java.lang.NoClassDefFoundError: org/apache/poi/ss/usermodel/RichTextString at org.primefaces.component.export.ExporterFactory.getExporterForType
问题 I used the same sample code Primefaces has in its web page: <h:commandLink value="Excel"> <p:dataExporter type="xls" target="dataTable" fileName="boo" pageOnly="true"/> </h:commandLink> But does not work. In Internet Explorer browser gives the following message: Details of the errors of the web page Message: Unexpected call to method or property access. Nothing ever happens in Mozilla Firefox. What might be happening? 回答1: javax.servlet.ServletException: org/apache/poi/ss/usermodel