Have you used the Spring framework in developing services in your project?

Yes, Spring is one of the most popular frameworks for Java development. It provides convenient tools for creating web services, managing dependencies (via Spring IoC), handling requests (Spring MVC), working with databases (Spring Data), and integrating with other technologies. Projects often use Spring Boot for quick startup and simplified application configuration.

Example of a simple REST controller in Spring Boot:

@RestController
public class HelloController {
    @GetMapping("/hello")
    public String hello() {
        return "Hello, Spring!";
    }
}