Changing the embedded tomcat server in spring boot application?

How to Change the Embedded tomcat server with other embedded Server (Jetty or Undertow) in spring boot application?

I got this question many times and want to provide answer here:

To change the tomcat server with Undertow, replace the following dependencies:

1. Remove the spring-boot-starter-web dependency from pom.xml
   
     <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
     </dependency>

2. Add the following dependencies

Here we will exclude the spring-boot-starter-tomcat dependency from spring-boot starter-web

    <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>
      <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-undertow</artifactId>
      </dependency>

Now Run the application and check the console output, you will see: Undertow started on port(s) 8080: (In my case, it is default port, you can also change the port in application.properties file).

Screenshot:

To change the tomcat server with Jetty, replace the following dependencies:

1. Remove the spring-boot-starter-web dependency from pom.xml
   
     <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
     </dependency>

2. Add the following dependencies

<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>


<dependency>
<groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-jetty</artifactId>
</dependency>

Now Run the application and check the console output, you will see: Jetty started on port(s) 8089 (Port which you have set for server, default port 8080).

Jetty output: