find and replace with regex

Question

i have following coldfusion tags that are not self closed. I need to find and replace them with / at the end if not closed. i have come up with this exp <cfset([a-z0-9 ]+) *[^/]*?> that find them all, but how to add / on them by find & replace.

 <cfset var1="#db_var1#">

Result

 <cfset var1="#db_var1#" />

Answer 1

Regex:

(<cfset\b[^>]*)(?<!\/)>

Replace with:

\1/>

DEMO