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OpenAPI Generator - Generate Clients, Servers, and Docs from OpenAPI Specs

Automatically generate API client libraries (SDKs), server stubs, API documentation, and configuration files from OpenAPI Specifications (v2 and v3). Supports over 60 languages and frameworks.

Java
Added on 2025年7月4日
View on GitHub
OpenAPI Generator - Generate Clients, Servers, and Docs from OpenAPI Specs preview
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Project Introduction

Summary

OpenAPI Generator is a powerful command-line tool and code generation engine that automates the creation of API clients, server stubs, and documentation from OpenAPI specifications (both v2 and v3). It supports a wide range of languages and frameworks, significantly accelerating API integration and implementation workflows.

Problem Solved

Manually writing and maintaining API client libraries, server stubs, and documentation for different languages and frameworks is repetitive, error-prone, and time-consuming. OpenAPI Generator automates this process, ensuring consistency between the API definition and the generated code.

Core Features

Client SDK Generation

Automatically generates source code for API clients (SDKs) based on an OpenAPI specification.

Server Stub Generation

Generates server-side code stubs and supporting files for various frameworks, allowing quick implementation of API logic.

Documentation Generation

Outputs human-readable API documentation in formats like Markdown or HTML directly from the OpenAPI spec.

Tech Stack

Java
Maven
Gradle
CLI

Use Cases

The OpenAPI Generator is highly valuable in any scenario where you are consuming or providing APIs defined by an OpenAPI specification, across different technology stacks.

Generating API Client Libraries (SDKs)

Details

Given an OpenAPI specification for a REST API, use the generator to produce a client library (SDK) in languages like Java, Python, TypeScript, Swift, Kotlin, etc., to be used in your client application.

User Value

Accelerates frontend, mobile, and backend integration with APIs; provides strongly-typed API interactions; reduces manual coding and potential errors.

Creating Server Stubs for API Implementation

Details

Starting a new API service, use the generator to create server-side code stubs for your chosen framework (e.g., Spring Boot, Node.js Express, Python Flask) based on the API's OpenAPI definition.

User Value

Quickly sets up the basic structure for API endpoints; ensures the server implementation adheres strictly to the defined API contract; saves time on boilerplate code.

Automating API Documentation Generation

Details

Automatically generate up-to-date API documentation in formats like Markdown or HTML directly from your OpenAPI specification file.

User Value

Ensures documentation is always consistent with the latest API definition; reduces the effort required to manually write and maintain documentation; improves developer experience for API consumers.

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