How do I change from tomcat to other embedded containers?

Tomcat is the default embedded container when we specify web since spring-boot-starter-web dependency declares spring-boot-starter-tomcat as its dependency.

To change from tomcat to Jetty, we need to remove tomcat dependency by specifying the exclusion in pom.xml if you are using maven.

<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>

After removing the tomcat dependency, the next step is to specify the dependency for jetty.

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

Now build your project using maven and run your application to see that jetty in use.

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