NOTE: version 2.X (io.swagger
) and 3.X (io.swagger.codegen.v3
) have different group ids.
2.X and 3.X version lines of Swagger Codegen are available; 2.X (master
branch) supports Swagger/OpenAPI version 2,
while 3.X (3.0.0
branch) supports OpenAPI version 3 (and version 2 via spec conversion to version 3).
Online generator of version 3.X supports both generation from Swagger/OpenAPI version 2 (by using engine + generators of 2.X) and version 3 specifications.
NOTE: this document refers to version 3.X, check here for 2.X.
Swagger Codegen 3.X (3.0.0
branch)
Swagger Codegen 2.X supports OpenAPI version 3 (and version 2 via spec conversion to version 3) Online generator of version 3.X supports both generation from Swagger/OpenAPI version 2 (by using engine + generators of 2.X) and version 3 specifications.
group id: io.swagger.codegen.v3
maven central: https://mvnrepository.com/artifact/io.swagger.codegen.v3
dependency example:
<dependency>
<groupId>io.swagger.codegen.v3</groupId>
<artifactId>swagger-codegen-maven-plugin</artifactId>
<version>3.0.50</version>
</dependency>
Swagger Codegen 2.X (master
branch)
Swagger Codegen 2.X supports Swagger/OpenAPI version 2.
group id: io.swagger
maven central (maven plugin): https://mvnrepository.com/artifact/io.swagger/swagger-codegen-maven-plugin
dependency example:
<dependency>
<groupId>io.swagger</groupId>
<artifactId>swagger-codegen-maven-plugin</artifactId>
<version>2.4.36</version>
</dependency>
This is the Swagger Codegen project, which allows generation of API client libraries (SDK generation), server stubs and documentation automatically given an OpenAPI Definition. Currently, the following languages/frameworks are supported:
- API clients: Java (Jersey1.x, Jersey2.x, OkHttp, Retrofit1.x, Retrofit2.x, Feign, RestTemplate, RESTEasy, Vertx, Google API Client Library for Java)
- Server stubs: Java (Inflector)
- API documentation generators: HTML, Confluence Wiki
- Configuration files: Apache2
- Others: JMeter
Check out OpenAPI Specification for additional information about the OpenAPI project.
- Swagger Code Generator
- Overview
- Table of Contents
- Installation
- Getting Started
- Generators
- To generate a sample client library
- Generating libraries from your server
- Modifying the client library format
- Making your own codegen modules
- Generating a client from local files
- Customizing the generator
- Validating your OpenAPI Spec
- Generating dynamic html api documentation
- To build a server stub
- To build the codegen library
- Workflow Integration
- Github Integration
- Online Generators
- Guidelines for Contribution
- License
The OpenAPI Specification has undergone 3 revisions since initial creation in 2010.. The Swagger Codegen project has the following compatibilities with the OpenAPI Specification:
Swagger Codegen Version | Release Date | OpenAPI Spec compatibility | Notes |
---|---|---|---|
3.0.51-SNAPSHOT (current 3.0.0, upcoming minor release) SNAPSHOT | TBD | 1.0, 1.1, 1.2, 2.0, 3.0 | Minor release |
3.0.50 (current stable) | 2023-10-26 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.50 |
3.0.49 | 2023-10-23 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.49 |
3.0.48 | 2023-10-19 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.48 |
3.0.47 | 2023-10-02 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.47 |
3.0.46 | 2023-06-07 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.46 |
3.0.45 | 2023-06-02 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.45 |
3.0.44 | 2023-05-23 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.44 |
3.0.43 | 2023-05-17 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.43 |
3.0.42 | 2023-04-05 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.42 |
3.0.41 | 2023-02-16 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.41 |
3.0.40 | 2023-01-27 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.40 |
3.0.39 | 2023-01-25 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.39 |
3.0.38 | 2023-01-22 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.38 |
3.0.37 | 2023-01-19 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.37 |
3.0.36 | 2022-11-10 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.36 |
3.0.35 | 2022-08-15 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.35 |
3.0.34 | 2022-04-12 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.34 |
3.0.33 | 2022-02-07 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.33 |
3.0.32 | 2022-01-11 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.32 |
3.0.31 | 2021-12-28 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.31 |
3.0.30 | 2021-11-18 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.30 |
3.0.29 | 2021-10-05 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.29 |
3.0.28 | 2021-09-30 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.28 |
3.0.27 | 2021-06-28 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.27 |
3.0.26 | 2021-05-28 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.26 |
3.0.25 | 2021-03-04 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.25 |
3.0.24 | 2020-12-29 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.24 |
3.0.23 | 2020-11-02 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.23 |
3.0.22 | 2020-10-05 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.22 |
3.0.21 | 2020-07-28 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.21 |
3.0.20 | 2020-05-18 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.20 |
3.0.19 | 2020-04-02 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.19 |
3.0.18 | 2020-02-26 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.18 |
3.0.17 | 2020-02-23 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.17 |
3.0.17 | 2020-01-15 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.16 |
3.0.15 | 2020-01-03 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.15 |
3.0.14 | 2019-11-16 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.14 |
3.0.13 | 2019-10-16 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.13 |
3.0.12 | 2019-10-14 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.12 |
3.0.11 | 2019-08-24 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.11 |
3.0.10 | 2019-07-11 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.10 |
3.0.9 | 2019-06-28 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.9 |
3.0.8 | 2019-04-25 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.8 |
3.0.7 | 2019-03-26 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.7 |
3.0.5 | 2019-02-18 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.5 |
3.0.4 | 2019-01-16 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.4 |
3.0.3 | 2018-11-30 | 1.0, 1.1, 1.2, 2.0, 3.0 | tag v3.0.3 |
3.0.2 | 2018-10-19 | 1.0, 1.1, 1.2, 2.0, 3.0 | Minor release |
3.0.1 | 2018-10-05 | 1.0, 1.1, 1.2, 2.0, 3.0 | Major release with breaking changes |
3.0.0 | 2018-09-06 | 1.0, 1.1, 1.2, 2.0, 3.0 | Major release with breaking changes |
2.4.37-SNAPSHOT (current master, upcoming minor release) SNAPSHOT | TBD | 1.0, 1.1, 1.2, 2.0 | Minor release |
2.4.36 (current stable) | 2023-10-26 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.36 |
2.4.35 | 2023-10-26 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.35 |
2.4.34 | 2023-10-19 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.34 |
2.4.33 | 2023-10-02 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.33 |
2.4.32 | 2023-05-17 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.32 |
2.4.31 | 2023-04-02 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.31 |
2.4.30 | 2023-02-16 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.30 |
2.4.29 | 2022-11-10 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.29 |
2.4.28 | 2022-08-15 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.28 |
2.4.27 | 2022-04-12 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.27 |
2.4.26 | 2022-02-07 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.26 |
2.4.25 | 2021-12-28 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.25 |
2.4.24 | 2021-11-18 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.24 |
2.4.23 | 2021-10-08 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.23 |
2.4.22 | 2021-09-30 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.22 |
2.4.21 | 2021-06-28 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.21 |
2.4.20 | 2021-05-28 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.20 |
2.4.19 | 2021-03-04 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.19 |
2.4.18 | 2020-12-29 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.18 |
2.4.17 | 2020-11-02 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.17 |
2.4.16 | 2020-10-05 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.16 |
2.4.15 | 2020-07-28 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.15 |
2.4.14 | 2020-05-18 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.14 |
2.4.13 | 2020-04-02 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.13 |
2.4.12 | 2020-01-15 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.12 |
2.4.11 | 2020-01-03 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.11 |
2.4.10 | 2019-11-16 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.10 |
2.4.9 | 2019-10-14 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.9 |
2.4.8 | 2019-08-24 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.8 |
2.4.7 | 2019-07-11 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.7 |
2.4.6 | 2019-06-28 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.6 |
2.4.5 | 2019-04-25 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.5 |
2.4.4 | 2019-03-26 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.4 |
2.4.2 | 2019-02-18 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.2 |
2.4.1 | 2019-01-16 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.1 |
2.4.0 | 2018-11-30 | 1.0, 1.1, 1.2, 2.0 | tag v2.4.0 |
2.3.1 | 2018-01-17 | 1.0, 1.1, 1.2, 2.0 | tag v2.3.1 |
2.3.0 | 2017-12-21 | 1.0, 1.1, 1.2, 2.0 | tag v2.3.0 |
2.2.3 | 2017-07-15 | 1.0, 1.1, 1.2, 2.0 | tag v2.2.3 |
2.2.2 | 2017-03-01 | 1.0, 1.1, 1.2, 2.0 | tag v2.2.2 |
2.2.1 | 2016-08-07 | 1.0, 1.1, 1.2, 2.0 | tag v2.2.1 |
2.1.6 | 2016-04-06 | 1.0, 1.1, 1.2, 2.0 | tag v2.1.6 |
2.0.17 | 2014-08-22 | 1.1, 1.2 | tag v2.0.17 |
1.0.4 | 2012-04-12 | 1.0, 1.1 | tag v1.0.4 |
If you're looking for the latest stable version, you can grab it directly from Maven.org (Java 8 runtime at a minimum):
wget https://repo1.maven.org/maven2/io/swagger/codegen/v3/swagger-codegen-cli/3.0.50/swagger-codegen-cli-3.0.50.jar -O swagger-codegen-cli.jar
java -jar swagger-codegen-cli.jar --help
For Windows users, you will need to install wget or you can use Invoke-WebRequest in PowerShell (3.0+), e.g. Invoke-WebRequest -OutFile swagger-codegen-cli.jar https://repo1.maven.org/maven2/io/swagger/codegen/v3/swagger-codegen-cli/3.0.50/swagger-codegen-cli-3.0.50.jar
On a mac, it's even easier with brew
:
brew install swagger-codegen
To build from source, you need the following installed and available in your $PATH:
Don't forget to install Java 8.
Export JAVA_HOME in order to use the supported Java version:
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
export PATH=${JAVA_HOME}/bin:$PATH
After cloning the project, you can build it from source with this command:
mvn clean package
To install, run brew install swagger-codegen
Here is an example usage:
swagger-codegen generate -i https://petstore.swagger.io/v2/swagger.json -l ruby -o /tmp/test/
You can use run-in-docker.sh
to do all development. This script maps your local repository to /gen
in the docker container. It also maps ~/.m2/repository
to the appropriate container location.
To execute mvn package
:
git clone https://github.com/swagger-api/swagger-codegen
cd swagger-codegen
./run-in-docker.sh mvn package
Build artifacts are now accessible in your working directory.
Once built, run-in-docker.sh
will act as an executable for swagger-codegen-cli. To generate code, you'll need to output to a directory under /gen
(e.g. /gen/out
). For example:
./run-in-docker.sh help # Executes 'help' command for swagger-codegen-cli
./run-in-docker.sh langs # Executes 'langs' command for swagger-codegen-cli
./run-in-docker.sh /gen/bin/go-petstore.sh # Builds the Go client
./run-in-docker.sh generate -i modules/swagger-codegen/src/test/resources/2_0/petstore.yaml \
-l go -o /gen/out/go-petstore -DpackageName=petstore # generates go client, outputs locally to ./out/go-petstore
See standalone generator development
Prerequisite: install Vagrant and VirtualBox.
git clone https://github.com/swagger-api/swagger-codegen.git
cd swagger-codegen
vagrant up
vagrant ssh
cd /vagrant
./run-in-docker.sh mvn package
- https://hub.docker.com/r/swaggerapi/swagger-generator-v3/ (official web service)
- https://hub.docker.com/r/swaggerapi/swagger-generator-v3-root/ (official web service with "standard" user)
- https://hub.docker.com/r/swaggerapi/swagger-generator-v3-minimal/ (official minimal web service)
- https://hub.docker.com/r/swaggerapi/swagger-codegen-cli-v3/ (official CLI)
See also online generators The Swagger Generator image provides a ready to use web application (swagger-generator) providing code generation services.
Image accepts the following env variables:
JAVA_MEM
e.g.1024m
HTTP_PORT
e.g.8080
HIDDEN_OPTIONS_PATH
(alternative toHIDDEN_OPTIONS
): useful if attaching a volume containing ahiddenOptions.yaml
file definining which languages to hide. e.g./data/hiddenOptions.yaml
HIDDEN_OPTIONS
(alternative toHIDDEN_OPTIONS_PATH
): allows to pass hidden options as an env variable, in the format{category}:{language},{language},{language}|{category}:{language},{language},{language}
e.g.servers:foo,bar|clientsV3:wtf,isthis
where category can beclients
,servers
,clientsV3
,serversV3
An example of running the container:
docker pull swaggerapi/swagger-generator-v3
docker run -e "HIDDEN_OPTIONS=servers:foo,bar|clientsV3:fgf,sdsd" -e "JAVA_MEM=1024m" -e "HTTP_PORT=80" -p 80:80 --name swagger-generator-v3 -v /tmp:/jetty_home/lib/shared swaggerapi/swagger-generator-v3
or
docker run -e "HIDDEN_OPTIONS_PATH=/hiddenOptions.yaml" -e "JAVA_MEM=1024m" -e "HTTP_PORT=80" -p 80:80 --name swagger-generator-v3 -v /tmp:/jetty_home/lib/shared swaggerapi/swagger-generator-v3
This docker image supports custom generators by dropping the generator jar into /jetty_home/lib/shared
directory (typically via a docker volume); e.g having on host /my/custom/coolgenerator.jar
and /my/custom/weirdgenerator.jar
the following would have them added to generator service generators:
docker run -e "HIDDEN_OPTIONS_PATH=/hiddenOptions.yaml" -e "JAVA_MEM=1024m" -e "HTTP_PORT=80" -p 80:80 --name swagger-generator-v3 -v /my/custom:/jetty_home/lib/shared swaggerapi/swagger-generator-v3
Please note that up to version 3.0.20 you need to provide-v /{WHATEVER_DIR}:/jetty_home/lib/shared
even if not using custom generators.
See also online generators
The Swagger Generator "Minimal" image can act as a self-hosted web application and API for generating code.
This container can be incorporated into a CI pipeline, and requires some docker orchestration to access generated code.
Example usage:
# Start container and save the container id
CID=$(docker run -d swaggerapi/swagger-generator-v3-minimal)
# allow for startup
sleep 5
# Get the IP of the running container
GEN_IP=$(docker inspect --format '{{.NetworkSettings.IPAddress}}' $CID)
# Execute an HTTP request and store the download link
curl -X POST \
https://localhost:8080/api/generate \
-H 'content-type: application/json' \
-d '{
"specURL" : "https://raw.githubusercontent.com/OAI/OpenAPI-Specification/master/examples/v3.0/petstore.yaml",
"lang" : "jaxrs-jersey",
"type" : "SERVER",
"codegenVersion" : "V3"
}' > result.zip
# Shutdown the swagger generator image
docker stop $CID && docker rm $CID
In the example above, result.zip
will contain the generated client.
The Swagger Codegen image acts as a standalone executable. It can be used as an alternative to installing via homebrew, or for developers who are unable to install Java or upgrade the installed version.
To generate code with this image, you'll need to mount a local location as a volume.
Example:
docker run --rm -v ${PWD}:/local swaggerapi/swagger-codegen-cli-v3 generate \
-i https://petstore.swagger.io/v2/swagger.json \
-l go \
-o /local/out/go
The generated code will be located under ./out/go
in the current directory.
To generate a PHP client for https://petstore.swagger.io/v2/swagger.json, please run the following
git clone https://github.com/swagger-api/swagger-codegen
cd swagger-codegen
git checkout 3.0.0
mvn clean package
java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate \
-i https://petstore.swagger.io/v2/swagger.json \
-l php \
-o /var/tmp/php_api_client
(if you're on Windows, replace the last command with java -jar modules\swagger-codegen-cli\target\swagger-codegen-cli.jar generate -i https://petstore.swagger.io/v2/swagger.json -l php -o c:\temp\php_api_client
)
You can also download the JAR (latest release) directly from maven.org
To get a list of general options available, please run java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate --help
To get a list of PHP specified options (which can be passed to the generator with a config file via the -c
option), please run java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar config-help -l php
You can build a client against the swagger sample petstore API as follows:
./bin/java-petstore.sh
(On Windows, run .\bin\windows\java-petstore.bat
instead)
This will run the generator with this command:
java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate \
-i https://petstore.swagger.io/v2/swagger.json \ # The location of the Swagger specifcation file (JSON/YAML).
-l java \ # The desired language for the library.
-o samples/client/petstore/java # The output destination.
with a number of options. You can get the options with the generate --help
command (below only shows partal results):
NAME
swagger-codegen-cli generate - Generate code with chosen lang
SYNOPSIS
swagger-codegen-cli generate
[(-a <authorization> | --auth <authorization>)]
[--additional-properties <additional properties>...]
[--api-package <api package>] [--artifact-id <artifact id>]
[--artifact-version <artifact version>]
[(-c <configuration file> | --config <configuration file>)]
[-D <system properties>...] [--git-repo-id <git repo id>]
[--git-user-id <git user id>] [--group-id <group id>]
[--http-user-agent <http user agent>]
(-i <spec file> | --input-spec <spec file>)
[--ignore-file-override <ignore file override location>]
[--import-mappings <import mappings>...]
[--instantiation-types <instantiation types>...]
[--invoker-package <invoker package>]
(-l <language> | --lang <language>)
[--language-specific-primitives <language specific primitives>...]
[--library <library>] [--model-name-prefix <model name prefix>]
[--model-name-suffix <model name suffix>]
[--model-package <model package>]
[(-o <output directory> | --output <output directory>)]
[--release-note <release note>] [--remove-operation-id-prefix]
[--reserved-words-mappings <reserved word mappings>...]
[(-s | --skip-overwrite)]
[(-t <template directory> | --template-dir <template directory>)]
[--type-mappings <type mappings>...] [(-v | --verbose)]
OPTIONS
-a <authorization>, --auth <authorization>
adds authorization headers when fetching the swagger definitions
remotely. Pass in a URL-encoded string of name:header with a comma
separating multiple values
...... (results omitted)
-v, --verbose
verbose mode
You can then compile and run the client, as well as unit tests against it:
cd samples/client/petstore/java
mvn package
Other languages have petstore samples, too:
./bin/android-petstore.sh
./bin/java-petstore.sh
./bin/objc-petstore.sh
It's just as easy--just use the -i
flag to point to either a server or file.
Don't like the default swagger client syntax? Want a different language supported? No problem! Swagger Codegen processes handlebar templates with the Handlebars.java engine. You can modify our templates or make your own.
You can look at swagger-codegen-generators for examples. To make your own templates, create your own files and use the -t
flag to specify your template folder. It actually is that easy.
If you're starting a project with a new language and don't see what you need, Swagger Codegen can help you create a project to generate your own libraries:
java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar meta \
-o output/myLibrary -n myClientCodegen -p com.my.company.codegen
This will write, in the folder output/myLibrary
, all the files you need to get started, including a `README.md. Once modified and compiled, you can load your library with the codegen and generate clients with your own, custom-rolled logic.
You would then compile your library in the output/myLibrary
folder with mvn package
and execute the codegen like such:
java -cp output/myLibrary/target/myClientCodegen-swagger-codegen-1.0.0.jar:modules/swagger-codegen-cli/target/swagger-codegen-cli.jar io.swagger.codegen.v3.cli.SwaggerCodegen
For Windows users, you will need to use ;
instead of :
in the classpath, e.g.
java -cp output/myLibrary/target/myClientCodegen-swagger-codegen-1.0.0.jar;modules/swagger-codegen-cli/target/swagger-codegen-cli.jar io.swagger.codegen.v3.cli.SwaggerCodegen
Note the myClientCodegen
is an option now, and you can use the usual arguments for generating your library:
java -cp output/myLibrary/target/myClientCodegen-swagger-codegen-1.0.0.jar:modules/swagger-codegen-cli/target/swagger-codegen-cli.jar \
io.swagger.codegen.v3.cli.SwaggerCodegen generate -l myClientCodegen\
-i https://petstore.swagger.io/v2/swagger.json \
-o myClient
See also standalone generator development
If you don't want to call your server, you can save the OpenAPI Spec files into a directory and pass an argument to the code generator like this:
-i ./modules/swagger-codegen/src/test/resources/2_0/petstore.json
Great for creating libraries on your ci server, from the Swagger Editor... or while coding on an airplane.
You may not want to generate all models in your project. Likewise you may want just one or two apis to be written. If that's the case, you can use system properties to control the output:
The default is generate everything supported by the specific library. Once you enable a feature, it will restrict the contents generated:
# generate only models
java -Dmodels {opts}
# generate only apis
java -Dapis {opts}
# generate only supporting files
java -DsupportingFiles
# generate models and supporting files
java -Dmodels -DsupportingFiles
To control the specific files being generated, you can pass a CSV list of what you want:
# generate the User and Pet models only
-Dmodels=User,Pet
# generate the User model and the supportingFile `StringUtil.java`:
-Dmodels=User -DsupportingFiles=StringUtil.java
To control generation of docs and tests for api and models, pass false to the option. For api, these options are -DapiTests=false
and -DapiDocs=false
. For models, -DmodelTests=false
and -DmodelDocs=false
.
These options default to true and don't limit the generation of the feature options listed above (like -Dapi
):
# generate only models (with tests and documentation)
java -Dmodels {opts}
# generate only models (with tests but no documentation)
java -Dmodels -DmodelDocs=false {opts}
# generate only User and Pet models (no tests and no documentation)
java -Dmodels=User,Pet -DmodelTests=false {opts}
# generate only apis (without tests)
java -Dapis -DapiTests=false {opts}
# generate only apis (modelTests option is ignored)
java -Dapis -DmodelTests=false {opts}
When using selective generation, only the templates needed for the specific generation will be used.
Swagger Codegen supports a .swagger-codegen-ignore
file, similar to .gitignore
or .dockerignore
you're probably already familiar with.
The ignore file allows for better control over overwriting existing files than the --skip-overwrite
flag. With the ignore file, you can specify individual files or directories can be ignored. This can be useful, for example if you only want a subset of the generated code.
Examples:
# Swagger Codegen Ignore
# Lines beginning with a # are comments
# This should match build.sh located anywhere.
build.sh
# Matches build.sh in the root
/build.sh
# Exclude all recursively
docs/**
# Explicitly allow files excluded by other rules
!docs/UserApi.md
# Recursively exclude directories named Api
# You can't negate files below this directory.
src/**/Api/
# When this file is nested under /Api (excluded above),
# this rule is ignored because parent directory is excluded by previous rule.
!src/**/PetApiTests.cs
# Exclude a single, nested file explicitly
src/IO.Swagger.Test/Model/AnimalFarmTests.cs
The .swagger-codegen-ignore
file must exist in the root of the output directory.
Upon first code generation, you may also pass the CLI option --ignore-file-override=/path/to/ignore_file
for greater control over generated outputs. Note that this is a complete override, and will override the .swagger-codegen-ignore
file in an output directory when regenerating code.
Editor support for .swagger-codegen-ignore
files is available in IntelliJ via the .ignore plugin.
There are different aspects of customizing the code generator (located in this version at swagger codegen generator repo) beyond just creating or modifying templates. Each language has a supporting configuration file to handle different type mappings, etc:
at https://github.com/swagger-api/swagger-codegen-generators/tree/master/src/main/java/io/swagger/codegen/languages/java/
AbstractJavaCodegen.java
AbstractJavaJAXRSServerCodegen.java
...
JavaClientCodegen.java
JavaJAXRSSpecServerCodegen.java
Each of these files creates reasonable defaults so you can get running quickly. But if you want to configure package names, prefixes, model folders, etc. you can use a json config file to pass the values.
java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate \
-i https://petstore.swagger.io/v2/swagger.json \
-l java \
-o samples/client/petstore/java \
-c path/to/config.json
and config.json
contains the following as an example:
{
"apiPackage" : "petstore"
}
Supported config options can be different per language. Running config-help -l {lang}
will show available options.
These options are applied via configuration file (e.g. config.json) or by passing them with -D{optionName}={optionValue}
. (If -D{optionName}
does not work, please open a ticket and we'll look into it)
java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar config-help -l java
Output
CONFIG OPTIONS
modelPackage
package for generated models
apiPackage
package for generated api classes
...... (results omitted)
library
library template (sub-template) to use:
jersey1 - HTTP client: Jersey client 1.18. JSON processing: Jackson 2.4.2
jersey2 - HTTP client: Jersey client 2.6
feign - HTTP client: Netflix Feign 8.1.1. JSON processing: Jackson 2.6.3
okhttp-gson (default) - HTTP client: OkHttp 2.4.0. JSON processing: Gson 2.3.1
retrofit - HTTP client: OkHttp 2.4.0. JSON processing: Gson 2.3.1 (Retrofit 1.9.0)
retrofit2 - HTTP client: OkHttp 2.5.0. JSON processing: Gson 2.4 (Retrofit 2.0.0-beta2)
google-api-client - HTTP client: google-api-client 1.23.0. JSON processing: Jackson 2.8.9
Your config file for Java can look like
{
"groupId":"com.my.company",
"artifactId":"MyClient",
"artifactVersion":"1.2.0",
"library":"feign"
}
For all the unspecified options default values will be used.
Another way to override default options is to extend the config class for the specific language. To change, for example, the prefix for the Objective-C generated files, simply subclass the ObjcClientCodegen.java:
package com.mycompany.swagger.codegen;
import io.swagger.codegen.languages.*;
public class MyObjcCodegen extends ObjcClientCodegen {
static {
PREFIX = "HELO";
}
}
and specify the classname
when running the generator:
-l com.mycompany.swagger.codegen.MyObjcCodegen
Your subclass will now be loaded and overrides the PREFIX
value in the superclass.
Sometimes you don't want a model generated. In this case, you can simply specify an import mapping to tell the codegen what not to create. When doing this, every location that references a specific model will refer back to your classes. Note, this may not apply to all languages...
To specify an import mapping, use the --import-mappings
argument and specify the model-to-import logic as such:
--import-mappings Pet=my.models.MyPet
Or for multiple mappings:
--import-mappings Pet=my.models.MyPet,Order=my.models.MyOrder
or
--import-mappings Pet=my.models.MyPet --import-mappings Order=my.models.MyOrder
You have options. The easiest is to use our online validator which not only will let you validate your spec, but with the debug flag, you can see what's wrong with your spec. For example:
https://online.swagger.io/validator/debug?url=https://petstore.swagger.io/v2/swagger.json
To do so, just use the -l dynamic-html
flag when reading a spec file. This creates HTML documentation that is available as a single-page application with AJAX. To view the documentation:
cd samples/dynamic-html/
npm install
node .
Which launches a node.js server so the AJAX calls have a place to go.
Please refer to https://github.com/swagger-api/swagger-codegen/wiki/Server-stub-generator-HOWTO for more information.
This will create the Swagger Codegen library from source.
mvn package
Note! The templates are included in the library generated. If you want to modify the templates, you'll need to either repackage the library OR specify a path to your scripts
You can use the swagger-codegen-maven-plugin for integrating with your workflow, and generating any codegen target.
Gradle Swagger Generator Plugin is available for generating source code and API document.
To push the auto-generated SDK to GitHub, we provide git_push.sh
to streamline the process. For example:
-
Create a new repository in GitHub (Ref: https://help.github.com/articles/creating-a-new-repository/)
-
Generate the SDK
java -jar modules/swagger-codegen-cli/target/swagger-codegen-cli.jar generate \
-i modules/swagger-codegen/src/test/resources/2_0/petstore.json -l perl \
--git-user-id "swaggerapi" \
--git-repo-id "petstore-perl" \
--release-note "Github integration demo" \
-o /var/tmp/perl/petstore
- Push the SDK to GitHub
cd /var/tmp/perl/petstore
/bin/sh ./git_push.sh
swagger-generator
module exposes codegen as a web service, with it's own swagger-js
based web UI, and available docker image swaggerapi/swagger-generator-v3
Such web service is deployed at https://generator3.swagger.io/ui, or it can be easily deployed as docker container.
The OpenAPI specification of generator service APIs are available either via UI exposed by web service (e.g. https://generator3.swagger.io/ui), as exposed YAML (https://generator3.swagger.io/openapi.json) or in source code repo (https://github.com/swagger-api/swagger-codegen/blob/3.0.0/modules/swagger-generator/src/main/resources/openapi.yaml)
Please note that both V2 (for v2 specs) and V3 generators (for v3 and v2 specs converted during generation) are supported, by providing property codegenVersion
(e.g "codegenVersion" : "v3"
)
For example, to generate a java API client, simply send the following HTTP request using curl:
curl -X POST \
https://generator3.swagger.io/api/generate \
-H 'content-type: application/json' \
-d '{
"specURL" : "https://raw.githubusercontent.com/OAI/OpenAPI-Specification/master/examples/v3.0/petstore.yaml",
"lang" : "java",
"type" : "CLIENT",
"codegenVersion" : "V3"
}'
The response will contain a zipped file containing the generated code.
To customize the SDK, you can specify language specific options with the following HTTP body:
{
"specURL" : "https://raw.githubusercontent.com/OAI/OpenAPI-Specification/master/examples/v3.0/petstore.yaml",
"lang" : "java",
"options" : {
"additionalProperties" : {
"useRuntimeException": true,
"useRxJava" : true
}
},
"type" : "CLIENT",
"codegenVersion" : "V3"
}
in which the options
additionalProperties
for a language can be obtained by submitting a GET
request to https://generator3.swagger.io/api/options?language={language}&version={codegenVersion}
:
For example, curl https://generator3.swagger.io/api/options?language=java&version=V3
returns (truncated output):
{
"sortParamsByRequiredFlag": {
"opt": "sortParamsByRequiredFlag",
"description": "Sort method arguments to place required parameters before optional parameters.",
"type": "boolean",
"default": "true"
},
"ensureUniqueParams": {
"opt": "ensureUniqueParams",
"description": "Whether to ensure parameter names are unique in an operation (rename parameters that are not).",
"type": "boolean",
"default": "true"
},
"allowUnicodeIdentifiers": {
"opt": "allowUnicodeIdentifiers",
"description": "boolean, toggles whether unicode identifiers are allowed in names or not, default is false",
"type": "boolean",
"default": "false"
},
"modelPackage": {
"opt": "modelPackage",
"description": "package for generated models",
"type": "string"
},
...
Instead of using specURL
with an URL to the OpenAPI/Swagger spec, one can include the spec in the JSON payload with spec
, e.g.
{
"options": {},
"spec": {
"swagger": "2.0",
"info": {
"version": "1.0.0",
"title": "Test API"
},
...
}
}
Please refer to this page.
Also for swagger-codegen version 3
templates and classes for code generation are being migrated to swagger-codegen-generators
repo. In order to know this migration process you can refer this page.
Please disclose any security-related issues or vulnerabilities by emailing [email protected], instead of using the public issue tracker.
The Swagger Codegen project is intended as a benefit for users of the Swagger / Open API Specification. The project itself has the License as specified. In addition, please understand the following points:
- The templates included with this project are subject to the License.
- Generated code is intentionally not subject to the parent project license
When code is generated from this project, it shall be considered AS IS and owned by the user of the software. There are no warranties--expressed or implied--for generated code. You can do what you wish with it, and once generated, the code is your responsibility and subject to the licensing terms that you deem appropriate.
Copyright 2019 SmartBear Software
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at [apache.org/licenses/LICENSE-2.0](https://www.apache.org/licenses/LICENSE-2.0)
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.