在springboot中排除tomcat，使用其他webserver

excluding tomcat dependencies from springboot in gradle

 implementation ('org.springframework.boot:spring-boot-starter-web'){
        exclude group: 'org.springframework.boot', module: 'spring-boot-starter-tomcat'
    }

    implementation('org.springframework.boot:spring-boot-starter-websocket') {
        exclude  group: 'org.springframework.boot', module: 'spring-boot-starter-tomcat'
    }
    implementation 'org.springframework.boot:spring-boot-starter-undertow'

configurations {
    compile.exclude module: 'spring-boot-starter-tomcat'
    compile.exclude group: 'org.apache.tomcat'
}