4.Spring的三种实例化Bean的方式

1.使用类构造器实例化

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

2.使用静态工厂方法实例化

<bean id="personService" class="com.spring.service.impl.PersionServiceBeanFactory" factory-method="createPersonServiceBean"></bean>

package com.spring.service.impl;
import com.spring.service.PersonService;
public class PersionServiceBeanFactory
{
    public static PersonService createPersonServiceBean()
    {
        return new PersonServiceBean();
    }
}

3.使用实例工厂方法实例化

<bean id="personServiceFactory" class="com.spring.service.impl.PersionServiceBeanFactory"></bean>     

<bean id="personService" factory-bean="personServiceFactory" factory-method="createPersonServiceBean"></bean>

package com.spring.service.impl;
import com.spring.service.PersonService;
public class PersionServiceBeanFactory
{
    public PersonService createPersonServiceBean()
    {
        return new PersonServiceBean();
    }
}