参考Java

生成 SDK

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按照本页面的说明生成 Java SDK。

1

Install the Fern CLI

$npm install -g fern-api
2

Initialize the fern folder

Initialize the fern folder with your existing OpenAPI specification, or start from scratch with a Fern Definition template. Specify your organization name using the --organization flag.

$fern init --openapi path/to/openapi.yml \
>--organization <YourOrganization>

OpenAPI accepts both JSON and YAML formats. You can always convert a Fern Definition to OpenAPI or OpenAPI to a Fern Definition later on.

This creates a fern folder in your current directory.

fern
fern.config.json# root-level configuration
api# your API
generators.yml# generators you're using
openapi
openapi.yml# API-level configuration
3

Validate your API definition

Check that your API definition is valid, and fix errors before proceeding:

$fern check

添加 SDK 生成器

运行以下命令将 Java SDK 生成器添加到 generators.yml：

$fern add fern-java-sdk --group {{GROUP_NAME}}

此命令将以下 group 添加到 generators.yml：

generators.yml
1  java-sdk: # 组名称
2    generators:
3      - name: fernapi/fern-java-sdk
4        version: 4.7.0
5        output:
6          location: local-file-system
7          path: ../sdks/java

生成 SDK

运行以下命令生成您的 SDK：

$fern generate --group java-sdk

如果您有多个 API，请使用 --api 标志 指定要生成的 API：

$fern generate --group java-sdk --api your-api-name

This creates a sdks folder in your current directory. The resulting folder structure looks like this:

fern# 由 fern init 创建
sdks# 由 fern generate --group java-sdk 创建
java
YourOrganizationApiClient.java
core
resources
imdb# 或您的 API 名称
errors
types
15

Set up GitHub repositories

Fern uses a multi-repo structure: your source repository contains the fern/ folder, and each SDK gets its own separate repository.

  1. Create a source repository for your fern/ folder if you don’t have one already (e.g., your-org/your-api-definitions).
  2. Create an SDK repository for your SDK (e.g., your-org/your-api-java-sdk).
  3. Install the Fern GitHub App on both repositories.
16

发布到 Maven Central

按照发布到 Maven Central 指南配置您的包并通过 GitHub Actions 设置自动发布。