java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/RichTextString at org.primefaces.component.export.ExporterFactory.getExporterForType

Question

I used the same sample code Primefaces has in its web page:

Answer 1

Try to to put this jar file.I show the link,because i solved this problem.

http://apache.mirrors.pair.com/poi/release/bin/poi-bin-3.9-20121203.zip