spring-boot README

The project's README from github.com/spring-projects/spring-boot. As one markdown file: README.md.

= Spring Boot image:https://github.com/spring-projects/spring-boot/actions/workflows/build-and-deploy-snapshot.yml/badge.svg?branch=main["Build Status", link="https://github.com/spring-projects/spring-boot/actions/workflows/build-and-deploy-snapshot.yml?query=branch%3Amain"] image:https://img.shields.io/badge/Revved%20up%20by-Develocity-06A0CE?logo=Gradle&labelColor=02303A["Revved up by Develocity", link="https://ge.spring.io/scans?&search.rootProjectNames=Spring%20Boot%20Build&search.rootProjectNames=spring-boot-build"]

:docs: https://docs.spring.io/spring-boot :github: https://github.com/spring-projects/spring-boot

Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss. It takes an opinionated view of the Spring platform so that new and existing users can quickly get to the bits they need.

You can use Spring Boot to create stand-alone Java applications that can be started using java -jar or more traditional WAR deployments. We also provide a command-line tool that runs Spring scripts.

Our primary goals are:

== Installation and Getting Started

The {docs}[reference documentation] includes detailed {docs}/installing.html[installation instructions] as well as a comprehensive {docs}/tutorial/first-application/index.html[getting started] guide.

Here is a quick teaser of a complete Spring Boot application in Java:

[source,java]

import org.springframework.boot.; import org.springframework.boot.autoconfigure.; import org.springframework.web.bind.annotation.*;

@RestController @SpringBootApplication public class Example {

@RequestMapping("/")
String home() {
	return "Hello World!";
}

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

}

== Getting Help

Are you having trouble with Spring Boot? We want to help!

== Contributing

We welcome contributions of all kinds! Please read our link:CONTRIBUTING.adoc[contribution guidelines] before submitting a pull request.

== Reporting Issues

Spring Boot uses GitHub's integrated issue tracking system to record bugs and feature requests. If you want to raise an issue, please follow the recommendations below:

== Building from Source

You don't need to build from source to use Spring Boot. If you want to try out the latest and greatest, Spring Boot can be built and published to your local Maven cache using the https://docs.gradle.org/current/userguide/gradle_wrapper.html[Gradle wrapper]. You also need JDK 25.

[source,shell]

$ ./gradlew publishToMavenLocal

This command builds all modules and publishes them to your local Maven cache. It won't run any of the tests. If you want to build everything, use the build task:

[source,shell]

$ ./gradlew build

== Guides

The https://spring.io/[spring.io] site contains several guides that show how to use Spring Boot step-by-step:

== License

Spring Boot is Open Source software released under the https://www.apache.org/licenses/LICENSE-2.0.html[Apache 2.0 license].

spring-boot (spring-projects/spring-boot)

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What is this?Spring Boot is a Java framework that helps you create production-grade, Spring-powered applications and services with minimal configuration fuss.
Is this a framework I add to a Java project, or a separate app I run?It's a Java framework/library you add to your build via Maven or Gradle; your own code sits on top of it and compiles into a runnable standalone jar or a traditional WAR.
How do I add Spring Boot to a project?Follow the reference documentation's installation instructions, add the Spring Boot starter dependencies with Maven or Gradle, then run the app with 'java -jar' or deploy it as a WAR; a 'first application' tutorial walks you through it from scratch.
Does Spring Boot generate code or require XML configuration?No — it explicitly avoids code generation and doesn't require any XML configuration, relying instead on sensible opinionated defaults that you can override.
What does Spring Boot give me out of the box?It bundles common production-ready features like embedded servers, security, metrics, health checks, and externalized configuration so you don't have to wire them up yourself.
Can I run a Spring Boot app as a standalone jar?Yes, thanks to embedded server support you package your app and run it directly with 'java -jar yourapp.jar' without needing an external servlet container.
Is there a command-line tool for Spring Boot?Yes, Spring Boot ships with a CLI tool that can run Spring scripts directly.
Why would I use Spring Boot instead of plain Spring?It gives you a radically faster getting-started experience by being opinionated about defaults, while still letting you diverge from them as your requirements grow.
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