public class ScheduleController  implements ServletContextListener {

    @Autowired

    private  ScheduleService scheduleService;

    @Override

    public void contextDestroyed(ServletContextEvent event) {

        System.out.println("销毁");

    }

    @Override

    public void contextInitialized(ServletContextEvent event) {

        WebApplicationContextUtils.getRequiredWebApplicationContext(event.getServletContext())

                .getAutowireCapableBeanFactory().autowireBean(this);

        System.out.println("开始执行周期任务");

        scheduleService.start(); ;

    }

}