如何在Spring Boot应用程序中排除嵌入式Tomcat

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-tomcat</artifactId>
        </exclusion>
    </exclusions>
</dependency>

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.web.servlet.support.SpringBootServletInitializer;
import org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration;
import org.springframework.boot.web.embedded.jetty.JettyServletWebServerFactory;
import org.springframework.boot.autoconfigure.web.embedded.EmbeddedWebServerFactoryCustomizerAutoConfiguration;

@SpringBootApplication(exclude = { ServletWebServerFactoryAutoConfiguration.class,
        EmbeddedWebServerFactoryCustomizerAutoConfiguration.class })
public class App extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(App.class);
    }

    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(App.class);
        app.run(args);
    }

    public JettyServletWebServerFactory jettyServletWebServerFactory() {
        return new JettyServletWebServerFactory();
    }

}