如果你正在使用Hibernate 5.2及以上版本，那么你可以使用这个:

  private static StandardServiceRegistry registry;
  private static SessionFactory sessionFactory;

  public static SessionFactory getSessionFactory() {
    if (sessionFactory == null) {
      try {
        // Creating a registry
        registry = new StandardServiceRegistryBuilder().configure("hibernate.cfg.xml").build();

        // Create the MetadataSources
        MetadataSources sources = new MetadataSources(registry);

        // Create the Metadata
        Metadata metadata = sources.getMetadataBuilder().build();

        // Create SessionFactory
        sessionFactory = metadata.getSessionFactoryBuilder().build();

      } catch (Exception e) {
        e.printStackTrace();
        if (registry != null) {
          StandardServiceRegistryBuilder.destroy(registry);
        }
      }
    }
    return sessionFactory;
  }

  //To shut down
 public static void shutdown() {
    if (registry != null) {
      StandardServiceRegistryBuilder.destroy(registry);
    }
  }

博士TL;

是的，它是。有更好的方法引导Hibernate，比如下面的方法。

Hibernate-native引导

传统的Configuration对象不如使用BootstrapServiceRegistryBuilder强大，BootstrapServiceRegistryBuilder是Hibernate 4引入的:

final BootstrapServiceRegistryBuilder bsrb = new BootstrapServiceRegistryBuilder()
    .enableAutoClose();

Integrator integrator = integrator();
if (integrator != null) {
    bsrb.applyIntegrator( integrator );
}

final BootstrapServiceRegistry bsr = bsrb.build();

final StandardServiceRegistry serviceRegistry = 
    new StandardServiceRegistryBuilder(bsr)
        .applySettings(properties())
        .build();

final MetadataSources metadataSources = new MetadataSources(serviceRegistry);

for (Class annotatedClass : entities()) {
    metadataSources.addAnnotatedClass(annotatedClass);
}

String[] packages = packages();
if (packages != null) {
    for (String annotatedPackage : packages) {
        metadataSources.addPackage(annotatedPackage);
    }
}

String[] resources = resources();
if (resources != null) {
    for (String resource : resources) {
        metadataSources.addResource(resource);
    }
}

final MetadataBuilder metadataBuilder = metadataSources.getMetadataBuilder()
    .enableNewIdentifierGeneratorSupport(true)
    .applyImplicitNamingStrategy(ImplicitNamingStrategyLegacyJpaImpl.INSTANCE);

final List<Type> additionalTypes = additionalTypes();
if (additionalTypes != null) {
    additionalTypes.stream().forEach(type -> {
        metadataBuilder.applyTypes((typeContributions, sr) -> {
            if(type instanceof BasicType) {
                typeContributions.contributeType((BasicType) type);
            } else if (type instanceof UserType ){
                typeContributions.contributeType((UserType) type);
            } else if (type instanceof CompositeUserType) {
                typeContributions.contributeType((CompositeUserType) type);
            }
        });
    });
}

additionalMetadata(metadataBuilder);

MetadataImplementor metadata = (MetadataImplementor) metadataBuilder.build();

final SessionFactoryBuilder sfb = metadata.getSessionFactoryBuilder();
Interceptor interceptor = interceptor();
if(interceptor != null) {
    sfb.applyInterceptor(interceptor);
}

SessionFactory sessionFactory = sfb.build();

JPA bootstrap

你也可以使用JPA引导Hibernate:

PersistenceUnitInfo persistenceUnitInfo = persistenceUnitInfo(getClass().getSimpleName());
Map configuration = properties();

Interceptor interceptor = interceptor();
if (interceptor != null) {
    configuration.put(AvailableSettings.INTERCEPTOR, interceptor);
}

Integrator integrator = integrator();
if (integrator != null) {
    configuration.put(
        "hibernate.integrator_provider", 
        (IntegratorProvider) () -> Collections.singletonList(integrator));
}

EntityManagerFactoryBuilderImpl entityManagerFactoryBuilder = 
    new EntityManagerFactoryBuilderImpl(
        new PersistenceUnitInfoDescriptor(persistenceUnitInfo), 
        configuration
);
EntityManagerFactory entityManagerFactory = entityManagerFactoryBuilder.build();

这样，您构建的是EntityManagerFactory而不是SessionFactory。然而，SessionFactory扩展了EntityManagerFactory，因此构建的实际对象也是aSessionFactoryImpl’。

结论

这两个引导方法会影响Hibernate的行为。当使用本机引导时，Hibernate在遗留模式下工作，这早于JPA。

当使用JPA进行引导时，Hibernate将根据JPA规范进行操作。

这两种模式有几个不同之处:

AUTO flush模式如何在本地SQL查询中工作 实体代理是如何构建的。传统上，Hibernate在构建代理时不会触发DB，但是JPA需要抛出EntityNotFoundException异常，因此需要DB检查。 是否可以删除非纳管实体

有关这些差异的更多细节，请查看jpaccompliance类。

or

public class Hbutil {

    private static SessionFactory sessionFactory;
    private static ServiceRegistry serviceRegistry;

    private static SessionFactory configureSessionFactory() throws HibernateException {
        Configuration configuration = new Configuration();
        configuration.configure();
        serviceRegistry = new ServiceRegistryBuilder().applySettings(configuration.getProperties()).buildServiceRegistry();        
        sessionFactory = configuration.buildSessionFactory(serviceRegistry);
        return sessionFactory;
    }

    public static SessionFactory getSessionFactory() {
        return configureSessionFactory();

    }
}

Tested on 4.2.7 release

package com.national.software.hibernate;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

import com.national.software.dto.UserDetails;

public class HibernateTest {

    static SessionFactory sessionFactory;

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        UserDetails user = new UserDetails();
        user.setUserId(1);
        user.setUserName("user1");

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

        ServiceRegistry  serviceRegistry = (ServiceRegistry) new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();
        sessionFactory = config.buildSessionFactory(serviceRegistry);

        Session session = sessionFactory.openSession();
        session.beginTransaction();
        session.save(user);
        session.getTransaction().commit();

    }

}

在最新的hibernate 4.3.0版本中创建SessionFactory对象的更好方法如下:

Configuration configuration = new Configuration().configure();
StandardServiceRegistryBuilder builder = new StandardServiceRegistryBuilder().
applySettings(configuration.getProperties());
SessionFactory factory = configuration.buildSessionFactory(builder.build());

在不同版本的文档之间发现差异并不罕见。大多数开发人员认为文档是一件苦差事，他们倾向于推迟它。

根据经验，如果javadoc说了一件事，而一些非javadoc的文档与之相矛盾，那么javadoc很可能更准确。程序员更倾向于让javadoc与代码的变化保持同步…因为javadoc的“源代码”与代码在同一个文件中。

在@deprecated标记的情况下，javadoc几乎肯定更准确。开发人员经过仔细考虑后反对使用……而且(一般来说)他们不会对它们进行undeprecated。