Spring Boot Hello World Tutorial - GetMapping REST API

Learn How to get started with Spring boot framework. Create your very first REST API using Spring Boot and the @RestController  @GetMapping annotation. Whether you're new to Java development or just getting started with Spring Boot, this step-by-step guide will help you understand the core concepts and build a simple "Hello World" RESTful API.

Go to Spring Initializer https://start.spring.io/

and fill out the following details similar to below image and add Spring web dependency

HelloController.java - Create new package and new class and add the following code into that class

package com.hakeemit.hello.controller;

import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @GetMapping("/hello")
    public String hello(){
        return "Hello World";
    }
}

Your project structure will look like this 

Once you run the application. Go to http://localhost:8080/hello and you will be able to see the Hello World in the web browser.

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