在Hibernate中连接多个数据库

@Configuration
public class DataSourceConfig {

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.primary")
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }

    @Bean
    @ConfigurationProperties(prefix = "spring.datasource.secondary")
    public DataSource secondaryDataSource() {
        return DataSourceBuilder.create().build();
    }
}

@Configuration
public class HibernateConfig {

    @Bean
    public LocalSessionFactoryBean primarySessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(primaryDataSource());
        sessionFactory.setPackagesToScan("com.example.primary.model");
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
    }

    @Bean
    public LocalSessionFactoryBean secondarySessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(secondaryDataSource());
        sessionFactory.setPackagesToScan("com.example.secondary.model");
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
    }
}

@Configuration
public class TransactionConfig {

    @Bean
    public PlatformTransactionManager primaryTransactionManager() {
        HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        transactionManager.setSessionFactory(primarySessionFactory().getObject());
        return transactionManager;
    }

    @Bean
    public PlatformTransactionManager secondaryTransactionManager() {
        HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        transactionManager.setSessionFactory(secondarySessionFactory().getObject());
        return transactionManager;
    }
}

@Service
public class PrimaryService {

    @Autowired
    private PrimaryRepository primaryRepository;

    @Transactional(readOnly = true)
    public List<PrimaryEntity> findAll() {
        return primaryRepository.findAll();
    }
}

@Service
public class SecondaryService {

    @Autowired
    private SecondaryRepository secondaryRepository;

    @Transactional(readOnly = true)
    public List<SecondaryEntity> findAll() {
        return secondaryRepository.findAll();
    }
}