下（去掉最后一个包会报类不存在NoSuchClass的错误），欢迎补充。