为何要继承SpringBootServletInitializer，为何要实现configure这方法

 1 @SpringBootApplication
 2 @MapperScan({"com.eliansun.mapper"})
 3 @EnableRetry
 4 public class BaseQuartzApplication extends SpringBootServletInitializer {
 5 
 6     public static void main(String[] args) {
 7         SpringApplication.run(BaseQuartzApplication.class, args);
 8     }
 9 
10     @Override
11     protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
12         return builder.sources(BaseQuartzApplication.class);
13     }
14 
15 }