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Spring vs Spring Boot

Last Updated : 25 Apr, 2026

Spring and Spring Boot are popular frameworks in the Java ecosystem that simplify the development of enterprise and microservices-based applications. They provide powerful features to reduce boilerplate code and improve productivity while building robust systems.

  • Enables development of scalable and production-ready applications
  • Reduces complexity through simplified configuration and auto-setup
  • Promotes modular design using reusable components

Spring 

Spring is a comprehensive Java framework that provides support for building robust and scalable enterprise applications. It focuses on dependency injection, aspect-oriented programming, and modular architecture.

  • Dependency Injection (DI): Simplifies object creation and management, promoting loose coupling.
  • Modular Framework: Offers various modules like Spring MVC, Spring Security, Spring Data, allowing selective use.
  • Flexible Configuration: Supports XML, annotations, and Java-based configuration for application setup.

Example: Spring application manually configured with beans and controllers:

Explanation: This is a traditional Spring MVC application using Java-based configuration, where beans are defined manually and components are scanned for dependency injection. The application is deployed as a WAR file on an external server like Tomcat, with a controller handling web requests and returning a view.

Spring Boot 

Spring Boot is a project built on top of Spring that simplifies the development of Spring applications by providing auto-configuration, embedded servers, and production-ready features. It is designed to reduce boilerplate code and setup complexity.

  • Auto-Configuration: Automatically configures Spring applications based on the dependencies added.
  • Embedded Servers: Comes with embedded Tomcat, Jetty, or Undertow, eliminating the need for external servers.
  • Starter POMs: Provides ready-to-use dependencies to simplify build configuration.

Example: Spring Boot REST API with minimal configuration:

Explanation: This is a Spring Boot application that uses auto-configuration and an embedded server, so no manual setup or deployment is required. It exposes a REST API that directly returns JSON data instead of rendering a view.

Spring vs Spring Boot

FeatureSpringSpring Boot
PurposeA general framework for building Java applications with flexibility.A streamlined framework for quickly creating production-ready Spring applications.
ConfigurationRequires manual XML or annotation-based configuration.Provides auto-configuration to reduce boilerplate setup.
Setup ComplexityMore complex and time-consuming to set up projects.Simple setup with minimal configuration needed.
Server RequirementNeeds an external server like Tomcat or Jetty.Comes with embedded servers; no external setup required.
Dependency ManagementDevelopers manually manage dependencies.Uses Starter POMs for simplified dependency management.
Learning CurveSteeper due to modular structure and manual configurations.Easier and faster for developers to start and deploy applications.
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