在JasperReports中没有多少经验,但这是我的第二个任务,我坚持这个问题
以下是我的Java bean类Report和ReportRecords,
Class Report{
private String field1;
private String field2;
private String field3;
private String field4;
List<ReportRecords> reportRecordData = new ArrayList<>();
....setters getters()....
}
Class ReportRecords{
private String column1;
private String column2;
private String column3;
private String column4;
....setters getters()....
}
我正在导出如下报告,
List<Report> report = getReports();
JRBeanCollectionDataSource beanColDataSource = new JRBeanCollectionDataSource(report);
Map<String, Object> parameters = new HashMap<String, Object>();
JasperPrint printFileName = JasperFillManager.fillReport(template, parameters, beanColDataSource);
JRTextExporter txtExporter = new JRTextExporter();
txtExporter.setParameter(JRTextExporterParameter.LINE_SEPARATOR, "\r\n");
txtExporter.setParameter(JRTextExporterParameter.PAGE_WIDTH, 110);
txtExporter.setParameter(JRTextExporterParameter.PAGE_HEIGHT, 80);
txtExporter.setParameter(JRExporterParameter.JASPER_PRINT, printFileName);
txtExporter.setParameter(JRExporterParameter.OUTPUT_FILE_NAME, "C:/report/report.txt");
txtExporter.setParameter(JRTextExporterParameter.CHARACTER_WIDTH,new Float(7));
txtExporter.setParameter(JRTextExporterParameter.CHARACTER_HEIGHT,new Float(13));
txtExporter.exportReport();
以下是Jasper代码,我删除了其他与标签相关的代码,并在此处仅添加了必要的代码,
<subDataset name="serviceCodeData" uuid="6b6aa9cd-83d1-47b6-b475-2988e1a3a804">
<queryString>
<![CDATA[]]>
</queryString>
<field name="column1" class="java.lang.String"/>
<field name="column2" class="java.lang.String"/>
<field name="column3" class="java.lang.String"/>
<field name="column4" class="java.lang.String"/>
</subDataset>
<field name="Field1" class="java.lang.String"/>
<field name="Field2" class="java.lang.String"/>
<field name="Field3" class="java.lang.String"/>
<field name="Field4" class="java.lang.String"/>
<pageHeader>
<!-- All Field1 to Field4 labels and values -->
</pageHeader>
<columnHeader>
<!-- All column1 to column2 labels -->
</columnHeader>
And below is the list for column values
<detail>
<band height="19" splitType="Stretch">
<componentElement>
<reportElement x="-19" y="0" width="818" height="19" uuid="d08327de-369c-41b5-818a-2381d0f7def2"/>
<jr:list xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd" printOrder="Vertical">
<datasetRun subDataset="reportRecordData" uuid="f39ce5d6-7347-4911-b211-3c60cbd01590">
<dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{reportRecordData})]]></dataSourceExpression>
</datasetRun>
<jr:listContents height="19" width="818">
<textField>
<reportElement x="39" y="0" width="157" height="18" uuid="03ef5ad6-fafb-4c5d-aa41-a46b1474f9fd"/>
<textElement textAlignment="Left"/>
<textFieldExpression><![CDATA[$F{column1}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="39" y="0" width="157" height="18" uuid="03ef5ad6-fafb-4c5d-aa41-a46b1474f9fd"/>
<textElement textAlignment="Left"/>
<textFieldExpression><![CDATA[$F{column2}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="39" y="0" width="157" height="18" uuid="03ef5ad6-fafb-4c5d-aa41-a46b1474f9fd"/>
<textElement textAlignment="Left"/>
<textFieldExpression><![CDATA[$F{column3}}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="39" y="0" width="157" height="18" uuid="03ef5ad6-fafb-4c5d-aa41-a46b1474f9fd"/>
<textElement textAlignment="Left"/>
<textFieldExpression><![CDATA[$F{column4}]]></textFieldExpression>
</textField>
</jr:listContents>
</jr:list>
</componentElement>
</band>
</detail>
报告应该生成如下,
但它生成如下,它将所有List合并到一个Report对象,
请询问是否需要有任何其他详细信息,请帮助我。
答案 0 :(得分:1)
Jasper Reports的逻辑是首先生成pageHeader
,columnHeader
(每页调用一次),然后迭代数据源上的detail
频段。
这就是您获得当前结果的原因。当您处于记录1时,将创建pageHeader
,columnHeader
,然后在数据源上调用详细信息带中的列表两次。
您应该将Report, Field1,.. Field4
移动到详细信息区,因此这些也会显示为迭代数据源。