Spring中FactoryBean的使用方法

能够理解为工厂非静态方法的特例：

import org.joda.time.DateTime;
import org.springframework.beans.factory.FactoryBean;

public class NextDayDateFactoryBean implements FactoryBean
{

	@Override
	public Object getObject() throws Exception
	{
		// TODO Auto-generated method stub
		return new DateTime().plus(1);
	}

	@Override
	public Class getObjectType()
	{
		// TODO Auto-generated method stub
		return DateTime.class;
	}

	@Override
	public boolean isSingleton()
	{
		// TODO Auto-generated method stub
		return false;
	}

}

<bean id="nextDayDate" class="com.uqee.spring.beans.NextDayDateFactoryBean"></bean>

此时调用getBean("nextDayDate")返回的是NextDayDateFactoryBean实例返回的DateTime对象，而不是 NextDayDateFactoryBean对象, 要获得该FactoryBean可经过以下方法访问：

Object o2 = factory.getBean("&nextDayDate");