三中实例化bean的方式(学习笔记)

bean配置：
<!-- 三种实例化bean的配置 -->
<!-- 第一种 :默认构造方法-->
<bean id="personService" class="com.river.service.impl.PersonServiceBean"/>
<!-- 第二种 ：静态工厂方法-->
<bean id="personService1" class="com.river.service.impl.PersonServiceBeanFactory" factory-method="personService"></bean>
<!-- 第三种 ：实例工厂方法-->
<bean id="personServiceFactory" class="com.river.service.impl.PersonServiceBeanFactory"></bean>
<bean id="personService2" factory-bean="personServiceFactory" factory-method="personService1"></bean>

工厂类：
/**
* 工厂方法实例化bean
* @author river
*
*/
public class PersonServiceBeanFactory
{
public static PersonService personService()
{
return new PersonServiceBean();
}
public PersonService personService1()
{
return new PersonServiceBean();
}
}

PersonServiceBean类：
public class PersonServiceBean implements PersonService {

/* (non-Javadoc)
* @see com.river.spring.PwesionService#save()
*/
public void save()
{
System.out.println("save ()");
}
}

测试：
public void instanceSpring()
{
//RiverClassPathXMLApplicationContext ctx = new RiverClassPathXMLApplicationContext("beans.xml");
ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml");
PersonService ps = (PersonService) ctx.getBean("personService2");
ps.save();
}

结果：save()