我可以使用 JasperReports API 创建主报告。但是,使用 JasperReports API 设计子报告并将其添加到主报表设计中时会遇到困难。
主报告JRXML
<band height="250" splitType="Stretch">
<subreport>
<reportElement isPrintRepeatedValues="false" x="0" y="0" width="550" height="233" isRemoveLineWhenBlank="true" backcolor="#000000">
</reportElement>
<dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{time})]]>
</dataSourceExpression>
<subreportExpression><![CDATA["subreport.jasper"]]></subreportExpression>
</subreport>
</band>
子报告JRXML
<field name="count" class="java.lang.String"/>
<field name="timeStamp" class="java.lang.String"/>
<group name="ProductGroup">
<groupExpression><![CDATA[$F{count}]]></groupExpression>
<groupHeader>
<band height="250">
<timeSeriesChart>
<chart evaluationTime="Report">
<reportElement x="0" y="25" width="550" height="175"/>
<chartTitle/>
<chartSubtitle/>
<chartLegend/>
</chart>
<timeSeriesDataset timePeriod="Minute">
<dataset incrementType="None"/>
<timeSeries>
<seriesExpression><![CDATA["Count"]]></seriesExpression>
<timePeriodExpression><![CDATA[new Date(Long.valueOf($F{timeStamp})*1000)]]></timePeriodExpression>
<valueExpression><![CDATA[Integer.valueOf($F{count})]]></valueExpression>
</timeSeries>
</timeSeriesDataset>
<timeSeriesPlot isShowLines="true" isShowShapes="false">
<plot/>
<timeAxisFormat>
<axisFormat>
<labelFont/>
<tickLabelFont/>
</axisFormat>
</timeAxisFormat>
<valueAxisFormat>
<axisFormat>
<labelFont/>
<tickLabelFont/>
</axisFormat>
</valueAxisFormat>
</timeSeriesPlot>
</timeSeriesChart>
</band>
</groupHeader>
</group>
这些独立的XML正在编译并将生成报告。
但是我想使用Jasper Report API创建这些。 我刚刚开始。但没有任何可用的例子就卡住了。
JRDesignSubreport jSubreport = new JRDesignSubreport(jasperDesign);
jSubreport.setUsingCache(false);
jSubreport.setRemoveLineWhenBlank(true);
JRDesignExpression subReportDataSourceExpr = new JRDesignExpression();
subReportDataSourceExpr.addResourceChunk("");
//How to set List Data Source?
JRDesignSubreportParameter subReportDataSource = new JRDesignSubreportParameter();
subReportDataSource.setExpression(subReportDataSourceExpr);
jSubreport.setDataSourceExpression(subReportDataSourceExpr);
//How to Add <subreportExpression><![CDATA["subreport.jasper"]]></subreportExpression>
答案 0 :(得分:3)
这可以如下完成 将子报告放在一个乐队中,然后将乐队附加到主报告
band = new JRDesignBand();
band.setHeight(250);
band.setSplitType(SplitTypeEnum.STRETCH);
JRDesignSubreport jSubreport = new JRDesignSubreport(jasperDesign);
jSubreport.setUsingCache(false);
jSubreport.setRemoveLineWhenBlank(true);
jSubreport.setPrintRepeatedValues(false);
JRDesignExpression expression = new JRDesignExpression();
expression.setText("new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{time})");
jSubreport.setDataSourceExpression(expression);
expression = new JRDesignExpression();
expression.setText("\"/path/to/sub.jasper\"");
jSubreport.setExpression(expression);
band.addElement(jSubreport);