java spring componentscan annotation


  • What does ComponentScan () in Spring indicate?

    With Spring, we use the @ComponentScan annotation along with the @Configuration annotation to specify the packages that we want to be scanned. @ComponentScan without arguments tells Spring to scan the current package and all of its sub-packages.
  • What is @component annotation in Spring?

    @Component is an annotation that allows Spring to detect our custom beans automatically. In other words, without having to write any explicit code, Spring will: Scan our application for classes annotated with @Component. Instantiate them and inject any specified dependencies into them. Inject them wherever needed.
  • What is the difference between @SpringBootApplication and @ComponentScan?

    @SpringBootApplication is a combination of three annotations, @Configuration - for java based configuration classes. @ComponentScan - to enable component scanning, all the packages and subpackages will be auto-scanned which are under the root package on which @SpringBootApplication is applied.
  • @Component and @ComponentScan are for different purposes. @Component indicates that a class might be a candidate for creating a bean. It's like putting a hand up. @ComponentScan is searching packages for Components.
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