spring实例化bean的三种方式

使用构造器实例化bean

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

 

使用静态工厂方法实例化bean
 
 <bean id="personService2" class="com.cardvalue.bean.impl.PersonServiceBeanFactory" factory-method="createPersonServiceBean"></bean>

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

使用实例工厂方法实例化bean 
 <bean id="personServiceBeanFactory" class="com.cardvalue.bean.impl.PersonServiceBeanFactory"></bean>
 <bean id="personService3" factory-bean="personServiceBeanFactory" factory-method="createPersonServiceBean2"> </bean>
 

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