修改启动类即可 

@SpringBootApplication
public class SystemctlApplication {

    public static void main(String[] args) {
        SpringApplicationBuilder builder = new SpringApplicationBuilder(SystemctlApplication.class);
        //SpringApplication.run(SystemctlApplication.class, args);
        builder.headless(false)
               // .web(WebApplicationType.NONE)
               // .bannerMode(Banner.Mode.OFF)
                .run(args);
    }

}

参考
https://stackoverflow.com/questions/51004447/spring-boot-java-awt-headlessexception