java.lang.NoClassDefFoundError: org/apache/commons/io/FileUtils

警告: Could not create JarEntryRevision for [jar:file:/D:/Workspaces/eclipse-jee/.metadata/.plugins/org.eclipse.wst.server.core/tmp1/wtpwebapps/struts2/WEB-INF/lib/struts2-core-2.2.3.jar]!
java.lang.NoClassDefFoundError: org/apache/commons/io/FileUtils

原因及解决:缺少下面3个包:

commons-io-2.0.1.jar

commons-lang3.jar

javassist-3.11.0.GA.jar

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