title: How do I set log4j level on the command line?
body: <p>I want to add some log.debug statements to a class I'm working on, and I'd like to see that in output when running the test. I'd like to override the log4j properties on the command line, with something like this:</p>
  
  <pre><code>-Dlog4j.logger.com.mypackage.Thingie=DEBUG
  </code></pre>
  
  <p>I do this kind of thing frequently. I am specifically only interested in a way to pass this on the command line. I know how to do it with a config file, and that doesn't suit my workflow.</p>