BeanFactory的初始化

• 类路径加载配置文件

  Resource resources = new ClassPathResource("applicationContext.xml");
  BeanFactory bf = new XmlBeanFactory(resources);
  BookDao bookDao = bf.getBean(BookDao.class);
  bookDao.save();
  

• BeanFactory创建完毕后，所有的bean均为延迟加载。ApplicationContext创建的是立即加载，若要延迟加载，需设置bean的lazy-init="true"