Java 将Hibernate连接到两个数据库时出现问题
我的JavaSpring+Hibernate程序在使用来自两台不同服务器的两个不同数据库时遇到问题 对于不同的数据库,我有两个DAO-s和两个DAO实现文件。 实现文件如下所示: 执行情况:Java 将Hibernate连接到两个数据库时出现问题,java,spring,hibernate,connection,multiple-databases,Java,Spring,Hibernate,Connection,Multiple Databases,我的JavaSpring+Hibernate程序在使用来自两台不同服务器的两个不同数据库时遇到问题 对于不同的数据库,我有两个DAO-s和两个DAO实现文件。 实现文件如下所示: 执行情况: @Repository("erpDao") @Transactional(value="txManager2") public class ErpDaoImplementation implements ErpDao { @Autowired private final SessionFactory se
@Repository("erpDao")
@Transactional(value="txManager2")
public class ErpDaoImplementation implements ErpDao {
@Autowired
private final SessionFactory sessionFactory2;
@Autowired
public ErpDaoImplementation(@Qualifier(value="sessionFactory2") final SessionFactory sessionFactory2) {
this.sessionFactory2 = sessionFactory2;
}
public Session getSession() {
return sessionFactory2.getCurrentSession();
}
@Override
public ArrayList<ErpOrder> getOrder() {
Criteria criteria = getSession().createCriteria(ErpOrder.class);
return (ArrayList<ErpOrder>) criteria.list();
}
}
@Repository("portalDao")
@Transactional(value="txManager1")
public class PortalDaoImplementation implements PortalDao {
@Autowired
private final SessionFactory sessionFactory1;
@Autowired
public PortalDaoImplementation(@Qualifier(value="sessionFactory1") final SessionFactory sessionFactory1) {
this.sessionFactory1 = sessionFactory1;
}
public Session getSession() {
return sessionFactory1.getCurrentSession();
}
@Override
public void saveEmployee(NewEmployeeBasic newEmployeeBasic) {
getSession().save(newEmployeeBasic);
}
@SuppressWarnings("unchecked")
@Override
public ArrayList<BasicInfo> findAllEmployees() {
Criteria criteria = getSession().createCriteria(BasicInfo.class).addOrder(Order.asc("name"));
return (ArrayList<BasicInfo>) criteria.list();
}
}
我看不出我做错了什么。请帮忙!:) 您的配置和设置存在多方面的缺陷。首先,字段和构造函数上都有
@Autowired
,它们相互干扰。由于@Primary
和这些注释,基本上只使用了一个会话工厂
。要修复此问题,请从会话工厂
字段中删除@Autowired
接下来,您需要2个HibernateTransactionManager
s,而不是一个,您不需要为每个SessionFactory
设置一个,您需要在@Transactional
注释中指定要使用的注释
@Repository("erpDao")
@Transactional(value="txManager2")
public class ErpDaoImplementation implements ErpDao {
private final SessionFactory sessionFactory2;
@Autowired
public ErpDaoImplementation(@Qualifier(value="sessionFactory2") final SessionFactory sessionFactory2) {
this.sessionFactory2 = sessionFactory2;
}
@Configuration
@EnableTransactionManagement
@ComponentScan({"com.alti.hrportal.configuration"})
public class HibernateConfiguration {
private static final PropertiesLoader propertiesLoader1 = new PropertiesLoader();
Properties propHrPortal = propertiesLoader1.load("application.properties");
private static final PropertiesLoader propertiesLoader2 = new PropertiesLoader();
Properties propErp = propertiesLoader2.load("applicationErp.properties");
@Bean
public LocalSessionFactoryBean sessionFactory2() {
LocalSessionFactoryBean sessionFactory2 = new LocalSessionFactoryBean();
sessionFactory2.setDataSource(dataSource2());
sessionFactory2.setPackagesToScan(new String[]{"com.alti.hrportal.model"});
sessionFactory2.setHibernateProperties(hibernateProperties2());
return sessionFactory2;
}
@Bean(name="txManager1")
public HibernateTransactionManager transactionManager1() {
HibernateTransactionManager txManager1 = new HibernateTransactionManager();
txManager1.setSessionFactory(sessionFactory1().getObject());
return txManager1;
}
@Bean(name="txManager2")
public HibernateTransactionManager transactionManager2() {
HibernateTransactionManager txManager2 = new HibernateTransactionManager();
txManager2.setSessionFactory(sessionFactory2().getObject());
return txManager2;
}
// Omitted other not modified configuration.
}
最后,由于@Primary
的原因,在发生冲突的情况下,将始终使用此代码。您希望明确指定要使用哪一个
@Repository("erpDao")
@Transactional(value="txManager2")
public class ErpDaoImplementation implements ErpDao {
private final SessionFactory sessionFactory2;
@Autowired
public ErpDaoImplementation(@Qualifier(value="sessionFactory2") final SessionFactory sessionFactory2) {
this.sessionFactory2 = sessionFactory2;
}
@Configuration
@EnableTransactionManagement
@ComponentScan({"com.alti.hrportal.configuration"})
public class HibernateConfiguration {
private static final PropertiesLoader propertiesLoader1 = new PropertiesLoader();
Properties propHrPortal = propertiesLoader1.load("application.properties");
private static final PropertiesLoader propertiesLoader2 = new PropertiesLoader();
Properties propErp = propertiesLoader2.load("applicationErp.properties");
@Bean
public LocalSessionFactoryBean sessionFactory2() {
LocalSessionFactoryBean sessionFactory2 = new LocalSessionFactoryBean();
sessionFactory2.setDataSource(dataSource2());
sessionFactory2.setPackagesToScan(new String[]{"com.alti.hrportal.model"});
sessionFactory2.setHibernateProperties(hibernateProperties2());
return sessionFactory2;
}
@Bean(name="txManager1")
public HibernateTransactionManager transactionManager1() {
HibernateTransactionManager txManager1 = new HibernateTransactionManager();
txManager1.setSessionFactory(sessionFactory1().getObject());
return txManager1;
}
@Bean(name="txManager2")
public HibernateTransactionManager transactionManager2() {
HibernateTransactionManager txManager2 = new HibernateTransactionManager();
txManager2.setSessionFactory(sessionFactory2().getObject());
return txManager2;
}
// Omitted other not modified configuration.
}
有什么问题?有错误消息吗?就像我说的application.properties文件中的数据库属性可以工作,但是applicationrep.properties属性不能工作。我的应用程序的第一页打开了,因为我没有使用数据库2中的任何内容。然后,当我从第一个页面登录我的应用程序时,我收到一条消息,说找不到db2中的一些表。什么意思是
不起作用了
?如果我更改第一个属性文件并插入db2的属性,那么它会找到这个表,但是找不到db1表。你能重构你的模型吗?它们有不同的包。然后将setPackagesToScan更改为重构包?你也帮了我:))