请问hibernate连接数据库单元测试是按照老师的步骤走的,为什么会出错呢?谢谢...

十一月 07, 2016 4:25:58 下午 org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.2.Final}
十一月 07, 2016 4:25:58 下午 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.2.4.Final}
十一月 07, 2016 4:25:58 下午 org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
十一月 07, 2016 4:25:58 下午 org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
十一月 07, 2016 4:25:58 下午 org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
十一月 07, 2016 4:25:58 下午 org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
十一月 07, 2016 4:25:58 下午 org.hibernate.internal.util.xml.DTDEntityResolver resolveEntity
WARN: HHH000223: Recognized obsolete hibernate namespace http://hibernate.sourceforge.net/. Use namespace http://www.hibernate.org/dtd/ instead. Refer to Hibernate 3.6 Migration Guide!
十一月 07, 2016 4:25:58 下午 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: Students.hbm.xml