[java][okhttp-gson] support multiple file upload (!11361) · Merge requests · OpenAPI Tools / openapi-generator

Merged Administrator requested to merge github/fork/intersoftAG/master into master Jan 20, 2022

Created by: lschwahn

The method buildRequestBodyMultipart in ApiClient.java now recognizes if an input parameter is an instance of List. So it is possible for clients so send multiple files in one request.

Tested by using the generated code in one of our webservices.

Since the existing Pull-Request 8197 seems to be stuck, we made this one to apply the workaround (fixing the generated code) we are using for more than two years now.

PR checklist

Read the contribution guidelines.
Pull Request title clearly describes the work in the pull request and Pull Request description provides details about how to validate the work. Missing information here may result in delayed response from the community.
Run the following to build the project and update samples:
```
./mvnw clean package 
./bin/generate-samples.sh
./bin/utils/export_docs_generators.sh
```
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