[REQ] Support for @SpringQueryMap in spring-cloud

Could you please add support for @SpringQueryMap for @GetMapping if parameter is type of Object?

Support for:

generator: spring
library: spring-cloud

Example:

ResponseEntity<List<Client>> findClients(@NotNull @SpringQueryMap @ApiParam(value = "Client filter object", required = true) @Valid ClientFilter filter);

Propsed solution:

Change JavaSpring/queryParams.mustache to

{{#isQueryParam}}{{#useBeanValidation}}{{>beanValidationQueryParams}}{{/useBeanValidation}}@ApiParam(value = "{{{description}}}"{{#required}}, required = true{{/required}}{{#allowableValues}}, allowableValues = "{{#values}}{{{.}}}{{^-last}}, {{/-last}}{{#-last}}{{/-last}}{{/values}}"{{/allowableValues}}{{^isContainer}}{{#defaultValue}}, defaultValue = "{{{defaultValue}}}"{{/defaultValue}}{{/isContainer}}) {{#useBeanValidation}}@Valid{{/useBeanValidation}} {{#isExplode}}{{#isDeepObject}}@org.springframework.cloud.openfeign.SpringQueryMap{{/isDeepObject}}{{/isExplode}}{{^isModel}} @RequestParam(value = {{#isMap}}""{{/isMap}}{{^isMap}}"{{baseName}}"{{/isMap}}{{#required}}, required = true{{/required}}{{^required}}, required = false{{/required}}{{^isContainer}}{{#defaultValue}}, defaultValue="{{{defaultValue}}}"{{/defaultValue}}{{/isContainer}}){{/isModel}}{{#isDate}} @org.springframework.format.annotation.DateTimeFormat(iso = org.springframework.format.annotation.DateTimeFormat.ISO.DATE){{/isDate}}{{#isDateTime}} @org.springframework.format.annotation.DateTimeFormat(iso = org.springframework.format.annotation.DateTimeFormat.ISO.DATE_TIME){{/isDateTime}} {{>optionalDataType}} {{paramName}}{{/isQueryParam}}

This code snippet adds support for serialize object as query parameters

{{#isExplode}}{{#isDeepObject}}@org.springframework.cloud.openfeign.SpringQueryMap{{/isDeepObject}}{{/isExplode}}

Thank you

Start with JavaSpring/queryParams.mustache for the spring generator and compare its handling of object parameters with the @GetMapping example in the issue. Update the template so the requested SpringQueryMap annotation is generated for exploded deep-object query parameters, then verify the generated declaration matches the proposed output.