springboot servletinitializer 的作用

旧版本写法

@Configuration
@EnableScheduling
public class Application{
    public static void main(String[] args) throws Exception {
        SpringApplication.run(Application.class, args);

新版本写法

@Configuration
@EnableAutoConfiguration
public class Application extends SpringBootServletInitializer {   
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(Application.class);
    }