Port binding for Spring RESTful Web Service

I've used the Building a RESTful Web Service tutorial to build a WebService for my purpose. It was quite easy, but now I'm struggeling to configure the port the WebService should be binded through. There is no config.xml or anything to configure in this project. Can anyone give me a hint about how to configure the WebService's port?

As these details might be helpful. I'm starting the server with the code below, containing the @EnableAutoConfiguration tag. The configuration is done by Spring Boot.

@ComponentScan
@EnableAutoConfiguration
public class ServerStarter{

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