title: Grails JAR file in lib directory not found
body: <p>I have a Java class which is located in <code>src/java</code> that references classes from an external JAR. I copied the JAR file to the <code>lib</code> directory. When I go to run the app using <code>grails run-app</code> I get an error that it can't find the imported class.</p>
  
  <p>What is the correct location to put JARs for a Grails project? Is there some special command to get Grails to recognize the newly added JAR files?</p>
  
  <p>I am running Grails 2.0.0 with Java 1.6.0_29 on OS X.</p>
  
  <p><strong>Follow-up:</strong> The JARs are question are from <a href="http://hc.apache.org/downloads.cgi" rel="noreferrer">Apache HttpComponents</a>. More specifically:</p>
  
  <pre><code>commons-codec-1.4.jar
  commons-logging-1.1.1.jar
  httpclient-4.1.2.jar
  httpclient-cache-4.1.2.jar
  httpcore-4.1.2.jar
  httpmime-4.1.2.jar
  </code></pre>
  
  <p>The class files in them are compiled to Java 1.3, which shouldn't be a problem.</p>
  
  <pre><code>~/temp/org/apache/http $ file HttpResponse.class 
  HttpResponse.class: compiled Java class data, version 47.0 (Java 1.3)
  </code></pre>