title: How to disable loggers of a class or of whole package?
body: <p>I am using <a href="https://commons.apache.org/proper/commons-logging/" rel="noreferrer"><em>Apache Commons Logging ™</em></a>. For now I wanted to use <a href="https://commons.apache.org/proper/commons-logging/apidocs/org/apache/commons/logging/impl/SimpleLog.html" rel="noreferrer"><code>SimpleLog</code></a> implementation, but when I changed the level, loggers from the libraries came out. I want it to turn them off. </p>
  
  <p>Is there a easy way to change log level for whole package (can Log4j do that)?  </p>
  
  <p>I have tried to set</p>
  
  <blockquote>
    <p>org.apache.commons.logging.simplelog.log.foo=fatal</p>
  </blockquote>
  
  <p>in the property files to disable (setting to fatal is OK) <code>foo</code> logger, but it doesn't work (foo is a  name of logger that appears in output : <code>[INFO] foo - Message</code>).</p>