这是工作示例。
该样本的关键点:
public static void testBuildPdf() { try { Map<String, Object> params = new HashMap<String, Object>(); JasperReport jasperReport = JasperCompileManager.compileReport(reportSource); JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, getDataSource()); JasperExportManager.exportReportToPdfFile(jasperPrint, outputFileName); } catch (Exception e) { e.printStackTrace(); }}private static JRDataSource getDataSource() { Collection<BeanWithList> coll = new ArrayList<BeanWithList>(); coll.add(new BeanWithList(Arrays.asList("London", "Paris"), 1)); coll.add(new BeanWithList(Arrays.asList("London", "Madrid", "Moscow"), 2)); coll.add(new BeanWithList(Arrays.asList("Rome"), 3)); return new JRBeanCollectionDataSource(coll);}
JavaBean代码:
public class BeanWithList { // The member's name can be any. The JR engine is using public getter for extracting field's value private List<String> cities; private Integer id; public BeanWithList(List<String> cities, Integer id) { this.cities = cities; this.id = id; } // getter should be public public List<String> getCities() { return this.cities; } public Integer getId() { return this.id; }}
jrxml文件:
<?xml version="1.0" encoding="UTF-8"?><jasperReport ...> <subDataset name="dataset1"> <field name="city" > <fieldDescription><![CDATA[_THIS]]></fieldDescription> </field> </subDataset> <field name="id" /> <field name="cities" /> <title> <band height="103" splitType="Stretch"> <staticText> <reportElement x="138" y="28" width="258" height="20"/> <textElement textAlignment="Center" verticalAlignment="Middle"> <font isBold="true" isItalic="true"/> </textElement> <text><![CDATA[Bean with List sample]]></text> </staticText> </band> </title> <columnHeader> <band height="20"> <staticText> <reportElement x="0" y="0" width="100" height="20"/> <box> <topPen lineWidth="1.0"/> <leftPen lineWidth="1.0"/> <bottomPen lineWidth="1.0"/> <rightPen lineWidth="1.0"/> </box> <textElement textAlignment="Center" verticalAlignment="Middle"> <font isBold="true" isItalic="true" isUnderline="false"/> </textElement> <text><![CDATA[Id]]></text> </staticText> <staticText> <reportElement x="100" y="0" width="100" height="20"/> <box> <topPen lineWidth="1.0"/> <leftPen lineWidth="1.0"/> <bottomPen lineWidth="1.0"/> <rightPen lineWidth="1.0"/> </box> <textElement textAlignment="Center" verticalAlignment="Middle"> <font isBold="true" isItalic="true" isUnderline="false"/> </textElement> <text><![CDATA[City name]]></text> </staticText> </band> </columnHeader> <detail> <band height="20" splitType="Stretch"> <textField> <reportElement stretchType="RelativeToTallestObject" x="0" y="0" width="100" height="20"/> <box leftPadding="10"> <topPen lineWidth="1.0"/> <leftPen lineWidth="1.0"/> <bottomPen lineWidth="1.0"/> <rightPen lineWidth="1.0"/> </box> <textElement/> <textFieldexpression><![CDATA[$F{id}]]></textFieldexpression> </textField> <componentElement> <reportElement x="100" y="0" width="400" height="20"/> <jr:list xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd" printOrder="Vertical"> <datasetRun subDataset="dataset1"> <dataSourceexpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource($F{cities})]]></dataSourceexpression> </datasetRun> <jr:listContents height="20" width="400"> <textField> <reportElement x="0" y="0" width="100" height="20"/> <box leftPadding="10"> <topPen lineWidth="1.0"/> <leftPen lineWidth="1.0"/> <bottomPen lineWidth="1.0"/> <rightPen lineWidth="1.0"/> </box> <textElement/> <textFieldexpression><![CDATA[$F{city}]]></textFieldexpression> </textField> </jr:listContents> </jr:list> </componentElement> </band> </detail></jasperReport>
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