找不到bean

Posted 2022-11-05 IT的鱼

implements  ApplicationListener<ContextRefreshedEvent>

      private static ApplicationContext context;


   @Override
    public void onApplicationEvent(ContextRefreshedEvent event) 
        context = event.getApplicationContext();
    

    public static Object getBean(Class beanName) 
        return context != null ? context.getBean(beanName) : null;
    

       DeviceService deviceService = (DeviceService) NettyUdpServerHandler.getBean(DeviceService.class);