NoClassDefFound error in web application deployed on Tomcat

Question

I am new to Java and trying to develop a Java web application with a feature to browse the server's file system. The functionality works fine when I run the application in Eclipse but if I generate a WAR file (via "Export as WAR" in Eclipse) and deploy on Tomcat 7, it throws a NoClassDefFound error.

I have placed the required jar in the WEB-INB/lib folder and also noticed the jar is available after deployment.

Answer 1

first check your BuildPath. Your jars are added to build path are not. check with this link

Answer 2

Without the Exception trace can't provide more details, but try the following:

• Review the java.lang.NoClassDefFoundError error and identify the missing Java class.
• Verify and locate the missing Java class from your compile / build environment. -Determine if the missing Java class is from your application code or third part API.
• Go to Properties on your Project (right click) > Java Build Path > Order and Export . Check all needed librarys are included.

Hope this helps.