Spring实现Aware接口自定义获取bean的两种方式

@Servicepublic class BeanFactoryHelper implements BeanFactoryAware {
  private static BeanFactory beanFactory;
  @Override
  public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
    this.beanFactory = beanFactory;
  }
  public static Object getBean(String beanName){
　　　　 if(beanFactory == null){
      throw new NullPointerException("BeanFactory is null!");
    }
　　　　 return beanFactory.getBean(beanName); 　　} }

@Service
public class ApplicationContextHelper implements ApplicationContextAware {
  private static ApplicationContext applicationContext;
  @Override
  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    this.applicationContext = applicationContext;
  }
  public static Object getBean(String beanName){
    if(applicationContext == null){
      throw new NullPointerException("ApplicationContext is null!");
    }
    return applicationContext.getBean(beanName);
  }
}

@Test
  public void test() throws SQLException {
    //通过从classpath中加载spring-mybatis.xml实现bean的获取
    ApplicationContext context = new ClassPathXmlApplicationContext("spring-mybatis.xml");
    IUserService userService = (IUserService) context.getBean("userService");
    User user = new User();
    user.setName("test");
    user.setAge(20);
    userService.addUser(user);
  }