public class Application extends SpringBootServletInitializer implements EmbeddedServletContainerCustomizer { 
 
 @Override 
 protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) { 
  return builder.sources(Application.class); 
 } 
  
 public static void main(String[] args) { 
  SpringApplication.run(Application.class, args); 
 } 
 
 
 @Override 
 public void customize(ConfigurableEmbeddedServletContainer container) { 
  container.setPort(8081); 
 } 
}