Spring Boot Tutorials

• Spring Boot ApplicationRunner
  Spring Boot has two runners, CommandLineRunner and ApplicationRunner with the difference that CommandLineRunner accepts arguments as string array whereas ApplicationRunner accepts arguments as ApplicationArguments. Both are functional interface with a method named as run.
• Spring Boot CommandLineRunner
  Spring CommandLineRunner is a functional interface. The beans created by implementing this interface, run before application startup. It is useful to process some data before application startup. We can create multiple beans using CommandLineRunner and their order can be decided using Ordered interface or @Order annotation.