springboot中hibernate配置sessionFactory访问数据库

方式一：

@Configuration
public class HibernateConfig {
    
    @Bean
    public SessionFactory sessionFactory(@Qualifier("entityManagerFactory") EntityManagerFactory emf){
         return emf.unwrap(SessionFactory.class);
     }
}

方式二：

@Autowired
private EntityManagerFactory entityManagerFactory;

@Bean
public SessionFactory getSessionFactory() {
    if (entityManagerFactory.unwrap(SessionFactory.class) == null) {
        throw new NullPointerException("factory is not a hibernate factory");
    }
    return entityManagerFactory.unwrap(SessionFactory.class);
}

方式三：

在属性配置文件中配置(可有可无)

spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate4.SpringSessionContext

然后配置

@Bean
public HibernateJpaSessionFactoryBean sessionFactory() {
    return new HibernateJpaSessionFactoryBean();
}

方式四：

在属性配置文件中配置(可有可无)

spring.jpa.properties.hibernate.current_session_context_class=org.springframework.orm.hibernate4.SpringSessionContext

然后配置

@Bean
public SessionFactory sessionFactory(HibernateEntityManagerFactory hemf) {
    return hemf.getSessionFactory();
}

调用

@Autowired
private SessionFactory sessionFactory;

from：https://www.cnblogs.com/soul-wonder/p/9052471.html

备注：以上是别人的配置，我测试过，好像有些有点问题。下面是我根据别人的描述，自己的配置，亲测有效

@Repository("baseDao")
@Transactional
public class BaseDaoImpl implements BaseDao {
    
	@PersistenceContext
    @Autowired
	private EntityManager entityManagerFactory;
	
	@Bean
	public Session getCurrentSession() {
	    return this.entityManagerFactory.unwrap(Session.class);
	}

    public <T> Serializable save(T obj) {

        return this.getCurrentSession().save(obj);
    }

    .....

spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/数据库名
    username: 用户名
    password: 秘密
    driver-class-name: com.mysql.jdbc.Driver
  jpa:
    open-in-view: true
    #database-platform: org.hibernate.dialect.MySQLDialect
    properties:
      hibernate:
        dialect: org.hibernate.dialect.MySQL5Dialect
        current_session_context_class: org.springframework.orm.hibernate5.SpringSessionContext
    hibernate:
      ddl-auto: update
      naming:
        physical-strategy: org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl
  activiti:
    check-process-definitions: false
    db-identity-used: false