SpringBoot Docs
Link https://docs.spring.io/spring-boot/docs/current/reference/html/index.html
Spring Boot makes it easy to create stand-alone, production-grade Spring-based Applications that you can run. We take an opinionated view of the Spring platform and third-party libraries, so that you can get started with minimum fuss. Most Spring Boot applications need very little Spring configuration.
You can use Spring Boot to create Java applications that can be started by using java -jar or more traditional war deployments.
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 (such as embedded servers, security, metrics, health checks, and externalized configuration).
- Absolutely no code generation and no requirement for XML configuration.
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 technologies 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 spring-boot-starter-data-jpa dependency in your project.
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spring-boot-starter
Core starter, including auto-configuration support, logging and YAML -
spring-boot-starter-activemq
Starter for JMS messaging using Apache ActiveMQ -
spring-boot-starter-amqp
Starter for using Spring AMQP and Rabbit MQ -
spring-boot-starter-aop
Starter for aspect-oriented programming with Spring AOP and AspectJ -
spring-boot-starter-artemis
Starter for JMS messaging using Apache Artemis -
spring-boot-starter-batch
Starter for using Spring Batch -
spring-boot-starter-cache
Starter for using Spring Framework's caching support -
spring-boot-starter-cloud-connectors
Starter for using Spring Cloud Connectors which simplifies connecting to services in cloud platforms like Cloud Foundry and Heroku. Deprecated in favor of Java CFEnv -
spring-boot-starter-data-cassandra
Starter for using Cassandra distributed database and Spring Data Cassandra -
spring-boot-starter-data-cassandra-reactive
Starter for using Cassandra distributed database and Spring Data Cassandra Reactive -
spring-boot-starter-data-couchbase
Starter for using Couchbase document-oriented database and Spring Data Couchbase -
spring-boot-starter-data-couchbase-reactive
Starter for using Couchbase document-oriented database and Spring Data Couchbase Reactive -
spring-boot-starter-data-elasticsearch
Starter for using Elasticsearch search and analytics engine and Spring Data Elasticsearch -
spring-boot-starter-data-jdbc
Starter for using Spring Data JDBC -
spring-boot-starter-data-jpa
Starter for using Spring Data JPA with Hibernate -
spring-boot-starter-data-ldap
Starter for using Spring Data LDAP -
spring-boot-starter-data-mongodb
Starter for using MongoDB document-oriented database and Spring Data MongoDB -
spring-boot-starter-data-mongodb-reactive
Starter for using MongoDB document-oriented database and Spring Data MongoDB Reactive -
spring-boot-starter-data-neo4j
Starter for using Neo4j graph database and Spring Data Neo4j -
spring-boot-starter-data-redis
Starter for using Redis key-value data store with Spring Data Redis and the Lettuce client -
spring-boot-starter-data-redis-reactive
Starter for using Redis key-value data store with Spring Data Redis reactive and the Lettuce client -
spring-boot-starter-data-rest
Starter for exposing Spring Data repositories over REST using Spring Data REST -
spring-boot-starter-data-solr
Starter for using the Apache Solr search platform with Spring Data Solr -
spring-boot-starter-freemarker
Starter for building MVC web applications using FreeMarker views -
spring-boot-starter-groovy-templates
Starter for building MVC web applications using Groovy Templates views -
spring-boot-starter-hateoas
Starter for building hypermedia-based RESTful web application with Spring MVC and Spring HATEOAS -
spring-boot-starter-integration
Starter for using Spring Integration -
spring-boot-starter-jdbc
Starter for using JDBC with the HikariCP connection pool -
spring-boot-starter-jersey
Starter for building RESTful web applications using JAX-RS and Jersey. An alternative to spring-boot-starter-web -
spring-boot-starter-jooq
Starter for using jOOQ to access SQL databases. An alternative to spring-boot-starter-data-jpa or spring-boot-starter-jdbc -
spring-boot-starter-json
Starter for reading and writing json -
spring-boot-starter-jta-atomikos
Starter for JTA transactions using Atomikos -
spring-boot-starter-jta-bitronix
Starter for JTA transactions using Bitronix -
spring-boot-starter-mail
Starter for using Java Mail and Spring Framework's email sending support -
spring-boot-starter-mustache
Starter for building web applications using Mustache views -
spring-boot-starter-oauth2-client
Starter for using Spring Security's OAuth2/OpenID Connect client features -
spring-boot-starter-oauth2-resource-server
Starter for using Spring Security's OAuth2 resource server features -
spring-boot-starter-quartz
Starter for using the Quartz scheduler -
spring-boot-starter-rsocket
Starter for building RSocket clients and servers. -
spring-boot-starter-security
Starter for using Spring Security -
spring-boot-starter-test
Starter for testing Spring Boot applications with libraries including JUnit, Hamcrest and Mockito -
spring-boot-starter-thymeleaf
Starter for building MVC web applications using Thymeleaf views -
spring-boot-starter-validation
Starter for using Java Bean Validation with Hibernate Validator -
spring-boot-starter-web
Starter for building web, including RESTful, applications using Spring MVC. Uses Tomcat as the default embedded container -
spring-boot-starter-web-services
Starter for using Spring Web Services -
spring-boot-starter-webflux
Starter for building WebFlux applications using Spring Framework's Reactive Web support -
spring-boot-starter-websocket
Starter for building WebSocket applications using Spring Framework's WebSocket support
- spring-boot-starter-actuator
Starter for using Spring Boot's Actuator which provides production ready features to help you monitor and manage your application
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spring-boot-starter-jetty
Starter for using Jetty as the embedded servlet container. An alternative to spring-boot-starter-tomcat -
spring-boot-starter-log4j2
Starter for using Log4j2 for logging. An alternative to spring-boot-starter-logging -
spring-boot-starter-logging
Starter for logging using Logback. Default logging starter -
spring-boot-starter-reactor-netty
Starter for using Reactor Netty as the embedded reactive HTTP server. -
spring-boot-starter-tomcat
Starter for using Tomcat as the embedded servlet container. Default servlet container starter used by spring-boot-starter-web -
spring-boot-starter-undertow
Starter for using Undertow as the embedded servlet container. An alternative to spring-boot-starter-tomcat
Spring Boot favors Java-based configuration. Although it is possible to use SpringApplication with XML sources, we generally recommend that your primary source be a single @Configuration class. Usually the class that defines the main method is a good candidate as the primary @Configuration.
Spring Boot auto-configuration attempts to automatically configure your Spring application based on the jar dependencies that you have added. For example, if HSQLDB is on your classpath, and you have not manually configured any database connection beans, then Spring Boot auto-configures an in-memory database.
You need to opt-in to auto-configuration by adding the @EnableAutoConfiguration or @SpringBootApplication annotations to one of your @Configuration classes. You should only ever add one @SpringBootApplication or @EnableAutoConfiguration annotation. We generally recommend that you add one or the other to your primary @Configuration class only.
You are free to use any of the standard Spring Framework techniques to define your beans and their injected dependencies. For simplicity, we often find that using @ComponentScan (to find your beans) and using @Autowired (to do constructor injection) works well.
If you structure your code as suggested above (locating your application class in a root package), you can add @ComponentScan without any arguments. All of your application components (@Component, @Service, @Repository, @Controller etc.) are automatically registered as Spring Beans.
Many Spring Boot developers like their apps to use auto-configuration, component scan and be able to define extra configuration on their "application class". A single @SpringBootApplication annotation can be used to enable those three features, that is:
@EnableAutoConfiguration: enable Spring Boot's auto-configuration mechanism
@ComponentScan: enable @Component scan on the package where the application is located (see the best practices)
@Configuration: allow to register extra beans in the context or import additional configuration classes
You can run a Spring Boot application from your IDE as a simple Java application. However, you first need to import your project. Import steps vary depending on your IDE and build system. Most IDEs can import Maven projects directly. For example, Eclipse users can select "Import" > "Existing Maven Projects" from the File menu.
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java -jar target/myapplication-0.0.1-SNAPSHOT.jar -
java -Xdebug -Xrunjdwp:server=y,transport=dt_socket,address=8000,suspend=n -jar target/myapplication-0.0.1-SNAPSHOT.jar -
java -jar target/myapplication-0.0.1-SNAPSHOT.jar --server.port=8082
The Spring Boot Maven plugin includes a run goal that can be used to quickly compile and run your application. Applications run in an exploded form, as they do in your IDE. The following example shows a typical Maven command to run a Spring Boot application:
mvnw spring-boot:run
mvnw dependency:tree