NoClassDefFoundError even after adding commons-lang3 library in Struts 2.3.24

I am working on a Struts 2 project.
I have used StrutsPrepareAndExecuteFilter .
I am using Eclipse IDE and Weblogic server 9.2.
I have added the following libraries to the lib folder of the project :

• commons-collections-3.1.jar
• commons-fileupload-1.3.1.jar
• commons-io-2.2.jar
• commons-lang-2.4.jar
• commons-logging-1.1.3.jar
• freemarker-2.3.22.jar
• javassist-3.11.0.GA.jar
• ognl-3.0.6.jar
• struts2-core-2.3.24.jar
• xwork-core-2.3.24.jar
• commons-lang3-3.2.jar

I have used ant build tool to build ear.
There are no errors during compilation time but when I deploy the ear, I get the following error

SEVERE: Could not load user
defined filter in web.xml: org.apache.struts2.dispatcher.ng.filter.StrutsPreparecuteFilter.
java.lang.NoClassDefFoundError: org/apache/commons/lang3/StringUtils
  at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.reg
XmlConfigurationProvider.java:213)

Even after adding commons-lang3 jar in the WEB-INF/lib folder of the project, why am I getting exception?
Do I need to add any jar to weblogic server?

Here I have included the commons-lang3-3.2.jar in the lib folder of the project so it is not a duplicate of the other question posted on stack overflow

I finally found that commons-lang3-3.2 jar is not supported in java 1.5. Instead commons-lang3-3.0 jar can be used with java 1.5.