单项选择题
A.BeanFactory factory =new BeanFactory（new FileInputStream（“beans.xml”））；
B.BeanFactory factory =new XmlBeanFactory（“classpath：beans.xml”）；
C.BeanFactory factory =new BeanFactory（“beans.xml”）；
D.BeanFactory factory =new XmlBeanFactory（newFileInputStream（“beans.xml”））；