老师我第一个单元测试的时候报错，我把sessionFaction注释掉后运行juint没有报错，但navicat里没有表生成，我想问是什么原因啊，控制台打印的代码如下

八月 23, 2015 12:09:29 上午 org.hibernate.annotations.common.Version <clinit>

INFO: HCANN000001: Hibernate Commons Annotations {4.0.2.Final}

八月 23, 2015 12:09:29 上午 org.hibernate.Version logVersion

INFO: HHH000412: Hibernate Core {4.2.4.Final}

八月 23, 2015 12:09:29 上午 org.hibernate.cfg.Environment <clinit>

INFO: HHH000206: hibernate.properties not found

八月 23, 2015 12:09:29 上午 org.hibernate.cfg.Environment buildBytecodeProvider

INFO: HHH000021: Bytecode provider name : javassist

八月 23, 2015 12:09:29 上午 org.hibernate.cfg.Configuration configure

INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml

八月 23, 2015 12:09:29 上午 org.hibernate.cfg.Configuration getConfigurationInputStream

INFO: HHH000040: Configuration resource: /hibernate.cfg.xml

八月 23, 2015 12:09:29 上午 org.hibernate.cfg.Configuration addResource

INFO: HHH000221: Reading mappings from resource: entity/Students.hbm.xml

八月 23, 2015 12:09:30 上午 org.hibernate.cfg.Configuration addResource

INFO: HHH000221: Reading mappings from resource: entity/Users.hbm.xml

八月 23, 2015 12:09:30 上午 org.hibernate.cfg.Configuration doConfigure

INFO: HHH000041: Configured SessionFactory: null

八月 23, 2015 12:09:30 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000402: Using Hibernate built-in connection pool (not for production use!)

八月 23, 2015 12:09:30 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000115: Hibernate connection pool size: 20

八月 23, 2015 12:09:30 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000006: Autocommit mode: false

八月 23, 2015 12:09:30 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc://localhost:3306/test?useUnicode=true&characterEncoding=utf8]

八月 23, 2015 12:09:30 上午 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

INFO: HHH000046: Connection properties: {user=root, password=****}