How to display a hyperlink in hudson/jenkins build output console

If you enter, for example:

echo 'http://example.com'

in a Build step Execute shell → Command the address will be hyperlinked in the Console Output, though not with target="_blank". But middle-clicking on it opens it in a new tab or window – depending on your browser preferences.

When using a (system) groovy script or Jenkins job pipeline (without sandbox) you may want to try e.g.:

import hudson.console.ModelHyperlinkNote
println hudson.console.ModelHyperlinkNote.encodeTo('http://example.com', 'example')

Please find the full API of hudson.console.ModelHyperlinkNote here: http://javadoc.jenkins-ci.org/hudson/console/ModelHyperlinkNote.html