我练习使用report3.7时无法显示结果

qianlong_nn 2010-10-22 11:46:46

Time zone: Default
Error filling print... Error incrementing crosstab dataset
net.sf.jasperreports.engine.JRRuntimeException: Error incrementing crosstab dataset at net.sf.jasperreports.engine.fill.JRFillCrosstab$JRFillCrosstabDataset.customIncrement(JRFillCrosstab.java:762) at net.sf.jasperreports.engine.fill.JRFillElementDataset.increment(JRFillElementDataset.java:193) at net.sf.jasperreports.engine.fill.JRCalculator.calculateVariables(JRCalculator.java:162) at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:744) at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:269) at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:127) at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:942) at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:841) at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:58) at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:417) at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:247) at com.jaspersoft.ireport.designer.compiler.IReportCompiler.run(IReportCompiler.java:877) at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572) at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997) Caused by: net.sf.jasperreports.engine.JRException: Crosstab data has already been processed. at net.sf.jasperreports.crosstabs.fill.calculation.BucketingService.addData(BucketingService.java:301) at net.sf.jasperreports.engine.fill.JRFillCrosstab$JRFillCrosstabDataset.customIncrement(JRFillCrosstab.java:758) ... 13 more
Print not filled. Try to use an EmptyDataSource...

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