title: ClassNotFoundException of NIO using Tomcat 7 and Java 7
body: <p>I build a web project in Eclipse Kepler with Apache Tomcat 7.0.47.</p>
  
  <p>While running on server, it causes <code>java.lang.ClassNotFoundException: java.nio.file.Paths</code> as below.</p>
  
  <pre><code>java.lang.NoClassDefFoundError: java/nio/file/Paths
      at ...
  Caused by: java.lang.ClassNotFoundException: java.nio.file.Paths
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702)
      at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547)
      ... 12 more
  </code></pre>
  
  <p>It worked well before I invite this new feature of Java 7. Could anyone give me some suggest to figure out what's going on here please?</p>