---
title: Documentation for the spring Generator
---

## METADATA

| Property | Value | Notes |
| -------- | ----- | ----- |
| generator name | spring | pass this to the generate command after -g |
| generator stability | STABLE | |
| generator type | SERVER | |
| generator language | Java | |
| generator default templating engine | mustache | |
| helpTxt | Generates a Java SpringBoot Server application using the SpringDoc integration. | |

## CONFIG OPTIONS
These options may be applied as additional-properties (cli) or configOptions (plugins). Refer to [configuration docs](https://openapi-generator.tech/docs/configuration) for more details.

| Option | Description | Values | Default |
| ------ | ----------- | ------ | ------- |
|additionalEnumTypeAnnotations|Additional annotations for enum type(class level annotations)| |null|
|additionalModelTypeAnnotations|Additional annotations for model type(class level annotations). List separated by semicolon(;) or new line (Linux or Windows)| |null|
|additionalOneOfTypeAnnotations|Additional annotations for oneOf interfaces(class level annotations). List separated by semicolon(;) or new line (Linux or Windows)| |null|
|allowUnicodeIdentifiers|boolean, toggles whether unicode identifiers are allowed in names or not, default is false| |false|
|annotationLibrary|Select the complementary documentation annotation library.|<dl><dt>**none**</dt><dd>Do not annotate Model and Api with complementary annotations.</dd><dt>**swagger1**</dt><dd>Annotate Model and Api using the Swagger Annotations 1.x library.</dd><dt>**swagger2**</dt><dd>Annotate Model and Api using the Swagger Annotations 2.x library.</dd></dl>|swagger2|
|apiFirst|Generate the API from the OAI spec at server compile time (API first approach)| |false|
|apiPackage|package for generated api classes| |org.openapitools.api|
|artifactDescription|artifact description in generated pom.xml| |OpenAPI Java|
|artifactId|artifactId in generated pom.xml. This also becomes part of the generated library's filename| |openapi-spring|
|artifactUrl|artifact URL in generated pom.xml| |https://github.com/openapitools/openapi-generator|
|artifactVersion|artifact version in generated pom.xml. This also becomes part of the generated library's filename| |1.0.0|
|async|use async Callable controllers| |false|
|basePackage|base package (invokerPackage) for generated code| |org.openapitools|
|bigDecimalAsString|Treat BigDecimal values as Strings to avoid precision loss.| |false|
|booleanGetterPrefix|Set booleanGetterPrefix| |get|
|camelCaseDollarSign|Fix camelCase when starting with $ sign. when true : $Value when false : $value| |false|
|configPackage|configuration package for generated code| |org.openapitools.configuration|
|containerDefaultToNull|Set containers (array, set, map) default to null| |false|
|dateLibrary|Option. Date library to use|<dl><dt>**joda**</dt><dd>Joda (for legacy app only)</dd><dt>**legacy**</dt><dd>Legacy java.util.Date</dd><dt>**java8-localdatetime**</dt><dd>Java 8 using LocalDateTime (for legacy app only)</dd><dt>**java8**</dt><dd>Java 8 native JSR310 (preferred for jdk 1.8+)</dd></dl>|java8|
|delegatePattern|Whether to generate the server files using the delegate pattern| |false|
|developerEmail|developer email in generated pom.xml| |team@openapitools.org|
|developerName|developer name in generated pom.xml| |OpenAPI-Generator Contributors|
|developerOrganization|developer organization in generated pom.xml| |OpenAPITools.org|
|developerOrganizationUrl|developer organization URL in generated pom.xml| |http://openapitools.org|
|disableHtmlEscaping|Disable HTML escaping of JSON strings when using gson (needed to avoid problems with byte[] fields)| |false|
|disallowAdditionalPropertiesIfNotPresent|If false, the 'additionalProperties' implementation (set to true by default) is compliant with the OAS and JSON schema specifications. If true (default), keep the old (incorrect) behaviour that 'additionalProperties' is set to false by default.|<dl><dt>**false**</dt><dd>The 'additionalProperties' implementation is compliant with the OAS and JSON schema specifications.</dd><dt>**true**</dt><dd>Keep the old (incorrect) behaviour that 'additionalProperties' is set to false by default.</dd></dl>|true|
|discriminatorCaseSensitive|Whether the discriminator value lookup should be case-sensitive or not. This option only works for Java API client| |true|
|documentationProvider|Select the OpenAPI documentation provider.|<dl><dt>**none**</dt><dd>Do not publish an OpenAPI specification.</dd><dt>**source**</dt><dd>Publish the original input OpenAPI specification.</dd><dt>**springfox**</dt><dd>Generate an OpenAPI 2 (fka Swagger RESTful API Documentation Specification) specification using SpringFox 2.x. Deprecated (for removal); use springdoc instead.</dd><dt>**springdoc**</dt><dd>Generate an OpenAPI 3 specification using SpringDoc.</dd></dl>|springdoc|
|ensureUniqueParams|Whether to ensure parameter names are unique in an operation (rename parameters that are not).| |true|
|enumUnknownDefaultCase|If the server adds new enum cases, that are unknown by an old spec/client, the client will fail to parse the network response.With this option enabled, each enum will have a new case, 'unknown_default_open_api', so that when the server sends an enum case that is not known by the client/spec, they can safely fallback to this case.|<dl><dt>**false**</dt><dd>No changes to the enum's are made, this is the default option.</dd><dt>**true**</dt><dd>With this option enabled, each enum will have a new case, 'unknown_default_open_api', so that when the enum case sent by the server is not known by the client/spec, can safely be decoded to this case.</dd></dl>|false|
|generatedConstructorWithRequiredArgs|Whether to generate constructors with required args for models| |true|
|groupId|groupId in generated pom.xml| |org.openapitools|
|hateoas|Use Spring HATEOAS library to allow adding HATEOAS links| |false|
|hideGenerationTimestamp|Hides the generation timestamp when files are generated.| |false|
|ignoreAnyOfInEnum|Ignore anyOf keyword in enum| |false|
|implicitHeaders|Skip header parameters in the generated API methods using @ApiImplicitParams annotation.| |false|
|implicitHeadersRegex|Skip header parameters that matches given regex in the generated API methods using @ApiImplicitParams annotation. Note: this parameter is ignored when implicitHeaders=true| |null|
|interfaceOnly|Whether to generate only API interface stubs without the server files.| |false|
|invokerPackage|root package for generated code| |org.openapitools.api|
|legacyDiscriminatorBehavior|Set to false for generators with better support for discriminators. (Python, Java, Go, PowerShell, C# have this enabled by default).|<dl><dt>**true**</dt><dd>The mapping in the discriminator includes descendent schemas that allOf inherit from self and the discriminator mapping schemas in the OAS document.</dd><dt>**false**</dt><dd>The mapping in the discriminator includes any descendent schemas that allOf inherit from self, any oneOf schemas, any anyOf schemas, any x-discriminator-values, and the discriminator mapping schemas in the OAS document AND Codegen validates that oneOf and anyOf schemas contain the required discriminator and throws an error if the discriminator is missing.</dd></dl>|true|
|library|library template (sub-template)|<dl><dt>**spring-boot**</dt><dd>Spring-boot Server application.</dd><dt>**spring-cloud**</dt><dd>Spring-Cloud-Feign client with Spring-Boot auto-configured settings.</dd><dt>**spring-http-interface**</dt><dd>Spring 6 HTTP interfaces (testing)</dd></dl>|spring-boot|
|licenseName|The name of the license| |Unlicense|
|licenseUrl|The URL of the license| |http://unlicense.org|
|modelPackage|package for generated models| |org.openapitools.model|
|openApiNullable|Enable OpenAPI Jackson Nullable library| |true|
|parentArtifactId|parent artifactId in generated pom N.B. parentGroupId, parentArtifactId and parentVersion must all be specified for any of them to take effect| |null|
|parentGroupId|parent groupId in generated pom N.B. parentGroupId, parentArtifactId and parentVersion must all be specified for any of them to take effect| |null|
|parentVersion|parent version in generated pom N.B. parentGroupId, parentArtifactId and parentVersion must all be specified for any of them to take effect| |null|
|performBeanValidation|Use Bean Validation Impl. to perform BeanValidation| |false|
|prependFormOrBodyParameters|Add form or body parameters to the beginning of the parameter list.| |false|
|reactive|wrap responses in Mono/Flux Reactor types (spring-boot only)| |false|
|requestMappingMode|Where to generate the class level @RequestMapping annotation.|<dl><dt>**api_interface**</dt><dd>Generate the @RequestMapping annotation on the generated Api Interface.</dd><dt>**controller**</dt><dd>Generate the @RequestMapping annotation on the generated Api Controller Implementation.</dd><dt>**none**</dt><dd>Do not add a class level @RequestMapping annotation.</dd></dl>|controller|
|resourceFolder|resource folder for generated resources| |src/main/resources|
|responseWrapper|wrap the responses in given type (Future, Callable, CompletableFuture,ListenableFuture, DeferredResult, RxObservable, RxSingle or fully qualified type)| |null|
|returnSuccessCode|Generated server returns 2xx code| |false|
|scmConnection|SCM connection in generated pom.xml| |scm:git:git@github.com:openapitools/openapi-generator.git|
|scmDeveloperConnection|SCM developer connection in generated pom.xml| |scm:git:git@github.com:openapitools/openapi-generator.git|
|scmUrl|SCM URL in generated pom.xml| |https://github.com/openapitools/openapi-generator|
|serializableModel|boolean - toggle &quot;implements Serializable&quot; for generated models| |false|
|singleContentTypes|Whether to select only one produces/consumes content-type by operation.| |false|
|skipDefaultInterface|Whether to skip generation of default implementations for java8 interfaces| |false|
|snapshotVersion|Uses a SNAPSHOT version.|<dl><dt>**true**</dt><dd>Use a SnapShot Version</dd><dt>**false**</dt><dd>Use a Release Version</dd></dl>|null|
|sortModelPropertiesByRequiredFlag|Sort model properties to place required parameters before optional parameters.| |true|
|sortParamsByRequiredFlag|Sort method arguments to place required parameters before optional parameters.| |true|
|sourceFolder|source folder for generated code| |src/main/java|
|testOutput|Set output folder for models and APIs tests| |${project.build.directory}/generated-test-sources/openapi|
|title|server title name or client service name| |OpenAPI Spring|
|unhandledException|Declare operation methods to throw a generic exception and allow unhandled exceptions (useful for Spring `@ControllerAdvice` directives).| |false|
|useBeanValidation|Use BeanValidation API annotations| |true|
|useEnumCaseInsensitive|Use `equalsIgnoreCase` when String for enum comparison| |false|
|useFeignClientUrl|Whether to generate Feign client with url parameter.| |true|
|useJakartaEe|whether to use Jakarta EE namespace instead of javax| |false|
|useOneOfInterfaces|whether to use a java interface to describe a set of oneOf options, where each option is a class that implements the interface| |false|
|useOptional|Use Optional container for optional parameters| |false|
|useResponseEntity|Use the `ResponseEntity` type to wrap return values of generated API methods. If disabled, method are annotated using a `@ResponseStatus` annotation, which has the status of the first response declared in the Api definition| |true|
|useSpringBoot3|Generate code and provide dependencies for use with Spring Boot 3.x. (Use jakarta instead of javax in imports). Enabling this option will also enable `useJakartaEe`.| |false|
|useSpringController|Annotate the generated API as a Spring Controller| |false|
|useSwaggerUI|Open the OpenApi specification in swagger-ui. Will also import and configure needed dependencies| |true|
|useTags|use tags for creating interface and controller classnames| |false|
|virtualService|Generates the virtual service. For more details refer - https://github.com/virtualansoftware/virtualan/wiki| |false|
|withXml|whether to include support for application/xml content type and include XML annotations in the model (works with libraries that provide support for JSON and XML)| |false|

## SUPPORTED VENDOR EXTENSIONS

| Extension name | Description | Applicable for | Default value |
| -------------- | ----------- | -------------- | ------------- |
|x-discriminator-value|Used with model inheritance to specify value for discriminator that identifies current model|MODEL|
|x-implements|Ability to specify interfaces that model must implements|MODEL|empty array
|x-setter-extra-annotation|Custom annotation that can be specified over java setter for specific field|FIELD|When field is array & uniqueItems, then this extension is used to add `@JsonDeserialize(as = LinkedHashSet.class)` over setter, otherwise no value
|x-tags|Specify multiple swagger tags for operation|OPERATION|null
|x-accepts|Specify custom value for 'Accept' header for operation|OPERATION|null
|x-content-type|Specify custom value for 'Content-Type' header for operation|OPERATION|null
|x-class-extra-annotation|List of custom annotations to be added to model|MODEL|null
|x-field-extra-annotation|List of custom annotations to be added to property|FIELD|null
|x-spring-paginated|Add org.springframework.data.domain.Pageable to controller method. Can be used to handle page & size query parameters|OPERATION|false
|x-version-param|Marker property that tells that this parameter would be used for endpoint versioning. Applicable for headers & query params. true/false|OPERATION_PARAMETER|null
|x-pattern-message|Add this property whenever you need to customize the invalidation error message for the regex pattern of a variable|FIELD|null


## IMPORT MAPPING

| Type/Alias | Imports |
| ---------- | ------- |
|Array|java.util.List|
|ArrayList|java.util.ArrayList|
|BigDecimal|java.math.BigDecimal|
|Date|java.util.Date|
|DateTime|org.joda.time.*|
|File|java.io.File|
|HashMap|java.util.HashMap|
|LinkedHashSet|java.util.LinkedHashSet|
|List|java.util.*|
|LocalDate|org.joda.time.*|
|LocalDateTime|org.joda.time.*|
|LocalTime|org.joda.time.*|
|Map|java.util.Map|
|Set|java.util.*|
|Timestamp|java.sql.Timestamp|
|URI|java.net.URI|
|UUID|java.util.UUID|


## INSTANTIATION TYPES

| Type/Alias | Instantiated By |
| ---------- | --------------- |
|array|ArrayList|
|map|HashMap|
|set|LinkedHashSet|


## LANGUAGE PRIMITIVES

<ul class="column-ul">
<li>Boolean</li>
<li>Double</li>
<li>Float</li>
<li>Integer</li>
<li>Long</li>
<li>Object</li>
<li>String</li>
<li>boolean</li>
<li>byte[]</li>
</ul>

## RESERVED WORDS

<ul class="column-ul">
<li>abstract</li>
<li>apiclient</li>
<li>apiexception</li>
<li>apiresponse</li>
<li>assert</li>
<li>boolean</li>
<li>break</li>
<li>byte</li>
<li>case</li>
<li>catch</li>
<li>char</li>
<li>class</li>
<li>configuration</li>
<li>const</li>
<li>continue</li>
<li>default</li>
<li>do</li>
<li>double</li>
<li>else</li>
<li>enum</li>
<li>extends</li>
<li>file</li>
<li>final</li>
<li>finally</li>
<li>float</li>
<li>for</li>
<li>goto</li>
<li>if</li>
<li>implements</li>
<li>import</li>
<li>instanceof</li>
<li>int</li>
<li>interface</li>
<li>list</li>
<li>localreturntype</li>
<li>localvaraccept</li>
<li>localvaraccepts</li>
<li>localvarauthnames</li>
<li>localvarcollectionqueryparams</li>
<li>localvarcontenttype</li>
<li>localvarcontenttypes</li>
<li>localvarcookieparams</li>
<li>localvarformparams</li>
<li>localvarheaderparams</li>
<li>localvarpath</li>
<li>localvarpostbody</li>
<li>localvarqueryparams</li>
<li>long</li>
<li>native</li>
<li>new</li>
<li>null</li>
<li>object</li>
<li>package</li>
<li>private</li>
<li>protected</li>
<li>public</li>
<li>return</li>
<li>short</li>
<li>static</li>
<li>strictfp</li>
<li>stringutil</li>
<li>super</li>
<li>switch</li>
<li>synchronized</li>
<li>this</li>
<li>throw</li>
<li>throws</li>
<li>transient</li>
<li>try</li>
<li>void</li>
<li>volatile</li>
<li>while</li>
</ul>

## FEATURE SET


### Client Modification Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|BasePath|✓|ToolingExtension
|Authorizations|✗|ToolingExtension
|UserAgent|✗|ToolingExtension
|MockServer|✗|ToolingExtension

### Data Type Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Custom|✗|OAS2,OAS3
|Int32|✓|OAS2,OAS3
|Int64|✓|OAS2,OAS3
|Float|✓|OAS2,OAS3
|Double|✓|OAS2,OAS3
|Decimal|✓|ToolingExtension
|String|✓|OAS2,OAS3
|Byte|✓|OAS2,OAS3
|Binary|✓|OAS2,OAS3
|Boolean|✓|OAS2,OAS3
|Date|✓|OAS2,OAS3
|DateTime|✓|OAS2,OAS3
|Password|✓|OAS2,OAS3
|File|✓|OAS2
|Uuid|✗|
|Array|✓|OAS2,OAS3
|Null|✗|OAS3
|AnyType|✗|OAS2,OAS3
|Object|✓|OAS2,OAS3
|Maps|✓|ToolingExtension
|CollectionFormat|✓|OAS2
|CollectionFormatMulti|✓|OAS2
|Enum|✓|OAS2,OAS3
|ArrayOfEnum|✓|ToolingExtension
|ArrayOfModel|✓|ToolingExtension
|ArrayOfCollectionOfPrimitives|✓|ToolingExtension
|ArrayOfCollectionOfModel|✓|ToolingExtension
|ArrayOfCollectionOfEnum|✓|ToolingExtension
|MapOfEnum|✓|ToolingExtension
|MapOfModel|✓|ToolingExtension
|MapOfCollectionOfPrimitives|✓|ToolingExtension
|MapOfCollectionOfModel|✓|ToolingExtension
|MapOfCollectionOfEnum|✓|ToolingExtension

### Documentation Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Readme|✓|ToolingExtension
|Model|✓|ToolingExtension
|Api|✓|ToolingExtension

### Global Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Host|✓|OAS2,OAS3
|BasePath|✓|OAS2,OAS3
|Info|✓|OAS2,OAS3
|Schemes|✗|OAS2,OAS3
|PartialSchemes|✓|OAS2,OAS3
|Consumes|✓|OAS2
|Produces|✓|OAS2
|ExternalDocumentation|✓|OAS2,OAS3
|Examples|✓|OAS2,OAS3
|XMLStructureDefinitions|✓|OAS2,OAS3
|MultiServer|✗|OAS3
|ParameterizedServer|✗|OAS3
|ParameterStyling|✗|OAS3
|Callbacks|✗|OAS3
|LinkObjects|✗|OAS3

### Parameter Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Path|✓|OAS2,OAS3
|Query|✓|OAS2,OAS3
|Header|✓|OAS2,OAS3
|Body|✓|OAS2
|FormUnencoded|✓|OAS2
|FormMultipart|✓|OAS2
|Cookie|✗|OAS3

### Schema Support Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|Simple|✓|OAS2,OAS3
|Composite|✓|OAS2,OAS3
|Polymorphism|✓|OAS2,OAS3
|Union|✗|OAS3
|allOf|✗|OAS2,OAS3
|anyOf|✗|OAS3
|oneOf|✗|OAS3
|not|✗|OAS3

### Security Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|BasicAuth|✓|OAS2,OAS3
|ApiKey|✓|OAS2,OAS3
|OpenIDConnect|✗|OAS3
|BearerToken|✗|OAS3
|OAuth2_Implicit|✓|OAS2,OAS3
|OAuth2_Password|✓|OAS2,OAS3
|OAuth2_ClientCredentials|✓|OAS2,OAS3
|OAuth2_AuthorizationCode|✓|OAS2,OAS3
|SignatureAuth|✗|OAS3

### Wire Format Feature
| Name | Supported | Defined By |
| ---- | --------- | ---------- |
|JSON|✓|OAS2,OAS3
|XML|✓|OAS2,OAS3
|PROTOBUF|✗|ToolingExtension
|Custom|✓|OAS2,OAS3
