Run Spring boot application on random port

If you set the property 'server.port' to 0, then the application runs on random free port.

@SpringBootApplication
public class App {
	public static void main(String[] args) {
		System.setProperty("server.port","0");
		SpringApplication.run(App.class, args);
	}	
}

Once you ran App.java, you can see the port details in console messages.

2019-07-18 13:40:14.311  INFO 38037 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 52709 (http) with context path ''

In my case, application started running on port 52709.

If you would like to know different ways to customize the post, I would recommend you to go through the post ‘How to configure port for a spring boot application?’.

You can download the complete working application from this link.

Previous                                                    Next                                                    Home