Introduction to Spring Boot

Spring Boot is a project from the Spring ecosystem that simplifies the creation of stand-alone, production-grade Spring applications.

💡 Spring Boot eliminates boilerplate configuration and lets you build applications faster with minimal setup.

Why Use Spring Boot?

• Auto Configuration
• Embedded Web Servers (Tomcat, Jetty)
• Production-Ready Features (Actuator)
• Microservices-Friendly
• Great for REST APIs

Hello Spring Boot

Create a simple REST controller:

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

Application Entry Point

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

application.properties

server.port=8081
spring.application.name=MySpringApp

Dependency Management (Maven)

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
</dependencies>

Key Annotations

• @RestController
• @SpringBootApplication
• @GetMapping, @PostMapping
• @Autowired

Conclusion

With Spring Boot, you can go from nothing to a working REST API in minutes. It’s powerful, flexible, and battle-tested.

🚀 Ready to take off? Try building your first CRUD app with Spring Boot!