运行的时候找不到配置的Students的映射文件

<property name="hbm2ddl.auto">update</property>

<property name="hibernate.current_session_context_class">thread</property>

<mapping resource="entity/Students.hbm.xml"/>

<mapping  resource="entity/Users.hbm.xml"/>

</session-factory>

</hibernate-configuration>

我是这样配置的xml