Spring Boot Beginner Code

Corresponds to Modules 1–4 (What is Spring Boot, Setup, First Application, Core Concepts).

Run

./mvnw spring-boot:run

Endpoints

• GET http://localhost:8080/hello — plain text
• GET http://localhost:8080/info — JSON (AppInfo)
• GET http://localhost:8080/greet?name=Student — uses GreetingService

Structure

• DemoApplication.java — main class with @SpringBootApplication
• controller/HelloController.java — REST controller with @RestController, @GetMapping
• dto/AppInfo.java — DTO for JSON response
• service/GreetingService.java — service with constructor injection (DI)