关于1.5.10版本的Spring Boot
。RELEASE版本。它在内部与版本的Hibernate
一起工作5.0.12.Final
目的是避免以下错误消息:
required a bean of type 'org.hibernate.SessionFactory' that could not be found
应该应用HibernateJpaSessionFactoryBean
类。它来自:
这里的情况是HibernateJpaSessionFactoryBean
类是@Deprecated
。
根据HibernateJpaSessionFactoryBean javadoc建议的解决方案是如何使用EntityManagerFactory#un行
因此从:
必须手动声明以下内容:
@Bean
public SessionFactory sessionFactory(EntityManagerFactory emf) {
return emf.unwrap(SessionFactory.class);
}
警告是强制性的在application.properties
文件中包含以下内容(上面分享的帖子中没有提到):
spring.jpa.properties.hibernate.current_session_context_class =
org.springframework.orm.hibernate5.SpringSessionContext
否则出现:
org.springframework.orm.jpa.JpaSystemException:
No CurrentSessionContext configured!; nested exception is org.hibernate.HibernateException:
No CurrentSessionContext configured!
直到这里我的@Test
类通过Hibernate
工作失败,这些相同的@Test
类通过Spring Framework
传入其他项目,因此Hibernate
的所有基础设施都被手动声明。
因此通过以下代码:
@Test
public void contextLoads() {
String[] beanNames = applicationContext.getBeanDefinitionNames();
Arrays.sort(beanNames);
for (String beanName : beanNames) {
logger.info("beanName: {}", beanName);
}
logger.info("PlatformTransactionManager");
if(transactionManager != null) {
logger.info("Class: {}", transactionManager.getClass().getName());
}
}
Spring Boot
创建的所有bean
都打印出来,我已确认以下内容:
- PlatformTransactionManager
- Class: org.springframework.orm.jpa.JpaTransactionManager
我期望HibernateTransactionManager
而不是JpaTransactionManager
。
我获得@Test
方法通过的独特方法是再次手动声明其他@Bean
:
@Bean
public PlatformTransactionManager transactionManager(SessionFactory sessionFactory){
HibernateTransactionManager transactionManager = new HibernateTransactionManager();
transactionManager.setSessionFactory(sessionFactory);
return transactionManager;
}
因此:
Hibernate 5
的Spring Boot 1.5. x
的正确完整配置是什么?观察:如果一切都通过application.properties
文件完全配置,那就更好了(目的是避免手动声明任何@Bean
)
总结一下,为普通Hibernate
集成Spring Boot
的独特方式(考虑将通过Spring Framework
工作的完整项目迁移到使用Hibernate
的Spring Boot的场景)是通过以下方式:
spring.jpa.hibernate.ddl-auto = none
spring.jpa.properties.hibernate.cache.provider_class = org.hibernate.cache.NoCacheProvider
spring.jpa.properties.hibernate.current_session_context_class = org.springframework.orm.hibernate5.SpringSessionContext
spring.jpa.properties.hibernate.default_batch_fetch_size = 30
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.H2Dialect
spring.jpa.properties.hibernate.format_sql = true
spring.jpa.properties.hibernate.jdbc.batch_size = 30
spring.jpa.properties.hibernate.max_fetch_depth = 30
spring.jpa.properties.hibernate.order_updates = true;
spring.jpa.properties.hibernate.show_sql = false
spring.jpa.properties.hibernate.use_sql_comments = true
加上这两个强制要求@Beans
@Bean
public SessionFactory sessionFactory(EntityManagerFactory emf) {
return emf.unwrap(SessionFactory.class);
}
@Bean
public PlatformTransactionManager transactionManager(SessionFactory sessionFactory){
HibernateTransactionManager transactionManager = new HibernateTransactionManager();
transactionManager.setSessionFactory(sessionFactory);
return transactionManager;
}
如果没有这两个@Beans
,我已经报告了所有两个错误。
因此,目标是通过application.properties
配置Hibernate
这是一个建议(Spring Boot 1.5.10. RELEASE)
文件application.properties
spring.datasource.url=jdbc:mysql://localhost:3306/vy
spring.datasource.username=root
spring.datasource.password=123456
# Keep the connection alive if idle for a long time (needed in production)
spring.datasource.testWhileIdle=true
spring.datasource.validationQuery=SELECT 1
spring.jpa.show-sql=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.hibernate.naming-strategy=org.hibernate.cfg.ImprovedNamingStrategy
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
文件BeanConfig.java
package com.example;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.persistence.EntityManagerFactory;
@Configuration
public class BeanConfig {
@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);
}
}
文件UserDao.java
package com.example.dao;
import com.example.model.UserDetails;
import java.util.List;
public interface UserDao {
List<UserDetails> getUserDetails();
}
使用SessionFactory的文件UserDaoImpl.java
package com.example.dao.impl;
import com.example.dao.UserDao;
import com.example.model.UserDetails;
import org.hibernate.Criteria;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.util.List;
@Component
public class UserDaoImpl implements UserDao {
@Autowired
private SessionFactory sessionFactory;
public List<UserDetails> getUserDetails() {
Criteria criteria = sessionFactory.openSession().createCriteria(UserDetails.class);
return criteria.list();
}
}
目标是通过application.properties配置Hibernate
--
它不确定与HibernateORM的全部功能。