普通类中获取bean

spring会帮我们自动注入bean,但如果我们要在普通类中获取bean该如何呢：

@Component
public class SpringUtil implements BeanFactoryAware {

    private static BeanFactory beanFactory;
    @Override
    public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
        SpringUtil.beanFactory = beanFactory;
    }

    public static Object getBean(String beanName){
        return beanFactory.getBean(beanName);
    }
}