spring如何在运行时获取接口的实现

@Autowired
private InterfaceName interfaceName;

@Autowired
@Qualifier("implementation1")
private InterfaceName interfaceName;

@Autowired
private ApplicationContext applicationContext;

public void getInterfaceImplementation() {
    InterfaceName interfaceName = applicationContext.getBean(InterfaceName.class);
}

@Autowired
private BeanFactory beanFactory;

public void getInterfaceImplementation() {
    InterfaceName interfaceName = beanFactory.getBean(InterfaceName.class);
}