无法使用jasper报告在xls文档中显示图表
我是jasper reports新手。 我可以通过贾斯珀报告将数据导出到Excel工作表。 当我在iReports创build饼图时，它在预览中显示。 当我在jsp文件中编写下面的代码来查看JasperViewer报告时，它会显示数据和图表。 但是，当我试图保存该文档（即在JasperViewer中，它提供了许多方式保存PDF或RTF或XLS的报告）作为XLS，然后错误来到控制台
net.sf.jasperreports.engine.JRException: The cell cannot be added.
但是，当我从.jrxml文件中删除图表，然后我能够导出数据到Excel文件。 我也读了一些在Excel文档中将JR图表作为图像插入的地方。 但是xls文件没有拍摄任何图像。 以下是我的JSP文件：
<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1" import="java.sql.*,java.util.*, net.sf.jasperreports.engine.*,java.io.*, net.sf.jasperreports.engine.design.*, net.sf.jasperreports.view.JasperViewer" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> <title>Insert title here</title> </head> <body> <% try{ Class.forName("com.mysql.jdbc.Driver"); Connection con=DriverManager.getConnection("jdbc:mysql://localhost:3309/jasperdb", "root", "root"); FileInputStream fis=new FileInputStream(new File("C://Documents and Settings//james//report1.jrxml")); JasperReport jasperreport=JasperCompileManager.compileReport(fis); JasperPrint jasperprint=JasperFillManager.fillReport(jasperreport,null,con); JasperViewer jv=new JasperViewer(jasperprint,false); jv.setTitle("test"); jv.setIconImage(null); jv.setVisible(true); }catch(Exception ex){ ex.printStackTrace(); } %> </body> </html>
jsp加载时输出 ： 
当我点击保存button，selectxls作为我的报告保存，然后在控制台中出现以下错误：
net.sf.jasperreports.engine.JRException: The cell cannot be added. at net.sf.jasperreports.engine.export.JRXlsExporter.exportImage(JRXlsExporter.java:1683) at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportPage(JRXlsAbstractExporter.java:1047) at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportReportToStream(JRXlsAbstractExporter.java:831) at net.sf.jasperreports.engine.export.JRXlsAbstractExporter.exportReport(JRXlsAbstractExporter.java:678) at net.sf.jasperreports.view.save.JRSingleSheetXlsSaveContributor.save(JRSingleSheetXlsSaveContributor.java:123) at net.sf.jasperreports.swing.JRViewerToolbar.btnSaveActionPerformed(JRViewerToolbar.java:406) at net.sf.jasperreports.swing.JRViewerToolbar$1.actionPerformed(JRViewerToolbar.java:136) at javax.swing.AbstractButton.fireActionPerformed(Unknown Source) at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source) at javax.swing.DefaultButtonModel.setPressed(Unknown Source) at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source) at java.awt.AWTEventMulticaster.mouseReleased(Unknown Source) at java.awt.Component.processMouseEvent(Unknown Source) at javax.swing.JComponent.processMouseEvent(Unknown Source) at java.awt.Component.processEvent(Unknown Source) at java.awt.Container.processEvent(Unknown Source) at java.awt.Component.dispatchEventImpl(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source) at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source) at java.awt.Container.dispatchEventImpl(Unknown Source) at java.awt.Window.dispatchEventImpl(Unknown Source) at java.awt.Component.dispatchEvent(Unknown Source) at java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.awt.EventQueue.access$000(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.awt.EventQueue$3.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.awt.EventQueue$4.run(Unknown Source) at java.security.AccessController.doPrivileged(Native Method) at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source) at java.awt.EventQueue.dispatchEvent(Unknown Source) at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.awt.EventDispatchThread.run(Unknown Source) Caused by: java.lang.NoClassDefFoundError: org/apache/commons/codec/digest/DigestUtils at org.apache.poi.hssf.usermodel.HSSFWorkbook.addPicture(HSSFWorkbook.java:1610) at net.sf.jasperreports.engine.export.JRXlsExporter.exportImage(JRXlsExporter.java:1667) ... 43 more Caused by: java.lang.ClassNotFoundException: org.apache.commons.codec.digest.DigestUtils at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1702) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1547) ... 45 more
这只是由于图表图像而发生的。 指导我如何将图表导出为xls文件中的图像和其余数据。
哦! 我是如此愚蠢。 在底部的控制台错误尖叫，并告诉类没有发现exceptionCaused by: java.lang.ClassNotFoundException: org.apache.commons.codec.digest.DigestUtils为了解决它，我下载了commons-codec-1.4.jar文件和放在web-inf lib文件夹中。 现在一切正常。