Why Use Spring Boot?

Why Choose Spring Boot?

Spring Boot brings developer productivity, operational readiness, and a rich ecosystem together. Applications start quickly, scale seamlessly, and integrate with modern cloud infrastructure effortlessly.

• Auto-Configuration – Automatically sets up Spring context based on dependencies.
• Embedded Servers – Run apps without external Tomcat/Jetty installations.
• Starters – Predefined dependencies for REST, JPA, Security, etc.
• Actuator – Health checks, metrics, and monitoring endpoints.
• Microservices Ready – Perfect for containerized and cloud-native deployments.

Spring Boot Web App Architecture

Spring Boot applications usually consist of controllers, services, and repositories. They interact with databases, caching layers, and external APIs, and optionally include asynchronous processing or event-driven microservices.

Client (Browser / Mobile)
          ↕ REST / GraphQL
          API Gateway
          ↕
          Spring Boot Backend
          ├─ Controllers (REST endpoints)
          ├─ Services (Business Logic)
          ├─ Repositories (JPA / DB)
          ├─ Caching (Redis / Ehcache)
          └─ Async / Messaging (Kafka, RabbitMQ)
          Database (Postgres, MySQL) & Cloud Storage
    

Quick REST API Example

Here’s a simple Spring Boot REST controller that exposes endpoints for managing "Products". This demonstrates how quickly you can get a REST service running.

package com.example.demo.controller;
              
              import com.example.demo.model.Product;
              import org.springframework.web.bind.annotation.*;
              
              import java.util.ArrayList;
              import java.util.List;
              
              @RestController
              @RequestMapping("/api/products")
              public class ProductController {
              
                  private List products = new ArrayList<>();
              
                  @GetMapping
                  public List<Product> getAllProducts() {
                      return products;
                  }
              
                  @PostMapping
                  public Product addProduct(@RequestBody Product product) {
                      products.add(product);
                      return product;
                  }
              
                  @GetMapping("/{id}")
                  public Product getProductById(@PathVariable int id) {
                      return products.stream()
                              .filter(p -> p.getId() == id)
                              .findFirst()
                              .orElse(null);
                  }
              }
              

This simple controller illustrates how Spring Boot handles RESTful requests with minimal boilerplate. Combine it with JPA for database persistence, and you have a fully functional backend in minutes.

The flow of a typical Spring Boot REST API is simple yet powerful: Client sends requests → Controller handles HTTP endpoints → Service contains business logic → Repository interacts with the database → Database stores data.

High-Impact Use Cases

• REST APIs – Build stateless services for web or mobile clients.
• Microservices – Independent services with scaling and deployment flexibility.
• Batch Jobs & Scheduling – Automate data processing tasks.
• Security & Auth – OAuth2, JWT, and role-based access control.
• Cloud-Native Apps – Dockerized applications for Kubernetes and serverless platforms.

Tools & Tech Stack

Pros & Cons of Spring Boot

Spring Boot offers a solid foundation for building scalable, maintainable, and cloud-ready Java web applications. By leveraging best practices and modern tooling, developers can accelerate delivery while maintaining high-quality standards.