It is possible to render Markdown text on your wikipages through Markdown Behavior, a javascript extension which allows to render pages written in markdown, while still using standard JSPWiki syntax.
As of JSPWiki 2.11, there is built in support for using Markdown instead of normal JSPWiki syntax.
The following line should be added to your jspwiki-custom.properties file:
jspwiki.syntax=markdown
which is equivalent to adding the following lines to your jspwiki-custom.properties file:
jspwiki.renderingManager.markupParser=org.apache.wiki.parser.markdown.MarkdownParser jspwiki.renderingManager.renderer=org.apache.wiki.render.markdown.MarkdownRenderer jspwiki.renderingManager.renderer.wysiwyg=org.apache.wiki.render.markdown.MarkdownRenderer jspwiki.syntax.decorator=org.apache.wiki.htmltowiki.syntax.markdown.MarkdownSyntaxDecorator jspwiki.syntax.plain=plain/wiki-snips-markdown.js