<subreportExpression><![CDATA["subReport.jasper"]]></subreportExpression>
在 mainReport.jasper 中，我的目标是包含具有不可预测的列数的表。如果列数已知，我可以简单地利用 JasperSoft 的内置表格。但是，由于列数未知，我选择使用 Dynamic Jasper 库。按照“这个建议”，我成功创建了一个动态 Jasper 报告。现在，我的目标是将这个 Dynamic Jasper 报告集成到我的 mainReport 中。我尝试将此动态 Jasper 报告作为参数传递给 mainReport，但遇到了错误。谁能提供有关如何将动态 Jasper 报告合并到 mainReport 中的指导吗？<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.12.2.final using JasperReports Library version 6.12.2-75c5e90a222ab406e416cbf590a5397028a52de3 -->
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="ncPareto" pageWidth="595" pageHeight="792" whenNoDataType="AllSectionsNoDetail" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="3a2d19d1-8c22-4eb3-a2d0-8ddff71bdb55">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<import value="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"/>
<style name="BoldFont" isBold="true"/>
<parameter name="anotherSubreportDataSource" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"/>
<parameter name="companyLogo" class="java.awt.image.BufferedImage"/>
<parameter name="dynamiJasperReport" class="java.lang.Object"/>
<parameter name="dynamiJasperReportData" class="java.util.Collection"/>
<queryString>
<![CDATA[]]>
</queryString>
<group name="ReportContents" isReprintHeaderOnEachPage="true">
<groupHeader>
<band height="24">
<subreport overflowType="Stretch">
<reportElement positionType="Float" x="0" y="0" width="555" height="20" uuid="c8d669fb-85eb-42d5-8b00-b02e2bcd8e26">
<property name="com.jaspersoft.studio.unit.width" value="px"/>
<property name="com.jaspersoft.studio.unit.height" value="px"/>
</reportElement>
<dataSourceExpression><![CDATA[$P{anotherSubreportDataSource}]]></dataSourceExpression>
<subreportExpression><![CDATA["anotherSubreport.jasper"]]></subreportExpression>
</subreport>
</band>
</groupHeader>
</group>
<title>
<band height="275" splitType="Stretch">
<property name="com.jaspersoft.studio.unit.height" value="px"/>
<textField pattern="MMMMM dd, yyyy HH:mm">
<reportElement x="0" y="80" width="130" height="18" uuid="08f30fa9-efb3-4215-bfc9-e7a82c503f5c"/>
<textElement>
<font size="12"/>
</textElement>
<textFieldExpression><![CDATA[new java.util.Date()]]></textFieldExpression>
</textField>
<image>
<reportElement x="0" y="0" width="551" height="81" uuid="565dabb7-52e2-4462-9653-c70ae0fef6b9"/>
<imageExpression><![CDATA[$P{companyLogo}]]></imageExpression>
</image>
<subreport>
<reportElement positionType="Float" x="0" y="255" width="555" height="20" isRemoveLineWhenBlank="true" uuid="243c105e-4ccc-4e8b-952b-5cef05cbf648">
<property name="com.jaspersoft.studio.unit.width" value="px"/>
<property name="com.jaspersoft.studio.unit.height" value="px"/>
<property name="com.jaspersoft.studio.unit.y" value="px"/>
</reportElement>
<dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($P{dynamiJasperReportData})]]></dataSourceExpression>
<subreportExpression><![CDATA[$P{dynamiJasperReport}]]></subreportExpression>
</subreport>
</band>
</title>
</jasperReport>
这里的 dynamiJasperReport 是使用 Dynamic Jasper 库创建的 Dynamic Jasper 报告。 dynamiJasperReportData 保存着 dynami Jasper Report 的数据。这是我们填写 mainReport 的方式
Map parameters = new HashMap();
parameters.put("companyLogo", image);
parameters.put("dynamiJasperReport", pair.getLeft() );
parameters.put("dynamiJasperReportData", pair.getRight());
parameters.put("anotherSubreportDataSource", anotherSubreportDataSource);
JasperPrint jasperPrint = JasperFillManager.fillReport(compiledReportFilePath, parameters,
new JREmptyDataSource());
System.out.println("Report filling time : " + (System.currentTimeMillis() - start));
if ("PDF".equals(request.getExportType())) {
reportService.exportToPdf(jasperPrint, response, "MainReport.pdf");
}
这里compileReportFilePath = "C:\Report\mainReport.jasper这是我创建动态 Jasper 报告的方法
public Pair<JasperReport, Collection> createSubReportForHTMLTable(String htmlTable) throws Exception {
if (htmlTable == null || htmlTable.isEmpty()) {
return null;
}
try {
Document doc = Jsoup.parse(htmlTable);
Elements tables = doc.select("table");
if (tables == null || tables.isEmpty()) {
return null;
}
// Get first table ignore others
Element table = tables.get(0);
//Get all rows
Elements rows = table.select("tr");
ArrayList<String> columnName = new ArrayList<>();
Elements headerRow = rows.get(0).select("th, td");
for (Element header : headerRow) {
columnName.add(header.text().replace("\"", "'") + "aa");
}
DynamicReportBuilder reportBuilder = new DynamicReportBuilder();
Style rowStyle = new Style();
rowStyle.setBorderTop(Border.THIN());
rowStyle.setBorderBottom(Border.THIN());
rowStyle.setBorderLeft(Border.THIN());
rowStyle.setBorderRight(Border.THIN());
for (String column : columnName) {
AbstractColumn columnBuilder = ColumnBuilder.getNew()
.setColumnProperty(column, String.class.getName())
.setTitle(column)
.setWidth(100)
.setStyle(rowStyle)
.setHeaderStyle(rowStyle)
.build();
reportBuilder.addColumn(columnBuilder);
}
DynamicReport dynamicReport = reportBuilder.build();
List<Map<String, String>> dataList = new ArrayList<>();
for (int i = 0; i < rows.size(); i++) {
Elements columns = rows.get(i).select("td");
Map<String, String> data = new HashMap<>();
for (int j = 0; j < columns.size(); j++) {
data.put(columnName.get(j), columns.get(j).text().replace("\"", "'") + "aa");
}
dataList.add(data);
}
Collection collection = new ArrayList<>(dataList);
JRDataSource dataSource = new JRBeanCollectionDataSource(collection);
JasperReport jasperReport = DynamicJasperHelper.generateJasperReport(dynamicReport, new ClassicLayoutManager(), new HashMap<>());
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, new HashMap<>(), dataSource);
JasperViewer.viewReport(jasperPrint);
return new Pair<>(jasperReport, collection);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
你很接近。与每个子报表一样，您需要告诉主报表如何提供子报表的数据源。
您可以查看dynamicjasper子报告示例，它可以提示您可能缺少哪些部分。
此外，DynamicJasperHelper.generateJasperReport(...) 方法可以为您提供有关如何连接报表和子报表的提示。
除了上述内容之外，您还可以将 DJ 与“模板”一起使用，根据您的用例，您可能会设法将“非动态”信息放入某些模板带中。
或者，您可以使用“串联报告技术”，其中第一个报告是您的主报告，然后串联 DJ 报告，以某种方式模仿子报告输出。