iReport 交叉表问题 Try using an EmptyDataSource

error filling print... Not enough space to render the crosstab.
net.sf.jasperreports.engine.JRRuntimeException: Not enough space to render the crosstab.
    at net.sf.jasperreports.engine.fill.JRFillCrosstab$CrosstabFiller.fillVerticalCrosstab(JRFillCrosstab.java:896)
    at net.sf.jasperreports.engine.fill.JRFillCrosstab$CrosstabFiller.fill(JRFillCrosstab.java:858)
    at net.sf.jasperreports.engine.fill.JRFillCrosstab.prepare(JRFillCrosstab.java:492)
    at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:344)
    at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:346)
    at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:305)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:1382)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:692)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:255)
    at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:113)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:879)
    at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:782)
    at net.sf.jasperreports.engine.fill.JRFiller.fillReport(JRFiller.java:63)
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:402)
    at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:234)
    at it.businesslogic.ireport.IReportCompiler.run(IReportCompiler.java:947)
    at java.lang.Thread.run(Unknown Source)

Print was not filled. Try using an EmptyDataSource...

恶心的问题，问题所在：crosstable 控件只能放在summary 区域里面你放在detail里面没有提示的