hibernate 报错，在session.save（s）出错，求教

根据视频来的，hibernate用的hibernate-release-5.2.5.Final

我的程序日志，然后就停了，请问是什么错误。

十二月 09, 2016 10:03:32 上午 org.hibernate.Version logVersion

INFO: HHH000412: Hibernate Core {5.2.5.Final}

十二月 09, 2016 10:03:32 上午 org.hibernate.cfg.Environment <clinit>

INFO: HHH000206: hibernate.properties not found

十二月 09, 2016 10:03:32 上午 org.hibernate.annotations.common.reflection.java.JavaReflectionManager <clinit>

INFO: HCANN000001: Hibernate Commons Annotations {5.0.1.Final}

十二月 09, 2016 10:03:32 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure

WARN: HHH10001002: Using Hibernate built-in connection pool (not for production use!)

十二月 09, 2016 10:03:32 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator

INFO: HHH10001005: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql:mem:hibernate;DB_CLOSE_DELAY=-1;MVCC=TRUE]

十二月 09, 2016 10:03:32 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator

INFO: HHH10001001: Connection properties: {user=root, password=****}

十二月 09, 2016 10:03:32 上午 org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl buildCreator

INFO: HHH10001003: Autocommit mode: false

十二月 09, 2016 10:03:32 上午 org.hibernate.engine.jdbc.connections.internal.PooledConnections <init>

INFO: HHH000115: Hibernate connection pool size: 20 (min=1)

源码：

import java.util.Date;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;

import org.hibernate.boot.registry.StandardServiceRegistryBuilder;

import org.hibernate.cfg.Configuration;

import org.hibernate.service.ServiceRegistry;

import org.junit.After;

import org.junit.AfterClass;

import org.junit.Before;

import org.junit.BeforeClass;

import org.junit.Test;

public class StudentTest {

private SessionFactory sessionFactory;

private Session session;

private Transaction transaction;

@Before

public void InitialContext(){

Configuration config = new Configuration().configure();

ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder().applySettings(config.getProperties()).build();

sessionFactory = config.buildSessionFactory(serviceRegistry);

session = sessionFactory.openSession();

transaction = session.beginTransaction();

}

@After

public void destory(){

transaction.commit();

session.close();

sessionFactory.close();

}

@Test

public void testSaveStudents(){

Student s = new Student(1,"张三丰","男",new Date(),"武当山");

session.save(s);

}

}

hibernate配置文件：

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-configuration PUBLIC

"-//Hibernate/Hibernate Configuration DTD 3.0//EN"

"http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

    <property name="connection.username">root</property>

    <property name="connection.password">1234</property>

    <property name="connection.driver_class">com.mysql.jdbc.Driver</property>

    <!-- 

    <property name="connection.url">jdbc:mysql:///hibernate?useUnicode=true&amp;characterEncoding=UTF-8</property>

    -->

    <property name="connection.url">jdbc:mysql:mem:hibernate;DB_CLOSE_DELAY=-1;MVCC=TRUE</property>

    <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>

    <property name="show_sql">true</property>

    <property name="format_sql">true</property>

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

    <mapping resource="Student.hbm.xml"/>

    </session-factory>

</hibernate-configuration>

在session.save（s）出错，求教