在基於Java的配置的Spring App上獲取SessionFactory

我需要將圖像上傳到數據庫（不確定是否這是一個好主意或者上傳文件並從數據庫中引用它），並且我已經定義了一個表單和一個控制器來做到這一點。問題是我需要將MultipartFile轉換爲Blob對象，爲此我需要使用需要Session對象的Hibernate.getLobCreator。在基於Java的配置的Spring App上獲取SessionFactory

這是使用第一次基於Java的配置，我有下一個類定義的持久化上下文：

@Configuration 
@EnableJpaRepositories(basePackages = { 
     "com.davidmogar.alsa" 
}) 
@EnableTransactionManagement 
public class PersistenceContext { 

    private static final String[] ENTITY_PACKAGES = { 
      "com.davidmogar.alsa.domain" 
    }; 

    private static final String PROPERTY_NAME_DB_DRIVER_CLASS = "db.driver"; 
    private static final String PROPERTY_NAME_DB_PASSWORD = "db.password"; 
    private static final String PROPERTY_NAME_DB_URL = "db.url"; 
    private static final String PROPERTY_NAME_DB_USER = "db.username"; 
    private static final String PROPERTY_NAME_HIBERNATE_DIALECT = "hibernate.dialect"; 
    private static final String PROPERTY_NAME_HIBERNATE_FORMAT_SQL = "hibernate.format_sql"; 
    private static final String PROPERTY_NAME_HIBERNATE_HBM2DDL_AUTO = "hibernate.hbm2ddl.auto"; 
    private static final String PROPERTY_NAME_HIBERNATE_NAMING_STRATEGY =  "hibernate.ejb.naming_strategy"; 
    private static final String PROPERTY_NAME_HIBERNATE_SHOW_SQL = "hibernate.show_sql"; 

    @Bean(destroyMethod = "close") 
    DataSource dataSource(Environment environment) { 
     HikariConfig dataSourceConfig = new HikariConfig(); 
       dataSourceConfig.setDriverClassName(environment.getRequiredProperty(PROPERTY_NAME_DB_DRIVER_CLASS)); 
     dataSourceConfig.setJdbcUrl(environment.getRequiredProperty(PROPERTY_NAME_DB_URL)); 
     dataSourceConfig.setUsername(environment.getRequiredProperty(PROPERTY_NAME_DB_USER)); 
     dataSourceConfig.setPassword(environment.getRequiredProperty(PROPERTY_NAME_DB_PASSWORD)); 

     return new HikariDataSource(dataSourceConfig); 
    } 

    @Bean(name = "entityManagerFactory") 
    LocalContainerEntityManagerFactoryBean entityManagerFactoryBean(DataSource dataSource, Environment environment) { 
     LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean(); 
     entityManagerFactoryBean.setDataSource(dataSource); 
     entityManagerFactoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter()); 
     entityManagerFactoryBean.setPackagesToScan(ENTITY_PACKAGES); 

     Properties jpaProperties = new Properties(); 

     jpaProperties.put(PROPERTY_NAME_HIBERNATE_DIALECT, environment.getRequiredProperty 
       (PROPERTY_NAME_HIBERNATE_DIALECT)); 

     jpaProperties.put(PROPERTY_NAME_HIBERNATE_HBM2DDL_AUTO, environment.getRequiredProperty 
       (PROPERTY_NAME_HIBERNATE_HBM2DDL_AUTO)); 

     jpaProperties.put(PROPERTY_NAME_HIBERNATE_NAMING_STRATEGY, environment.getRequiredProperty 
       (PROPERTY_NAME_HIBERNATE_NAMING_STRATEGY)); 

     jpaProperties.put(PROPERTY_NAME_HIBERNATE_SHOW_SQL, environment.getRequiredProperty 
       (PROPERTY_NAME_HIBERNATE_SHOW_SQL)); 

     jpaProperties.put(PROPERTY_NAME_HIBERNATE_FORMAT_SQL, environment.getRequiredProperty 
       (PROPERTY_NAME_HIBERNATE_FORMAT_SQL)); 

     entityManagerFactoryBean.setJpaProperties(jpaProperties); 

     return entityManagerFactoryBean; 
    } 

    @Bean 
    JpaTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) { 
     JpaTransactionManager transactionManager = new JpaTransactionManager(); 
     transactionManager.setEntityManagerFactory(entityManagerFactory); 

     return transactionManager; 
    } 

}

我怎樣才能獲得會話控制器到MultipartFile轉換？

來源

2014-12-21 David Moreno García

爲什麼不簡單地使用一個包含'byte []'作爲文件內容的hibernate託管對象，這可以作爲一個blob自動存儲。不需要自己搞砸。 –

您可以通過EntityManager獲取Hibernate Session的實例。

@Autowired 
private EntityManagerFactory emf; 

public void foo(){ 
EntityManager em = emf.createEntityManager(); 
Session session = em.unwrap(Session.class); 
LobCreator lob = getLobCreator(session); 
... 
}

來源

2014-12-21 15:45:47

在基於Java的配置的Spring App上獲取SessionFactory

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