title: Having trouble implementing Apache POI; I have the right dependencies but imports don't seem to work
body: <p>I have been trying to implement Apache POI to export Excel files from a Spring 3.0 web app. I tried using many different versions of its dependencies (from 3.2 to 3.8_beta5 version) but it turns out my controller can't recognize the imports in the &quot;org.apache.poi.ss.usermodel&quot;.</p>
  <p>Is there something I am missing? I am very new to this exporting stuff so I am willing to take any suggestions. I would even consider using a completely different API.</p>
  <p>Here is the dependency I currently have</p>
  <pre><code>&lt;dependency&gt;
      &lt;groupId&gt;org.apache.poi&lt;/groupId&gt;
      &lt;artifactId&gt;poi&lt;/artifactId&gt;
      &lt;version&gt;3.6&lt;/version&gt;
      &lt;type&gt;jar&lt;/type&gt;
      &lt;scope&gt;compile&lt;/scope&gt;
  &lt;/dependency&gt;
  </code></pre>
  <p>the missing classes are</p>
  <pre><code> import org.apache.poi.ss.usermodel.Cell;
   import org.apache.poi.ss.usermodel.Row;
   import org.apache.poi.ss.usermodel.Sheet;
   import org.apache.poi.ss.usermodel.Workbook;
   import org.apache.poi.ss.util.CellReference;
   import org.apache.poi.xssf.streaming.SXSSFWorkbook;
   
  </code></pre>