title: java.lang.NoClassDefFoundError: org/apache/poi/hssf/usermodel/HSSFWorkbook
body: <pre><code>java.lang.NoClassDefFoundError:org/apache/poi/hssf/usermodel/HSSFWorkbook
  </code></pre>
  
  <p>This is java web project. The java project is ok, but in web, I got this exception.</p>
  
  <pre><code>Caused by: java.lang.ClassNotFoundException: org.apache.poi.hssf.usermodel.HSSFWorkbook
  at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1680)
  at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1526)
  </code></pre>
  
  <p>maven dependency :</p>
  
  <pre><code>&lt;!-- apahce poi --&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;org.apache.poi&lt;/groupId&gt;
          &lt;artifactId&gt;poi&lt;/artifactId&gt;
          &lt;version&gt;3.7&lt;/version&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;org.apache.poi&lt;/groupId&gt;
          &lt;artifactId&gt;poi-scratchpad&lt;/artifactId&gt;
          &lt;version&gt;3.7&lt;/version&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;org.apache.poi&lt;/groupId&gt;
          &lt;artifactId&gt;poi-ooxml&lt;/artifactId&gt;
          &lt;version&gt;3.7&lt;/version&gt;
      &lt;/dependency&gt;
      &lt;dependency&gt;
          &lt;groupId&gt;org.apache.poi&lt;/groupId&gt;
          &lt;artifactId&gt;poi-ooxml-schemas&lt;/artifactId&gt;
          &lt;version&gt;3.7&lt;/version&gt;
      &lt;/dependency&gt;
  </code></pre>