Jasperreport Excel文件创buildexception

我在jasper报告中创build.xls文件时遇到错误。 例外

Exception in thread "AWT-EventQueue-0" java.lang.NoSuchMethodError: org.apache.poi.hssf.usermodel.HSSFSheet.addMergedRegion(Lorg/apache/poi/hssf/util/CellRangeAddress;)I at net.sf.jasperreports.engine.export.JRXlsExporter.createMergeRegion(JRXlsExporter.java:596) at net.sf.jasperreports.engine.export.JRXlsExporter.initCreateCell(JRXlsExporter.java:540) at net.sf.jasperreports.engine.export.JRXlsExporter.createTextCell(JRXlsExporter.java:530) at net.sf.jasperreports.engine.export.JRXlsExporter.exportText(JRXlsExporter.java:390) at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportPage(JRXlsAbstractExporter.java:550) at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportReportToStream(JRXlsAbstractExporter.java:423) at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportReport(JRXlsAbstractExporter.java:207) at net.sf.jasperreports.view.save.JRSingleSheetXlsSaveContributor.save(JRSingleSheetXlsSaveContributor.java:112) at net.sf.jasperreports.view.JRViewer.btnSaveActionPerformed(JRViewer.java:1128) at net.sf.jasperreports.view.JRViewer$3.actionPerformed(JRViewer.java:668) at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995) at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318) at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387) at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242) at 

码

 File reportFile = new File("C:/Documents and Settings...../report1.jrxml"); JasperDesign jasperDesign = JRXmlLoader.load(reportFile); JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign); JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, null, conn); JasperViewer jv = new JasperViewer(jasperPrint); 

但我可以生成其他types的报告文件。在这个excell文件正在生成，但数据不在文件中，我使用jasperreports.jar文件。这是由于我认为不赞成。我怎样才能解决这个问题？