How can I implement CSS Cache Busting with JSF outputStylesheet?

In JSF page templates I use this code to include a CSS resource:

<h:outputStylesheet library="css" name="m开发者_StackOverflow社区ystyles.css"  />

The usual way to implement CSS cache busting would be to add a version parameter, like v=123, however this is not supported in outputStyleSheet:

<h:outputStylesheet library="css" name="mystyles.css?v=123"  />

will cause a JSF1064 warning and the CSS will not be found.

That's not possible without overridding the StylesheetRenderer (assuming you're on Mojarra). It does indeed not take the query string into account. However, as a (temporary) workaround it's good to know that it is valid to include the CSS using CSS' own @import rule inside <h:outputStyleSheet>.

<h:outputStylesheet target="head">
    @import url('css/mystyles.css?v=123')
</h:outputStylesheet>

You might want to post an enhancement request to the Mojarra boys to take this into account in future releases.