Spring Boot default app structure and component scan

I’m familiar with the Spring Framework’s concept of a ‘component scan’ to find its managed beans when the app initializes, but was looking for how to configure the package(s) for the component scan in a Spring Boot app.

Turns out (see docs here), by convention if your main app class annotated with @SpringBootApplication and is in a package with all your code in packages below this point, then those subpackages are scanned by default.

Here’s a simple Spring Boot app class:

[code]

package kh.simplespringboot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {

public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}

[/code]

All packages below kh.simplespringboot in the example by default will be scanned for Spring components.