bean的三种实例化方式

1.使用类 构造器实例化

<bean id="" class=""></bean>

2.使用静态工厂方法实例化

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

public class PersonServiceBeanFactory {

public static PersonServiceBean createPersonServiceBean(){
return new PersonServiceBean();
}

}

3.实例工厂方法

public PersonServiceBean createPersonServiceBean2(){
return new PersonServiceBean();
}

<bean id="PersonServiceBeanFactory" class="com.cn.service.impl.PersonServiceBeanFactory"></bean>
<bean id="personService3" factory-bean="PersonServiceBeanFactory" factory-method="createPersonServiceBean2"></bean>