| Package | Description | 
|---|---|
| org.springframework.boot | Core Spring Boot classes. | 
| org.springframework.boot.admin | Administration support for Spring Boot applications. | 
| org.springframework.boot.ansi | Support classes to provide ANSI color output. | 
| org.springframework.boot.availability | Support for describing the availability of Spring Boot applications. | 
| org.springframework.boot.builder | Fluent 'builder' style API to construct a
  SpringApplication. | 
| org.springframework.boot.cloud | Low level support for Cloud deployments. | 
| org.springframework.boot.context | Classes related to Spring's  ApplicationContext. | 
| org.springframework.boot.context.annotation | Classes related to Spring's  ApplicationContextannotations. | 
| org.springframework.boot.context.config | External configuration support allowing 'application.properties' to be loaded and used
 within a Spring Boot application. | 
| org.springframework.boot.context.event | ApplicationEventstriggered by
 Spring Boot. | 
| org.springframework.boot.context.logging | Logging integration with Spring's Application Context. | 
| org.springframework.boot.context.metrics.buffering | ApplicationStartupimplementation for
 buffering steps and measuring their processing time. | 
| org.springframework.boot.context.properties | Support for external configuration properties. | 
| org.springframework.boot.context.properties.bind | Support for  @ConfigurationPropertiesbinding. | 
| org.springframework.boot.context.properties.bind.handler | General  BindHandlerimplementations. | 
| org.springframework.boot.context.properties.bind.validation | Binding validation support. | 
| org.springframework.boot.context.properties.source | Sources for external configuration properties. | 
| org.springframework.boot.convert | Support for type conversion. | 
| org.springframework.boot.diagnostics | Support for failure analysis and reporting. | 
| org.springframework.boot.diagnostics.analyzer | Internal  FailureAnalyzerimplementations. | 
| org.springframework.boot.env | Spring  Environmentsupport. | 
| org.springframework.boot.info | Support for providing information about an application. | 
| org.springframework.boot.jackson | Custom enhancements and support for the Jackson project. | 
| org.springframework.boot.jdbc | Support for Java Database Connectivity (JDBC). | 
| org.springframework.boot.jdbc.init | Support for initializaton of an SQL database using a JDBC  DataSource. | 
| org.springframework.boot.jdbc.metadata | Support for accessing JDBC  DataSourcemetadata. | 
| org.springframework.boot.jms | Support for Java Message Service (JMS). | 
| org.springframework.boot.json | Support for parsing JSON. | 
| org.springframework.boot.jta.atomikos | Support classes for Atomikos JTA. | 
| org.springframework.boot.logging | Support and abstractions across several logging libraries. | 
| org.springframework.boot.logging.java | Support for 'Java Util Logging'. | 
| org.springframework.boot.logging.log4j2 | Support for the Log4j 2 logging library. | 
| org.springframework.boot.logging.logback | Support for the Logback logging library. | 
| org.springframework.boot.origin | Support for item origin tracking. | 
| org.springframework.boot.orm.jpa | JPA Support classes. | 
| org.springframework.boot.orm.jpa.hibernate | Hibernate Support classes. | 
| org.springframework.boot.r2dbc | Support for R2DBC connectivity. | 
| org.springframework.boot.r2dbc.init | Support for initializaton of an SQL database using an R2DBC
  ConnectionFactory. | 
| org.springframework.boot.reactor | Support classes for Reactor integration. | 
| org.springframework.boot.rsocket.context | RSocket integrations with Spring Framework's
  ApplicationContext. | 
| org.springframework.boot.rsocket.messaging | Support for RSocket-based messaging. | 
| org.springframework.boot.rsocket.netty | Reactor Netty based RSocket server implementation. | 
| org.springframework.boot.rsocket.server | Support for RSocket servers. | 
| org.springframework.boot.security.reactive | Classes and utilities for reactive Spring Security. | 
| org.springframework.boot.security.servlet | Classes and utilities for Servlet-based Spring Security. | 
| org.springframework.boot.sql.init | Support for initializaton of an SQL database. | 
| org.springframework.boot.sql.init.dependency | Infrastructure for establishing database initialization bean dependencies. | 
| org.springframework.boot.system | General system support classes. | 
| org.springframework.boot.task | Utilities and classes related to task execution and scheduling. | 
| org.springframework.boot.type.classreading | Support classes for reading annotation and class-level metadata. | 
| org.springframework.boot.util | Contains miscellaneous utility classes. | 
| org.springframework.boot.validation | Utilities and classes related to validation. | 
| org.springframework.boot.validation.beanvalidation | Utilities and classes related to bean validation. | 
| org.springframework.boot.web.client | Web client utilities. | 
| org.springframework.boot.web.codec | Support for web-based codecs. | 
| org.springframework.boot.web.context | Web integrations with Spring's  ApplicationContext. | 
| org.springframework.boot.web.embedded.jetty | Embedded reactive and servlet web server implementations backed by Jetty. | 
| org.springframework.boot.web.embedded.netty | Embedded reactive web server implementation backed by Netty. | 
| org.springframework.boot.web.embedded.tomcat | Embedded reactive and servlet web server implementations backed by Tomcat. | 
| org.springframework.boot.web.embedded.undertow | Embedded reactive and servlet web server implementations backed by Undertow. | 
| org.springframework.boot.web.error | Spring Web error handling infrastructure. | 
| org.springframework.boot.web.reactive.context | Reactive based web integrations with Spring's
  ApplicationContext. | 
| org.springframework.boot.web.reactive.error | Spring WebFlux error handling infrastructure. | 
| org.springframework.boot.web.reactive.filter | Spring Boot specific  WebFilterimplementations. | 
| org.springframework.boot.web.reactive.function.client | Spring WebFlux WebClient support abstractions. | 
| org.springframework.boot.web.reactive.result.view | Additional  Viewsfor use with
 WebFlux. | 
| org.springframework.boot.web.reactive.server | Reactive web server abstractions. | 
| org.springframework.boot.web.server | Support for embedded web servers. | 
| org.springframework.boot.web.servlet | Classes and utilities designed to work with the `javax.servlet` specification. | 
| org.springframework.boot.web.servlet.context | Servlet based web integrations with Spring's
  WebApplicationContext. | 
| org.springframework.boot.web.servlet.error | Spring MVC error handling infrastructure. | 
| org.springframework.boot.web.servlet.filter | Spring Boot specific  Filterimplementations. | 
| org.springframework.boot.web.servlet.server | Servlet web server abstractions. | 
| org.springframework.boot.web.servlet.support | Support classes for Servlet-based web servers. | 
| org.springframework.boot.web.servlet.view | Additional  Viewsfor use with Web MVC. | 
| org.springframework.boot.webservices.client | Web Services client utilities. |