Springboot获取服务端口

Springboot项目再启动的过程中依次发布的事件为：

class org.springframework.context.event.ContextRefreshedEvent
class org.springframework.boot.web.servlet.context.**ServletWebServerInitializedEvent**
class org.springframework.boot.context.event.ApplicationStartedEvent
class org.springframework.boot.context.event.ApplicationReadyEvent

@Component
public class MyListener implements ApplicationListener<ServletWebServerInitializedEvent> {

    @Override
    public void onApplicationEvent(ServletWebServerInitializedEvent servletWebServerInitializedEvent) {
        int port = servletWebServerInitializedEvent.getWebServer().getPort();
        System.out.println(port);
    }
}