title: Eclipse warning: XXXXXXXXXXX.jar will not be exported or published. Runtime ClassNotFoundExceptions may result
body: <p>I keep getting the following error after I put the required files in my build path on Eclipse. I am working on a Spring MVC Hello World Application and using Eclipse Helios for Java EE developers:</p>
  
  <pre><code>Jan 16, 2012 1:25:42 PM org.apache.catalina.core.StandardContext loadOnStartup
  SEVERE: Servlet /SpringMVCTutorial threw load() exception
  java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
      at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:415)
      at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:397)
      at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118)
      at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1062)
      at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1010)
      at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4957)
      at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5284)
      at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5279)
      at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
      at java.util.concurrent.FutureTask.run(Unknown Source)
      at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
      at java.lang.Thread.run(Unknown Source)
  </code></pre>
  
  <p>I have tried right-clicking the server and clicking "clean".  I right click the application, click "Build Path" the "Configure Build Path" and put the right JAR files in the library; however, it still doesn't acknowledge them as dependencies.  What am I missing?</p>
  
  <p>I have tried the advice presented <a href="https://stackoverflow.com/questions/4255826/eclipse-helios-tomcat-project-jar-will-not-be-exported-or-published-runtime">here</a>:</p>
  
  <ol>
  <li>Right-click on your Web project</li>
  <li>Click 'Properties'</li>
  <li>Select 'Java EE Module Dependencies'</li>
  <li>Click the 'Web Libraries' tab</li>
  <li>Add external JARs (if the JAR is outside of your project). An entry will be added under Jar/Module, make sure you click on the checkbox (checked).</li>
  </ol>
  
  <p>The problem is that when I select "Click Properties", I do not have the option of clicking Java EE Module dependencies, as it doesn't appear. I downloaded any extra Java EE tools and still can't find it.</p>