java.lang.NoClassDefFoundError: org/springframework/core/io/Resource

Error:

  
SEVERE: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener
java.lang.NoClassDefFoundError: org/springframework/core/io/Resource
 at java.lang.Class.getDeclaredConstructors0(Native Method)
 at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
 at java.lang.Class.getConstructor0(Unknown Source)
 at java.lang.Class.newInstance0(Unknown Source)
 at java.lang.Class.newInstance(Unknown Source)
 at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:119)
 at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4638)
 at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5204)
 at org.apache.catalina.core.StandardContext$1.call(StandardContext.java:5199)
 at java.util.concurrent.FutureTask$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)
Caused by: java.lang.ClassNotFoundException: org.springframework.core.io.Resource
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1676)
 at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1521)
 ... 14 more

Solution :
Make sure, following jar file included in your class path and lib folder.

spring-core-3.0.5.RELEASE.jar

if you are using maven, make sure you have included dependency for spring-core-3xxxxx.jar file

 
 
  org.springframework
  spring-core
  ${org.springframework.version}
  

Note : Replace ${org.springframework.version} with version number.