spring 关闭事件

@Service
public class StopAddDataListener implements ApplicationListener<ContextClosedEvent> {
        private Logger logger= LoggerFactory.getLogger(StartAddDataListener.class);
        @Autowired
        TCPServer  tcpServer;

    @Override
    public void onApplicationEvent(ContextClosedEvent contextClosedEvent) {
        if(contextClosedEvent.getApplicationContext().getParent() == null) {
            NettyStopService nettyStopService = new NettyStopService();
            nettyStopService.setTcpServer(tcpServer);
            new Thread(nettyStopService).start();
        }
    }
}