java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputS

java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream
 at org.apache.commons.fileupload.disk.DiskFileItemFactory.createItem(DiskFileItemFactory.java:199)
 at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:361)
 at org.apache.struts2.dispatcher.multipart.JakartaMultiPartRequest.parse(JakartaMultiPartRequest.java:90)
 at org.apache.struts2.dispatcher.multipart.MultiPartRequestWrapper.<init>(MultiPartRequestWrapper.java:73)
 at org.apache.struts2.dispatcher.Dispatcher.wrapRequest(Dispatcher.java:698)
 at org.apache.struts2.dispatcher.FilterDispatcher.prepareDispatcherAndWrapRequest(FilterDispatcher.java:330)
 at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:390)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:394)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
 at java.lang.Thread.run(Thread.java:595)

 

解决方案:

原因是少了commons-io-1.3.2.jar包,添加进去即可..