Spring Boot:

✅ Q1: How do I change the default embedded server (Tomcat) in Spring Boot to Jetty or Undertow?

✔️ A:
Exclude Tomcat from spring-boot-starter-web and add your preferred server like this (for Jetty):

<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>
 

✅ Q2: What are Spring Boot Actuator features useful for production?

✔️ A:
Spring Boot Actuator provides:

• Metrics: JVM, CPU, HTTP, DB usage (/actuator/metrics)

• Health Checks: Service, DB, disk, etc. (/actuator/health)

• Externalized Config: Control app settings via .properties, YAML, or env vars without code changes.

Enable it with:

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

And expose endpoints: