java spring boot componentscan


  • What is Spring Boot ComponentScan?

    @ComponentScan
    Spring is a dependency injection framework. It is all about beans and wiring in dependencies. The first step of defining Spring Beans is by adding the right annotation - @Component or @Service or @Repository. However, Spring does not know about the bean unless it knows where to search for it.
  • 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.
  • What is the difference between @component and ComponentScan?

    @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.
  • Using component scan is one method of asking Spring to detect Spring managed components. Spring needs the information to locate and register all the Spring components with the application context when the application starts. Spring can auto scan, detect, and instantiate components from pre-defined project packages.
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