The second annotation in the sample code is @enableAutoConfiguration.
This annotation tells Spring Boot how to “guess” how you want To configure Spring. This so-called guessing process is not really guessing, but based on the dependencies you add. When the spring-boot-starter-web dependency is added, Spring will add Tomcat and Spring MVC dependencies. This automatic configuration assumes that you will be deploying a Web application and setting up the Spring framework.
Starters and Auto – configuration
Auto-configuration is used to work well with Spring’s “Starters.”
But if you have other options, your Spring autoconfiguration will try to do that too.
Or you can go with a non-starters reliance. Spring Boot will still try to automatically configure your application.
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