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(); ; 
    } 
}