spring LocalSessionFactoryBean轉換為hibernate的sessionfactory – JAVA編程語言程序開發技術文章

[html]
<?xml version="1.0" encoding="UTF-8"?>   
<beans xmlns="https://www.springframework.org/schema/beans"   
    xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance"   
    xmlns:aop="https://www.springframework.org/schema/aop"   
    xmlns:tx="https://www.springframework.org/schema/tx"   
    xsi:schemaLocation="https://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd   
        https://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd   
        https://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx.xsd">   
   
   
    <!–SessionFactory Transaction******************************************–>          
    <bean id="sessionFactory"   
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">   
        <property name="configLocation"   
            value="classpath:hibernate.cfg.xml">   
        </property>   
    </bean>   
  —————————————————————————— 
</beans>   
<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="https://www.springframework.org/schema/beans" 
    xmlns:xsi="https://www.w3.org/2001/XMLSchema-instance" 
    xmlns:aop="https://www.springframework.org/schema/aop" 
    xmlns:tx="https://www.springframework.org/schema/tx" 
    xsi:schemaLocation="https://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd 
        https://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd 
        https://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx.xsd"> 
 
 
    <!–SessionFactory Transaction******************************************–>        
    <bean id="sessionFactory" 
        class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> 
        <property name="configLocation" 
            value="classpath:hibernate.cfg.xml"> 
        </property> 
    </bean> 
  ——————————————————————————
</beans> 

問：

org.springframework.orm.hibernate3.LocalSessionFactoryBean;
這個類型根本沒有getCurrentSession的方法。
而productDAO中的sessionFactory是org.hibernate.SessionFactory，這中間的類型是怎麼轉換的啊？
試瞭一下往數據庫保存是成功的，就是想不通這個類型的轉換，我看LocalSessionFactoryBean也沒有實現SessionFactory這個接口啊? www.aiwalls.com
難道是LocalSessionFactoryBean的getObject()方法?

答：
正是如此!LocalSessionFactoryBean實現瞭org.springframework.beans.factory.FactoryBean接口, spring在裝配的時候, 如果發現實現瞭org.springframework.beans.factory.FactoryBean接口, 就會使用FactoryBean#getObject() 方法返回的對象裝配,具體的可以看下文檔.
如果你想拿到LocalSessionFactoryBean實例, 在id前面加個'&'就可以瞭,在你的配置文件中BeanFactory.getBean('&sessionFactory')拿到的就是LocalSessionFactoryBean的實例.
作者：Tender001