Spring的三种实例化Bean的方式

配置方式如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">
          <bean id="personService" class="cn.itcast.service.impl.PersonServiceBean"></bean>
          <bean id="personService2" class="cn.itcast.service.impl.PersonServiceBeanFactory" factory-method="createPersonServiceBean"></bean>
          
          <bean id="personServiceBeanFactory" class="cn.itcast.service.impl.PersonServiceBeanFactory"></bean>
           <bean id="personService3" factory-bean="personServiceBeanFactory" factory-method="createPersonServiceBean"></bean>
</beans>

配置中调用到的一个FactoryBean具体代码如下：

package cn.itcast.service.impl;
public class PersonServiceBeanFactory {
	public static PersonServiceBean createPersonServiceBean(){
		return new PersonServiceBean();
	}
	
	public PersonServiceBean createPersonServiceBean2(){
		return new PersonServiceBean();
	}
}

这个FactroyBean类用到了一个Static类型方法，说明只能被本类才能直接调用，外Bean条用不到这static类型的方法。

如果把第三种实例化中的createPersonServiceBean2改成createPersonServiceBean后就会报错...

原因很简单，不能匹配到这个工厂方法(No matching factory method )。