how to change Default Embedded Server in spring boot

 how to change Default Embedded Server in spring boot

exclusion of tomcat

==============

<exclusions>

    <exclusion>

      <groupId>org.springframework.boot</groupId>

      <artifactId>spring-boot-starter-tomcat</artifactId>

    </exclusion>

  </exclusions>

undertow server

==========

<dependency>

  <groupId>org.springframework.boot</groupId>

  <artifactId>spring-boot-starter-undertow</artifactId>

</dependency>

jetty server

=========

<dependency>

  <groupId>org.springframework.boot</groupId>

  <artifactId>spring-boot-starter-jetty</artifactId>

</dependency>