spring中三种实例化bean的方法

1.使用类构造器实例化

<bean id="personService" class="com.lsq.service.impl.PersonServiceBean"></bean>

2.使用静态工厂方法实例化

<bean id="personService2" class="com.lsq.service.impl.PersonServiceBeanFactory" factory-method="createPersonServiceBean"/>

public class OrderFactory {

public static OrderServiceBean createOrder(){

return new OrderServiceBean();

}

}

3.使用实例工厂方法实例化:

<bean id="personServiceFactory" class="com.lsq.service.impl.PersonServiceBeanFactory"/>

<bean id="personService3" factory-bean="personServiceFactory" factory-method="createPersonServiceBean2"/>

public class OrderFactory {

public OrderServiceBean createOrder(){

return new OrderServiceBean();

}

}