Question

我正在使用java配置进行hibernate，spring示例。我的配置文件是这样的：

@Bean
    @Autowired
    public HibernateTransactionManager transactionManager(SessionFactory s) {
       HibernateTransactionManager txManager = new HibernateTransactionManager();
       txManager.setSessionFactory(s);
       return txManager;
    }

@Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
        sessionFactory.setDataSource(dataSource());
        sessionFactory.setPackagesToScan(new String[] { "dto" });
        sessionFactory.setHibernateProperties(hibernateProperties());
        return sessionFactory;
     }

工作正常。没问题，但是当我手动尝试为trasactionManager设置sessionfactory参数时，如下所示..

@Bean
    @Autowired
    public HibernateTransactionManager transactionManager(SessionFactory s) {
       HibernateTransactionManager txManager = new HibernateTransactionManager();
       txManager.setSessionFactory(sessionFactory());
       return txManager;
    }

IDE显示 - The method setSessionFactory(SessionFactory) in the type HibernateTransactionManager is not applicable for the arguments (LocalSessionFactoryBean)

所以我创建了一个像下面这样的sessionFactory

@Bean
    @Autowired
    public SessionFactory sessionFactory(DataSource dataSource) {
        LocalSessionFactoryBuilder sessionFactory = new LocalSessionFactoryBuilder(dataSource);
        sessionFactory.addProperties(hibernateProperties());
        sessionFactory.scanPackages("dto");
        return sessionFactory.buildSessionFactory();

    }

并传递给trasactionManager它工作。

我的问题是，即使第一种方法中没有sessionFactory实例，spring如何自动装入sessionFactory对象？

请澄清..

Answer 1

您需要将方法返回类型更改为：

的SessionFactory
PlatformTransactionManager

这应该是这样的：

@Bean
@Autowired
public PlatformTransactionManager transactionManager(SessionFactory s) {
   HibernateTransactionManager txManager = new HibernateTransactionManager();
   txManager.setSessionFactory(s);
   return txManager;
}

@Bean
public SessionFactory sessionFactory() {
    Properties properties = new Properties();
    properties.setProperty("hibernate.show_sql", "true")
    properties.setProperty("hibernate.cache.region.factory_class", "org.hibernate.cache.ehcache.EhCacheRegionFactory")
    properties.setProperty("hibernate.cache.use_query_cache", "true")
    properties.setProperty("hibernate.cache.use_second_level_cache", "true")
    properties.setProperty("hibernate.dialect", "org.hibernate.dialect.HSQLDialect")

    return new LocalSessionFactoryBuilder(dataSource())
        .scanPackages("dto")
        .addProperties(properties)
        .buildSessionFactory();
}

即使没有sessionFactory实例存在，spring如何自动装配sessionFactory对象

1 个答案: