[BUG] Spring Boot fails to parse LocalDate query parameter

Created by: macjohnny

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
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Description

When defining a query parameter of type: string and format: date

  /bla:
    get:
      parameters:
        - $ref: '#/parameters/analysisDate'
      produces:
        - application/json
      responses:
          200:
            description: 'Successful operation'

parameters:
  analysisDate:
    name: analysisDate
    in: query
    required: true
    type: string
    format: date

the server fails to parse a url like /bla?analysisDate=2017-11-30

The generated code looks like

 blaGet(@NotNull @ApiParam(value = "Analysis Date", required = true) @Valid @RequestParam(value = "analysisDate", required = true) LocalDate analysisDate) 

openapi-generator version

3.3.4

Related issues/PRs

https://blog.codecentric.de/en/2017/08/parsing-of-localdate-query-parameters-in-spring-boot/ https://github.com/spring-projects/spring-boot/pull/9930

Suggest a fix

adding @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) resolves the issue:

blaGet(@NotNull @ApiParam(value = "Analysis Date", required = true) @Valid @RequestParam(value = "analysisDate", required = true) @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) LocalDate analysisDate)