报表集成到项目中，点击导出功能，excel文条件生成了，但是页面出现一个进度条一直在走，而且不停。后台报如下错误：
八月 18, 2016 4:07:06 下午 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet in context with path threw exception with root cause
java.lang.IllegalAccessError: tried to access method org.apache.poi.util.POILogger.log(ILjava/lang/Object;)V from class org.apache.poi.openxml4j.opc.ZipPackage
at org.apache.poi.openxml4j.opc.ZipPackage.saveImpl(ZipPackage.java:390)
at org.apache.poi.openxml4j.opc.OPCPackage.save(OPCPackage.java:1375)
at org.apache.poi.POIXMLDocument.write(POIXMLDocument.java:179)
at com.fr.io.exporter.Excel2007Exporter.export(Unknown Source)
at com.fr.io.exporter.Excel2007Exporter.export(Unknown Source)
at com.fr.io.exporter.ExcelExporter.exportFor2007(Unknown Source)
at com.fr.io.exporter.ExcelExporter.export(Unknown Source)
at com.fr.io.exporter.ExcelExporter.export(Unknown Source)
at com.fr.log.LogUtils.export(Unknown Source)
at com.fr.log.LogUtils.exportAndLogRecord(Unknown Source)
at com.fr.log.LogUtils.exportAndLogRecord(Unknown Source)
at com.fr.io.collection.ExportCollection.doExport(Unknown Source)
at com.fr.web.core.reserve.ExportService.dealWithExport(Unknown Source)
at com.fr.web.core.reserve.ExportService.process(Unknown Source)
at com.fr.stable.fun.impl.NoOPService.process(Unknown Source)
at com.fr.web.core.ReportDispatcher.dealWithOp(Unknown Source)
at com.fr.web.core.ReportDispatcher.dealWeblet(Unknown Source)
at com.fr.web.core.ReportDispatcher.dealWithRequest(Unknown Source)
at com.fr.web.BaseServlet.doGet(Unknown Source)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:624)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
。。。。。。。。。。
此问题我已经解决，发上来就是让以后遇到这个问题的人能很快找到解决方案，
