springboot 使用外部tomcat启动

package sample.xml;

    import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;
     
    @SuppressWarnings("deprecation")
    public class ServletInitializer extends SpringBootServletInitializer { 
     
        @Override 
        protected SpringApplicationBuilder configure(SpringApplicationBuilder application) { 
            return application.sources(SampleSpringXmlApplication.class); 
        } 
     
    }