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Spring Boot 3 Intro

Create a REST Controller​

@RestController
public class FunRestController {
    // expose "/" that returns "Hello World"
    @GetMapping("/")
    public String sayHello() {
        return "Hello World!";
    }
}

Application Properties​

  • You could add custom data to application.properties
# configure server port
server.port=8484

# configure my props
coach.name=Mickey Mouse
team.name=The Mouse Crew
  • The custom data can be used be the controller:
@RestController
public class FunRestController {
    @Value("${coach.name}")
    private String coachName;

    @Value("${team.name}")
    private String teamName;
}