Spring boot profiles :
Many Spring Boot developers like their apps to use auto-configuration, component scan and be able to define extra configuration on their "application class". A single @SpringBootApplication annotation can be used to enable those three features, that is:
@EnableAutoConfiguration: enable Spring Boot’s auto-configuration mechanism@ComponentScan: enable@Componentscan on the package where the application is located (see the best practices)@Configuration: allow to register extra beans in the context or import additional configuration classes
The @SpringBootApplication annotation is equivalent to using @Configuration, @EnableAutoConfiguration, and @ComponentScan with their default attributes,
Spring Boot @SpringBootApplication annotation is used to mark a configuration class that declares one or more @Bean methods and also triggers auto-configuration and component scanning. It’s same as declaring a class with @Configuration, @EnableAutoConfiguration and @ComponentScan annotations.
SpringBootApplication scanBasePackages
By default SpringApplication scans the configuration class package and all it’s sub-pacakges. So if our SpringBootRestApplication class is in com.journaldev.spring.main package, then it won’t scan com.journaldev.spring.controller package. We can fix this situation using SpringBootApplication scanBasePackages property.
@SpringBootApplication(scanBasePackages="com.journaldev.spring")
public class SpringBootRestApplication {
}
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