Welcome to the Spring Boot REST API tutorial! This guide will walk you through building a simple RESTful web service using Spring Boot. Let's get started! 📚

🧰 Prerequisites

  • Java Development Kit (JDK 8+)
  • Maven or Gradle
  • IDE (e.g., IntelliJ, Eclipse)
  • Basic understanding of Java and Spring Framework

🛠️ Step-by-Step Guide

1. Create a Spring Boot Project

Use Spring Initializr to generate a project structure. Select the following dependencies:

  • Spring Web
  • Spring Data JPA (optional)
  • Spring Boot DevTools (optional)

📌 Tip: If you're new to Spring Boot, check out our Spring Boot Quick Start tutorial for a basic setup.

2. Define a REST Controller

Create a class annotated with @RestController and @RequestMapping:

@RestController
@RequestMapping("/api")
public class HelloController {
    @GetMapping("/hello")
    public String sayHello() {
        return "Hello, World!";
    }
}

3. Run the Application

Use @SpringBootApplication to launch the app:

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}

4. Test the Endpoint

Open your browser and navigate to:

http://localhost:8080/api/hello

✅ You should see the response: Hello, World!

📌 Additional Resources

📷 Visuals

Spring_Boot
REST_API

Let me know if you'd like to dive deeper into advanced topics like authentication, databases, or Swagger integration! 🌐🔧