title: How to package the project to war in play2?
body: <p>In play1, we can package the project to a war, then put it in a tomcat:</p>
  
  <pre><code>play war
  </code></pre>
  
  <p>But how to do the same in play2? <code>play war</code> doesn't work, it reports <code>war</code> is not a valid task.</p>