[BUG][JAVA][SPRING] Openapi generator does not work properly with array example when use 3.1.1 specification format

[SashaVolushkova]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

I use openapi generator with spring boot. I have specification of api and i want use 3.1.1 Openapi version. I have a model with arrays and want to provide example.

when I set into spec 3.1.1 version i have a such code in generated files (incorrect):

  @Schema(name = "nodes", example = "[{name=Node1}, {name=Node2}, {name=Node3}]", description = "List of nodes in the EventGraph.", requiredMode = Schema.RequiredMode.NOT_REQUIRED)

when i set 3.0.1 version in spec file i have this (correct):

@Schema(name = "nodes", example = "[{\"name\":\"Node1\"},{\"name\":\"Node2\"},{\"name\":\"Node3\"}]", description = "List of nodes in the EventGraph.", requiredMode = Schema.RequiredMode.NOT_REQUIRED)

openapi-generator version

gradle plugin id "org.openapi.generator" version "7.12.0"
generator: spring

OpenAPI declaration file content or url

openapi: 3.1.1
info:
  title: EventGraph API
  version: 1.0.0
paths:
  /simplePost:
    post:
      summary: Simple post request
      description: description
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/SomeDTO'
      responses:
        '200':
          description: Expected response to a valid request
          content:
            application/json:
              schema:
                $ref: "#/components/schemas/SomeDTO"
components:
  schemas:
    SomeDTO:
      type: object
      properties:
        name:
          type: string
        nodes:
          description: List of nodes in the EventGraph.
          type: array
          items:
            $ref: '#/components/schemas/NodeDTO'
          example:
            - name: Node1
            - name: Node2
            - name: Node3
    NodeDTO:
      type: object
      properties:
        name:
          type: string
      required:
        - name

Generation Details

generator - spring

openApiGenerate {
    generatorName = "spring"
    inputSpec = "${project.projectDir}/src/main/resources/error-test.yml".replace("\\","/")
    outputDir = "${buildDir}/generated"
    apiPackage = "pro.axenix_innovation.axenapi.web.api"
    modelPackage = "pro.axenix_innovation.axenapi.web.model"
    configOptions = [
            useSpringBoot3: "true",
            interfaceOnly: "true",
            useTags: "true",
            generateBuilders: "true",
            generatedConstructorWithRequiredArgs: "true",
            generateConstructorWithAllArgs: "true"
    ]
}

Steps to reproduce

Use my specification(i thing any spec with array example). Use gradle plugin with specification in the issue

Related issues/PRs

Suggest a fix