在運行時動態創建支持autowire的Spring bean

Question

我嘗試動態初始化我的Hibernate DAO實例。

什麼給出：

• 通用DAO（GenericDaoImpl<T,PK extends Serializable>）
• DAO廠，應在包中每個模型類創建一個通用的DAO實例（我嘗試與反思的東西）
• 豆類似乎要創建，但只要我想自動裝配我收到一個異常
• 春「3.2.4.RELEASE」環境

GenericDaoFactory

@Configurable 
public class GenericDaoFactory { 

    @Autowired private AutowireCapableBeanFactory beanFactory; 
    @Autowired private SessionFactory sessionFactory; 

    @PostConstruct 
    private void createDynamicDaoBean() { 

     try { 
      // Example for employee variant 
      GenericDaoImpl<Employee, Integer> employeeDao = new GenericDaoImpl<Employee, Integer>(Employee.class, sessionFactory); 
      beanFactory.autowireBean(employeeDao); 
      beanFactory.initializeBean(employeeDao, "employeeDao"); 
     } catch(Exception e) { 
      e.getMessage(); 
     } 
    } 

} 

異常

Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: com..test.dao.GenericDaoImpl com.test.service.EmployeeService.employeeDao; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: 

Answer 1

雖然我強烈建議你使用類似Spring Data JPA你的配置是錯誤的（恕我直言）代替使用@Configurable bean，使用構造對象的@Configuration bean，它只是簡單地處理自動裝配。

@Configuration 
public class DaoConfiguration { 

    private SessionFactory sf; 

    @Bean 
    public GenericDao<Employee, Integer> employeeDao() { 
     return new GenericDaoImpl<Employee, Integer>(Employee.class, sessionFactory); 
    } 

    // Other daos 
} 

但是如前所述，而不是試圖破解了一下自己的通用解決方案道看看Spring Data JPA。