平时几乎每个单元测试开头都要写以下代码，神烦！
1     private Session session;
2     private Transaction transaction;
3
4     @Before
5     public void init(){
6         session = getSession();
7         transaction = session.beginTransaction();
8     }
9
10     @After
11     public void destroy(){
12         transaction.commit();
13         session.close();
14     }
　　要把它封装一下，做了一个父类：BaseTest，让所有需要上面代码的单元测试都及继承这个父类，具体内容如下：
1 class BaseTest {
2     static Session session;
3     private static Transaction transaction;
4
5     @Before
6     public void init() {
7         session = getSession();
8         transaction = session.beginTransaction();
9         System.out.println("[时间]"+new Date()+"    session创建成功！事务已开启！");
10     }
11
12     @After
13     public void destroy() {
14         transaction.commit();
15         session.close();
16         System.out.println("[时间]"+new Date()+"    事务已提交！session已销毁！");
17     }
18 }
　　然后子类可以这么写：
public class QueryByCriteria extends BaseTest {
@Test
public void QueryTest(){
Criteria criteria = session.createCriteria(ClassRoom.class);
List<ClassRoom> list = criteria.list();
list.stream()
.forEach(item->System.out.println(item.getClassName()));
}
}
　　后附上HibernateUtil：
public class HibernateUtil {
private static final SessionFactory sessionFactory = buildSessionFactory();
private static SessionFactory buildSessionFactory() {
try {
Configuration configuration = new Configuration();
configuration.configure("Hibernate.cfg.xml");
//        在下面添加映射，不要写在配置文件中
configuration.addAnnotatedClass(ClassRoom.class);
StandardServiceRegistryBuilder ssrb = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties());
return configuration.buildSessionFactory(ssrb.build());
}
catch (Throwable ex) {
System.err.println("Initial SessionFactory creation failed !" + ex);
throw new ExceptionInInitializerError(ex);
}
}
public static SessionFactory getSessionFactory() {
return sessionFactory;
}
public static Session getSession() throws HibernateException {
return sessionFactory.openSession();
}
}