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IMPORTANT: springdoc-openapi v1.8.0 is the latest Open Source release supporting Spring Boot 2.x and 1.x.

An extended support for springdoc-openapi v1 project is now available for organizations that need support beyond 2023.

For more details, feel free to reach out: [email protected]

springdoc-openapi is on Open Collective. If you ❤️ this project consider becoming a sponsor.

This project is sponsored by

  

Table of Contents

Full documentation

Introduction

The springdoc-openapi Java library helps automating the generation of API documentation using Spring Boot projects. springdoc-openapi works by examining an application at runtime to infer API semantics based on Spring configurations, class structure and various annotations.

The library automatically generates documentation in JSON/YAML and HTML formatted pages. The generated documentation can be complemented using swagger-api annotations.

This library supports:

  • OpenAPI 3
  • Spring-boot v3 (Java 17 & Jakarta EE 9)
  • JSR-303, specifically for @NotNull, @Min, @Max, and @Size.
  • Swagger-ui
  • OAuth 2
  • GraalVM native images

The following video introduces the Library:

For spring-boot v3 support, make sure you use springdoc-openapi v2

This is a community-based project, not maintained by the Spring Framework Contributors (Pivotal)

Getting Started

Library for springdoc-openapi integration with spring-boot and swagger-ui

  • Automatically deploys swagger-ui to a Spring Boot 3.x application
  • Documentation will be available in HTML format, using the official swagger-ui jars.
  • The Swagger UI page should then be available at http://server: port/context-path/swagger-ui.html and the OpenAPI description will be available at the following url for json format: http://server:port/context-path/v3/api-docs
    • server: The server name or IP
    • port: The server port
    • context-path: The context path of the application
  • Documentation can be available in yaml format as well, on the following path: /v3/api-docs.yaml
  • Add the springdoc-openapi-ui library to the list of your project dependencies (No additional configuration is needed):
   <dependency>
      <groupId>org.springdoc</groupId>
      <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
      <version>last-release-version</version>
   </dependency>
  • This step is optional: For custom path of the swagger documentation in HTML format, add a custom springdoc property, in your spring-boot configuration file:
# swagger-ui custom path
springdoc.swagger-ui.path=/swagger-ui.html

Spring-boot with OpenAPI Demo applications.

Source Code for Demo Applications.

Demo Spring Boot 3 Web MVC with OpenAPI 3.

Demo Spring Boot 3 WebFlux with OpenAPI 3.

Demo Spring Boot 3 WebFlux with Functional endpoints OpenAPI 3.

Demo Spring Boot 3 and Spring Cloud Function Web MVC.

Demo Spring Boot 3 and Spring Cloud Function WebFlux.

Demo Spring Boot 3 and Spring Cloud Gateway.

Branching

Integration of the library in a Spring Boot 3.x project without the swagger-ui:

  • Documentation will be available at the following url for json format: http://server: port/context-path/v3/api-docs
    • server: The server name or IP
    • port: The server port
    • context-path: The context path of the application
  • Documentation will be available in yaml format as well, on the following path : /v3/api-docs.yaml
  • Add the library to the list of your project dependencies. (No additional configuration is needed)
   <dependency>
      <groupId>org.springdoc</groupId>
      <artifactId>springdoc-openapi-starter-webmvc-api</artifactId>
      <version>last-release-version</version>
   </dependency>
  • This step is optional: For custom path of the OpenAPI documentation in Json format, add a custom springdoc property, in your spring-boot configuration file:
# /api-docs endpoint custom path
springdoc.api-docs.path=/api-docs
  • This step is optional: If you want to disable springdoc-openapi endpoints, add a custom springdoc property, in your spring-boot configuration file:
# disable api-docs
springdoc.api-docs.enabled=false

Error Handling for REST using @ControllerAdvice

To generate documentation automatically, make sure all the methods declare the HTTP Code responses using the annotation: @ResponseStatus.

Adding API Information and Security documentation

The library uses spring-boot application auto-configured packages to scan for the following annotations in spring beans: OpenAPIDefinition and Info. These annotations declare, API Information: Title, version, licence, security, servers, tags, security and externalDocs. For better performance of documentation generation, declare @OpenAPIDefinition and @SecurityScheme annotations within a Spring managed bean.

spring-webflux support with Annotated Controllers

  • Documentation can be available in yaml format as well, on the following path : /v3/api-docs.yaml
  • Add the library to the list of your project dependencies (No additional configuration is needed)
   <dependency>
      <groupId>org.springdoc</groupId>
      <artifactId>springdoc-openapi-starter-webflux-ui</artifactId>
      <version>last-release-version</version>
   </dependency>
  • This step is optional: For custom path of the swagger documentation in HTML format, add a custom springdoc property, in your spring-boot configuration file:
# swagger-ui custom path
springdoc.swagger-ui.path=/swagger-ui.html

The springdoc-openapi libraries are hosted on maven central repository. The artifacts can be viewed accessed at the following locations:

Releases:

Snapshots:

Acknowledgements

Contributors

springdoc-openapi is relevant and updated regularly due to the valuable contributions from its contributors.

Thanks you all for your support!

Additional Support

  • Spring Team - Thanks for their support by sharing all relevant resources around Spring projects.
  • JetBrains - Thanks a lot for supporting springdoc-openapi project.

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