Preferred way to convert openapi 3 document (json or yaml) to markdown, adoc or any other static format

I try to find an easy way in java to convert an openapi 3 document (json or yaml) in a static format like markdown, html or adoc. Searching around I've found a view projects like Swagger2Markup, but they aren't ready for Openapi v3!

Does anyone have any advice or an hint for a library or maven plugin for me?

I've found the correct maven plugin to do this:

<plugin>
    <!-- converts the openapi docu to html -->
    <groupId>io.swagger.codegen.v3</groupId>
    <artifactId>swagger-codegen-maven-plugin</artifactId>
    <version>3.0.35</version>
    <executions>
        <execution>
            <id>export-opennapi-to-html-doc</id>
            <goals>
                <goal>generate</goal>
            </goals>
            <configuration>
               <inputSpec>${project.build.directory}/api.yml</inputSpec>
               <language>html2</language>
               <output>${project.basedir}/docs</output>
             </configuration>
         </execution>
    </executions>
</plugin>