spring extral features-----GenericApplicationContext

@Test
	public void test1(){
		GenericApplicationContext genericApplicationContext=new GenericApplicationContext();
		
		BeanDefinitionBuilder builder=BeanDefinitionBuilder.rootBeanDefinition(UserServiceImpl.class);

		BeanDefinitionBuilder daoBuilder=BeanDefinitionBuilder.rootBeanDefinition(UserDaoImpl.class);
		
		BeanDefinition definition=daoBuilder.getBeanDefinition();
		
		genericApplicationContext.registerBeanDefinition("userDao", definition);
		
		
		
		builder.addPropertyReference("userDao", "userDao");
		
		genericApplicationContext.registerBeanDefinition("userService", builder.getBeanDefinition());
		
		
		UserService userService=genericApplicationContext.getBean(UserService.class);
		
		userService.save("hotbain", "123456");
		
		genericApplicationContext.close();
		
		
	}

        动态实现bean的加载。