如何在spring boot web应用程序的Bean初始化代码中获取随机http端口？

import org.springframework.boot.context.embedded.EmbeddedServletContainerInitializedEvent;
import org.springframework.context.ApplicationListener;
import org.springframework.stereotype.Component;

@Component
public class RandomPortListener implements ApplicationListener<EmbeddedServletContainerInitializedEvent> {

    private int port;

    @Override
    public void onApplicationEvent(EmbeddedServletContainerInitializedEvent event) {
        port = event.getEmbeddedServletContainer().getPort();
    }

    public int getPort() {
        return port;
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class MyApp {

    @Autowired
    private RandomPortListener randomPortListener;

    public static void main(String[] args) {
        SpringApplication.run(MyApp.class, args);
    }

    public void someMethod() {
        int port = randomPortListener.getPort();
        // 使用获取到的随机HTTP端口进行相关操作
    }
}