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:
Provide a radically faster and widely accessible getting started experience for all Spring development
Be opinionated out of the box, but get out of the way quickly as requirements start to diverge from the defaults
Provide a range of non-functional features that are common to large classes of projects (e.g. embedded servers, security, metrics, health checks, externalized configuration)
Absolutely no code generation and no requirement for XML configuration
The installation instructions as well as a comprehensive 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); } }
Having trouble with Spring Boot? We’d like to help!
Check the How-to’s — they provide solutions to the most common questions.
Learn the Spring basics — Spring Boot builds on many other Spring projects, check the guides.
Ask a question - we monitor spring-boot. You can also chat
with the community on github.com/spring-projects/spring-boot/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:
Before you log a bug, please search the create a new issue.
Please provide as much information as possible with the issue report, we like to know the version of Spring Boot that you are using, as well as your Operating System and JVM version.
If you need to paste code, or include a stack trace use Markdown ``` escapes before and after your text.
If possible try to create a test-case or project that replicates the problem and attach it to the issue.
You don’t need to build from source to use Spring Boot (binaries in Gradle wrapper. You also need JDK 1.8.
$ ./gradlew publishToMavenLocal
This will build all of the jars and documentation and publish them to your local
Maven cache. It won’t run any of the tests. If you want to build everything, use the
build task:
$ ./gradlew build
Also see CONTRIBUTING.adoc if you wish to submit pull requests,
and in particular please fill out the
Modules
There are a number of modules in Spring Boot, here is a quick overview: The main library providing features that support the other parts of Spring Boot,
these include: The Embedded web applications with a choice of container (Tomcat, Jetty or Undertow) First class externalized configuration support Convenience Spring Boot can configure large parts of common applications based on the content
of their classpath. A single Auto-configuration attempts to deduce which beans a user might need. For example, if
Starters are a set of convenient dependency descriptors that you can include in
your application. You get a one-stop-shop for all the Spring and related technology
that you need without having to hunt through sample code and copy paste loads of
dependency descriptors. For example, if you want to get started using Spring and JPA for
database access include the The Spring command line application compiles and runs Groovy source, allowing you to
write the absolute minimum of code to get an application running. Spring CLI
can also watch files, automatically recompiling and restarting when they change. Actuator endpoints let you monitor and interact with your application.
Spring Boot Actuator provides the infrastructure required for actuator endpoints. It contains
annotation support for actuator endpoints. Out of the box, this module provides a number of endpoints
including the This provides auto-configuration for actuator endpoints based on the content of the classpath and a set of properties.
For instance, if Micrometer is on the classpath, it will auto-configure the This module contains core items and annotations that can be helpful when testing your application. Like other Spring Boot auto-configuration modules, spring-boot-test-autoconfigure, provides auto-configuration
for tests based on the classpath. It includes a number of annotations that can be used to automatically
configure a slice of your application that needs to be tested.
spring-boot
SpringApplication class, providing static convenience methods that can be used
to write a stand-alone Spring Application. Its sole job is to create and refresh an
appropriate Spring ApplicationContextApplicationContext initializers, including support for sensible logging
defaults
spring-boot-autoconfigure
@EnableAutoConfiguration annotation triggers
auto-configuration of the Spring context.HSQLDB is on the classpath, and the user has not configured any database connections,
then they probably want an in-memory database to be defined. Auto-configuration will
always back away as the user starts to define their own beans.
spring-boot-starters
spring-boot-starter-data-jpa dependency in your
project, and you are good to go.
spring-boot-cli
spring-boot-actuator
HealthEndpoint, EnvironmentEndpoint, BeansEndpoint and many more.
spring-boot-actuator-autoconfigure
MetricsEndpoint.
It contains configuration to expose endpoints over HTTP or JMX.
Just like Spring Boot AutoConfigure, this will back away as the user starts to define their own beans.
spring-boot-test
spring-boot-test-autoconfigure
Groovy samples for use with the command line application are available in
spring-boot-cli/samples. To run the CLI samples type
spring run <sample>.groovy from samples directory.
The Building an Application with Spring Boot is a very basic guide that shows you how to create an application, run it and add some management services.
Converting a Spring Boot JAR Application to a WAR shows you how to run applications in a web server as a WAR file.
Spring Boot is Open Source software released under the /reader-opensource/spring-boot