Spring Boot simplifies the process of building production-ready applications with the Spring Framework. In this guide, we’ll walk through creating your first Spring Boot application step by step.
Spring Boot simplifies the process of building production-ready applications with the Spring Framework. In this guide, we’ll walk through creating your first Spring Boot application step by step.
In this section, we clarify What you'll learn and summarize the key points you will apply in implementation.
📋 Before starting, ensure you have the following:
You can create your first Spring Boot project in two ways:
MavenJava or Kotlin3.0.0 (or the latest version).Spring WebNew Project > Spring Initializr.Let’s write a simple endpoint to say hello:
In this section, we clarify Step 3: Run the Application and summarize the key points you will apply in implementation.
./mvnw spring-boot:run
http://localhost:8080/hello
Response:
Hello, Spring Boot!
You now have a practical Spring Boot - First Application implementation with a clear, production-friendly Spring Boot structure. As a next step, adapt configuration and tests to your own domain, then validate behavior under realistic traffic and failure scenarios.
package com.example.demo; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; @SpringBootApplication @RestController public class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); } @GetMapping("/hello") public String sayHello() { return "Hello, Spring Boot!"; } }
package com.example.demo import org.springframework.boot.autoconfigure.SpringBootApplication import org.springframework.boot.runApplication import org.springframework.web.bind.annotation.GetMapping import org.springframework.web.bind.annotation.RestController @SpringBootApplication @RestController class DemoApplication fun main(args: Array<String>) { runApplication<DemoApplication>(*args) } @GetMapping("/hello") fun sayHello(): String { return "Hello, Spring Boot!" }