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How to fill JasperReports report using spring data Jpa native query?

I am trying to fill the jasper report using customized sql qyery but I am getting this error:-
java.lang.NoSuchMethodException: Unknown property 'vehicle_class' on class 'class [Ljava.lang.Object;'
at org.apache.commons.beanutils.PropertyUtilsBean.getSimpleProperty(PropertyUtilsBean.java:1270) ~[commons-beanutils-1.9.4.jar:1.9.4]
at org.apache.commons.beanutils.PropertyUtilsBean.getNestedProperty(PropertyUtilsBean.java:809) ~[commons-beanutils-1.9.4.jar:1.9.4]
at org.apache.commons.beanutils.PropertyUtilsBean.getProperty(PropertyUtilsBean.java:885) ~[commons-beanutils-1.9.4.jar:1.9.4]
at org.apache.commons.beanutils.PropertyUtils.getProperty(PropertyUtils.java:464) ~[commons-beanutils-1.9.4.jar:1.9.4]
at net.sf.jasperreports.engine.data.JRAbstractBeanDataSource.getBeanProperty(JRAbstractBeanDataSource.java:185) ~[jasperreports-6.17.0.jar:6.17.0-6d93193241dd8cc42629e188b94f9e0bc5722efd]
at net.sf.jasperreports.engine.data.JRAbstractBeanDataSource.getFieldValue(JRAbstractBeanDataSource.java:170) ~[jasperreports-6.17.0.jar:6.17.0-6d93193241dd8cc42629e188b94f9e0bc5722efd]
This is my Jasper File
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.17.0.final using JasperReports Library version 6.17.0-6d93193241dd8cc42629e188b94f9e0bc5722efd -->
<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="ViolationClassAndAverageSpeed" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="dcaca94b-6e83-47dc-bd14-baca011b1845">
<style name="Table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="Dataset1" uuid="1f3f11d6-c688-4625-b387-2808efd481fc">
<queryString language="SQL">
<![CDATA[SELECT vehicle_class, COUNT(*)/SUM(1e0/speed) AS speed FROM violations GROUP BY vehicle_class]]>
</queryString>
<field name="vehicle_class" class="java.lang.String"/>
<field name="speed" class="java.lang.Double"/>
<group name="vehicle_class">
<groupExpression><![CDATA[$F{vehicle_class}]]></groupExpression>
</group>
</subDataset>
<queryString language="SQL">
<![CDATA[SELECT vehicle_class, COUNT(*)/SUM(1e0/speed) AS speed FROM violations GROUP BY vehicle_class]]>
</queryString>
<field name="vehicle_class" class="java.lang.String"/>
<field name="speed" class="java.lang.Double"/>
<group name="vehicle_class">
<groupExpression><![CDATA[$F{vehicle_class}]]></groupExpression>
</group>
<detail>
<band height="349" splitType="Stretch">
<componentElement>
<reportElement x="10" y="10" width="200" height="200" uuid="5df1aded-bce1-4d9a-8c73-1950d7161a02">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
</reportElement>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="Dataset1" uuid="a331d750-4a48-46e4-9f1c-cac4cfbf2e72">
<connectionExpression><![CDATA[$P{REPORT_CONNECTION}]]></connectionExpression>
</datasetRun>
<jr:column width="100" uuid="4545a2e7-6253-4848-a00b-063337993b35">
<jr:tableHeader style="Table_TH" height="30"/>
<jr:tableFooter style="Table_TH" height="30"/>
<jr:groupHeader groupName="vehicle_class">
<jr:cell style="Table_CH" height="30"/>
</jr:groupHeader>
<jr:groupFooter groupName="vehicle_class">
<jr:cell style="Table_CH" height="30"/>
</jr:groupFooter>
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="100" height="30" uuid="ec2d5ab9-d65e-4485-acbc-a41aad6097d8"/>
<text><![CDATA[vehicle_class]]></text>
</staticText>
</jr:columnHeader>
<jr:columnFooter style="Table_CH" height="30"/>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="100" height="30" uuid="b46de1f3-0544-4e4b-a52e-0d46e5884010"/>
<textFieldExpression><![CDATA[$F{vehicle_class}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="100" uuid="fdb570b8-20de-42d9-ba5a-38f593535eb7">
<jr:tableHeader style="Table_TH" height="30"/>
<jr:tableFooter style="Table_TH" height="30"/>
<jr:groupHeader groupName="vehicle_class">
<jr:cell style="Table_CH" height="30"/>
</jr:groupHeader>
<jr:groupFooter groupName="vehicle_class">
<jr:cell style="Table_CH" height="30"/>
</jr:groupFooter>
<jr:columnHeader style="Table_CH" height="30">
<staticText>
<reportElement x="0" y="0" width="100" height="30" uuid="2c555423-d793-45d4-96f0-e9603c6edac6"/>
<text><![CDATA[speed]]></text>
</staticText>
</jr:columnHeader>
<jr:columnFooter style="Table_CH" height="30"/>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="100" height="30" uuid="f5539efd-3550-4a93-9df1-3e172ce72d6a"/>
<textFieldExpression><![CDATA[$F{speed}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
</jasperReport>
Repository
#Repository
public interface ViolationRepository extends JpaRepository<Violation, Long>{
#Query(value = "SELECT vehicle_class, COUNT(*)/SUM(1e0/speed) AS avg_speed FROM violations GROUP BY vehicle_class", nativeQuery = true)
List<Object> findCustomAll();
}
Controller Class
#RequestMapping( "/pdf")
public void getReportsinPDF(HttpServletResponse response) throws JRException, IOException {
InputStream jasperStream = (InputStream) this.getClass().getResourceAsStream("/ViolationClassAndAverageSpeed.jasper");
// Adding attribute names
Map<String, Object> params = new HashMap<>();
// Fetching the student from the data database.
final JRBeanCollectionDataSource source = new JRBeanCollectionDataSource(violationnService.getViolation());
JasperReport jasperReport = (JasperReport) JRLoader.loadObject(jasperStream);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params, source);
response.setContentType("application/x-pdf");
response.setHeader("Content-disposition", "inline; filename=ViolationList.pdf");
final ServletOutputStream outStream = response.getOutputStream();
JasperExportManager.exportReportToPdfStream(jasperPrint, outStream);
}
Entity Class
#Entity
#Table(name = "violations")
public class Violation {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
#Column(name = "violation_id")
private long violation_id;
#Column(name = "speed", length = 3)
private Integer speed;
#Column(name = "vehicle_class", length = 10)
private String vehicle_class;
public String getVehicle_class() {
return vehicle_class;
}
public void setVehicle_class(String vehicle_class) {
this.vehicle_class = vehicle_class;
}
public Integer getSpeed() {
return speed;
}
public void setSpeed(Integer speed) {
this.speed = speed;
}
}
Service Class:
#Service
public class ViolationService {
#Autowired
private ViolationRepository violationRepo;
public List<Object> getViolation() {
return violationRepo.findCustomAll();
}
}
I'm using jdbc adapter and I am trying to fill jasper report using this query in my repository
SELECT vehicle_class, COUNT(*)/SUM(1e0/speed) AS speed FROM violations GROUP BY vehicle_class
I removed field description from report but its still not worth it.

How to create nested table like jasper report?

I have been trying to create a jasper report which should look like the following image:
For my sample report, Out-1 and Out-2 are rows for the outer table and asd, asds, adasd are rows for the inner table.
I am trying to achieve it using nested tables. But the table takes the field and I can not assign field to the inner-table.
I am creating jasper reports in Java code rather than using SQL connection to the table for some reason.
JXML
<?xml version="1.0" encoding="UTF-8"?>
<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="report1" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="ec55a262-fec4-45f4-9b48-5be98088aafa">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<subDataset name="New Dataset 1" uuid="cdef25ec-abc4-45ba-b70e-28d82716626b">
<field name="sachNr" class="java.lang.String"/>
<field name="akundenNr" class="java.lang.String"/>
<field name="nestedTable" class="java.lang.String"/>
</subDataset>
<subDataset name="New Dataset 2" uuid="eec983aa-a227-4a28-9c44-73cbe31fa024">
<field name="packStNr" class="java.lang.String"/>
<field name="prodDatum" class="java.lang.String"/>
<field name="stueck" class="java.lang.String"/>
</subDataset>
<parameter name=" artikeldatenTable" class="java.lang.String"/>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="79" splitType="Stretch"/>
</title>
<pageHeader>
<band height="35" splitType="Stretch"/>
</pageHeader>
<columnHeader>
<band height="61" splitType="Stretch"/>
</columnHeader>
<detail>
<band height="125" splitType="Stretch">
<componentElement>
<reportElement key="table" x="0" y="28" width="360" height="50" uuid="fae14075-18a8-4fcc-b6f9-c14e3623e75d"/>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="New Dataset 1" uuid="17a10558-3a43-47c2-809d-6362924e5015">
<dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.JREmptyDataSource(1)]]></dataSourceExpression>
</datasetRun>
<jr:column width="137" uuid="7a8ca2ff-7a1a-41a0-8c30-b02f7be6e2b9">
<jr:tableHeader height="30" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="137" height="30" uuid="0fe0e502-dea8-45f6-9f96-633f5db90cd8"/>
<textFieldExpression><![CDATA[$F{sachNr}]]></textFieldExpression>
</textField>
</jr:tableHeader>
<jr:detailCell height="42" rowSpan="1">
<componentElement>
<reportElement key="table" x="0" y="0" width="137" height="42" uuid="9e72ca8c-182d-41c0-a021-98493162c7da"/>
<jr:table>
<datasetRun subDataset="New Dataset 2" uuid="7475e256-4bc5-4e88-be92-b6d2eb2fd4c5">
<dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.JREmptyDataSource()]]></dataSourceExpression>
</datasetRun>
<jr:column width="90" uuid="cd851138-c894-459f-91c9-636c3602b247">
<jr:detailCell height="20" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="90" height="20" uuid="ce21338e-c593-4bae-b7c4-08741127575c"/>
<textFieldExpression><![CDATA[$F{packStNr}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="90" uuid="5f2b25a9-e34a-4698-b1ab-e8843dafec3c">
<jr:detailCell height="20" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="90" height="20" uuid="5487305d-d22f-46fa-97bc-88e671f7085c"/>
<textFieldExpression><![CDATA[$F{prodDatum}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="90" uuid="93c28f55-9bda-4be0-989a-03ce573715ba">
<jr:detailCell height="20" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="90" height="20" uuid="53c4e2b3-7591-49b3-9b13-50cc1f16641a"/>
<textFieldExpression><![CDATA[$F{stueck}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</jr:detailCell>
</jr:column>
<jr:column width="90" uuid="f898d2e7-1c2f-48fe-9357-61ee5d767a51">
<jr:tableHeader height="30" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="90" height="30" uuid="16b70095-2900-46f0-96ec-d638edb784f3"/>
<textFieldExpression><![CDATA[$F{akundenNr}]]></textFieldExpression>
</textField>
</jr:tableHeader>
<jr:detailCell height="42" rowSpan="1"/>
</jr:column>
<jr:column width="111" uuid="0121d9c8-d1f0-447f-84ed-15385693a072">
<jr:tableHeader height="30" rowSpan="1"/>
<jr:detailCell height="42" rowSpan="1"/>
</jr:column>
<jr:column width="90" uuid="ca27e48c-a1d6-4c32-a1de-2580b6786b3d">
<jr:tableHeader height="30" rowSpan="1"/>
<jr:detailCell height="42" rowSpan="1"/>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
<columnFooter>
<band height="45" splitType="Stretch"/>
</columnFooter>
<pageFooter>
<band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
<band height="42" splitType="Stretch"/>
</summary>
</jasperReport>
Outer Table POJO
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
public class OuterTable {
private String sachNr;
private String akundenNr;
private String SUBREPORT_DIR;
private JRBeanCollectionDataSource nestedTable;
public String getSachNr() {
return sachNr;
}
public void setSachNr(String sachNr) {
this.sachNr = sachNr;
}
public String getAkundenNr() {
return akundenNr;
}
public void setAkundenNr(String akundenNr) {
this.akundenNr = akundenNr;
}
public String getSUBREPORT_DIR() {
return SUBREPORT_DIR;
}
public void setSUBREPORT_DIR(String sUBREPORT_DIR) {
SUBREPORT_DIR = sUBREPORT_DIR;
}
public JRBeanCollectionDataSource getNestedTable() {
return nestedTable;
}
public void setNestedTable(JRBeanCollectionDataSource nestedTable) {
this.nestedTable = nestedTable;
}
}
Inner Table POJO
public class InnerTable {
private String packStNr;
private String prodDatum;
private Integer stueck;
public String getPackStNr() {
return packStNr;
}
public void setPackStNr(String packStNr) {
this.packStNr = packStNr;
}
public String getProdDatum() {
return prodDatum;
}
public void setProdDatum(String prodDatum) {
this.prodDatum = prodDatum;
}
public Integer getStueck() {
return stueck;
}
public void setStueck(Integer stueck) {
this.stueck = stueck;
}
}
My Controller
private void generateLagerbestand(List<Artikeldaten> artikelList) throws JRException, FileNotFoundException {
JasperReport jasperReport;
Map<String, Object> parameters = new HashMap<String, Object>();
List <OuterTable> outerTableList = new ArrayList<OuterTable>();
for(int i = 0; i < artikelList.size(); i++) {
List <InnerTable> innerTableList = new ArrayList<InnerTable>();
List<Lager> lagersList = artikelList.get(i).getLagers();
for(int j = 0; j < lagersList.size(); j++) {
InnerTable innerTable = new InnerTable();
innerTable.setPackStNr(lagersList.get(j).getPackstnr());
innerTable.setProdDatum(lagersList.get(j).getProddatum().toString());
innerTable.setStueck(lagersList.get(j).getStueck());
innerTableList.add(innerTable);
}
OuterTable outerTable = new OuterTable();
outerTable.setAkundenNr(artikelList.get(i).getAkundennr());
outerTable.setSachNr(artikelList.get(i).getSachnr());
JRBeanCollectionDataSource nestedTable = new JRBeanCollectionDataSource(innerTableList);
outerTable.setNestedTable(nestedTable);
outerTableList.add(OuterTable);
}
try {
jasperReport = JasperCompileManager.compileReport("PathToMyReport\\MyReport.jrxml");
JRBeanCollectionDataSource outerTableItems = new JRBeanCollectionDataSource(outerTableList);
// artikeldatenTable is outerTable
parameters.put("artikeldatenTable", outerTableItems);
JREmptyDataSource jrEmptyDataSource = new JREmptyDataSource();
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, jrEmptyDataSource);
OutputStream outputStream = new FileOutputStream(new File("PathToMyPDF:\\MyPDF.pdf"));
JasperExportManager.exportReportToPdfStream(jasperPrint, outputStream);
} catch(Exception ex) {
ex.printStackTrace();
}
}

You are missing the concept of the detail band, the detail will iterate on the datasource you pass to report
JasperFillManager.fillReport(jasperReport, parameters, jrEmptyDataSource)
That's an empty datasource!, it will not iterate at all.
Instead, pass
JRBeanCollectionDataSource outerTableItems = new JRBeanCollectionDataSource(outerTableList);
To the report, define the fields of OuterTable in your main report (not a subDatasource) including nestedTable
<field name="nestedTable" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"/>
Then
In detail band you put textFields related to first level "Out-1" and "Out-2" in your example.
Bellow you add the jr:table component taking the datasource from the bean
<datasetRun subDataset="New Dataset 1" uuid="17a10558-3a43-47c2-809d-6362924e5015">
<dataSourceExpression><![CDATA[$F{nestedTable}]]></dataSourceExpression>
</datasetRun>
In general within the bean I would not have JRBeanCollectionDatasource but instead store the data in a normal List<>, the reason is that a JRDatasource is consumable you can only use it once, see this to understand better How to use same JRBeanCollectionDataSource on multiple sub reports?

Working with multiple data sources in jaspersoft studio

After being able to add custom data source from java bean to a report according to Add custom data source to Jaspersoft Studio , I get to the second point of my reporting with jasper.
I have a main report which uses a data base as its data source. Then I add a bean.xml data source to the report and add a table to the main report which uses this bean.xml data source to get java beans.
My goal is to get a field value from the main report and manipulate
its value, then fill the beans with these values and at last fill the
table with the beans.
To do this I have written 3 classes which I use as Scriptlet in the table data set:
This is an illustration of what I need to do:
The problem is in FillTable class, when I us String kNFormelGG = (String) this.getParameterValue("gg"); the created bean.xml fails the test connection with java.lang.reflect.InvocationTargetException
Caused by: java.lang.NullPointerException
at net.sf.jasperreports.engine.JRAbstractScriptlet.getParameterValue(JRAbstractScriptlet.java:95)
at net.sf.jasperreports.engine.JRAbstractScriptlet.getParameterValue(JRAbstractScriptlet.java:86)
at org.iqtig.reporting.dataSource.bean.dataSourceXML.FillTable.fillTable(FillTable.java:45)
at org.iqtig.reporting.dataSource.bean.dataSourceXML.JRDataSourceFactory.createCollection(JRDataSourceFactory.java:27)
... 34 more
If I assign a fix value like String kNFormelGG ="Test me" the bean connection encounters no error and after assigning bean.xml as the value for Default Data Adapter in Dataset1 it fills the table with static values.
How can get the data from a parameter or a value dynamically from the main report data source and use it in beans?
I have this assumption that at the time of calling the static factory class from my adapter, the fields are still empty. Maybe I am wrong but I do not find any other declaration for this problem.
BeanFactory Class
import java.util.Collection;
import net.sf.jasperreports.engine.JRDefaultScriptlet;
import net.sf.jasperreports.engine.JRScriptletException;
/**
* Factory for TableCellsBean Klasse
*
* #author iman.gharib
*/
public class JRDataSourceFactory extends JRDefaultScriptlet {
/**
* #return collection der TableCellsBean Objekten
* #throws JRScriptletException
*/
public static Collection<TableCellsBean> createCollection()
throws JRScriptletException {
FillTable ft = new FillTable();
Collection<TableCellsBean> reportRows = ft.fillTable();
return reportRows;
}
}
Bean Class
public class TableCellsBean {
private String fieldName;
private String keyFormel;
private String mK;
private String notation;
private String item;
/**
* Constructor.
*
* #param fieldName
* #param keyFormel
* #param mK
* #param notation
* #param item
*/
public TableCellsBean(final String fieldName, final String keyFormel, final String mK, final String notation, final String item) {
this.fieldName = fieldName;
this.keyFormel = keyFormel;
this.mK = mK;
this.notation = notation;
this.item = item;
}
/**
* Constructo Leer
*/
public TableCellsBean() {
}
public TableCellsBean getme() {
return this;
}
// getter and setters
}
Class for preparing and creating beans
public class FillTable extends JRDefaultScriptlet {
#Override
public void afterColumnInit()
throws JRScriptletException {
fillTable();
}
public ArrayList<String> splitGGArray(final String kNFormelGG) {
ArrayList<String> fieldNames = new ArrayList<>();
String[] array = (kNFormelGG.split(" "));
for (String sub : array) {
fieldNames.add(sub);
}
return fieldNames;
}
public Collection<TableCellsBean> fillTable()
throws JRScriptletException {
// gg is a parameter for table dataset. It is mapped to KN_FormelGG
// which comes from the main report data base
String kNFormelGG = (String) this.getParameterValue("gg");
List<TableCellsBean> listTableCells = new ArrayList<>();
// TableCellsBean tableCell = new TableCellsBean();
for (String fn : splitGGArray(kNFormelGG)) {
listTableCells.add(new TableCellsBean(fn, fn, fn, fn, fn));
// listTableCells.add(tableCell);
}
// JRBeanCollectionDataSource tableCellJRBean = new JRBeanCollectionDataSource(listTableCells);
// Map<String, Object> parameters = new HashMap<>();
// parameters.put("FieldDataSource", tableCellJRBean);
return listTableCells;
}
}
JRXML
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.3.0.final using JasperReports Library version 6.3.0 -->
<!-- 2016-08-08T14:30:03 -->
<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="main" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="4f1480cf-f8f9-420f-96b4-7fc1e41e791b">
<property name="com.jaspersoft.studio.data.sql.tables" value=""/>
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="QIDBReport"/>
<style name="Table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="Table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
<topPen lineWidth="0.5" lineColor="#000000"/>
<leftPen lineWidth="0.5" lineColor="#000000"/>
<bottomPen lineWidth="0.5" lineColor="#000000"/>
<rightPen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="Dataset1" uuid="5677929d-813b-4d39-828c-de966a9d7689">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="bean.xml"/>
<property name="net.sf.jasperreports.data.adapter" value="bean.xml"/>
<scriptlet name="Scriptlet_1" class="org.iqtig.reporting.dataSource.bean.mapBeanAsDatasource.JRDataSourceFactory"/>
<parameter name="gg" class="java.lang.String"/>
<field name="item" class="java.lang.String">
<fieldDescription><![CDATA[item]]></fieldDescription>
</field>
<field name="fieldName" class="java.lang.String">
<fieldDescription><![CDATA[fieldName]]></fieldDescription>
</field>
<field name="me" class="org.iqtig.reporting.dataSource.bean.dataSourceXML.TableCellsBean">
<fieldDescription><![CDATA[me]]></fieldDescription>
</field>
<field name="keyFormel" class="java.lang.String">
<fieldDescription><![CDATA[keyFormel]]></fieldDescription>
</field>
<field name="mK" class="java.lang.String">
<fieldDescription><![CDATA[mK]]></fieldDescription>
</field>
</subDataset>
<parameter name="LB_ID" class="java.lang.Integer">
<defaultValueExpression><![CDATA[62]]></defaultValueExpression>
</parameter>
<parameter name="KN_OffeziellGruppe" class="java.lang.Integer">
<defaultValueExpression><![CDATA[3]]></defaultValueExpression>
</parameter>
<parameter name="FieldDataSource" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource" isForPrompting="false"/>
<parameter name="KN_FormelGG" class="java.lang.String" isForPrompting="false"/>
<queryString>
<![CDATA[select * from "KennzahlReferenz2015_QIBericht", "Images"
where LB_ID = $P{LB_ID}
and KN_OffiziellGruppe = $P{KN_OffeziellGruppe}
and IMG_ID = 1]]>
</queryString>
<field name="QI_Praefix" class="java.lang.String"/>
<field name="KN_Id" class="java.lang.Integer"/>
<field name="bewertungsArtTypNameKurz" class="java.lang.String"/>
<field name="refbereich" class="java.lang.String"/>
<field name="refbereichVorjahres" class="java.lang.String"/>
<field name="KN_GGAlleinstehend" class="java.lang.String"/>
<field name="erlaueterungDerRechregeln" class="java.lang.String"/>
<field name="teildatensatzbezug" class="java.lang.String"/>
<field name="mindesanzahlZaeler" class="java.lang.Integer"/>
<field name="mindesanzahlNenner" class="java.lang.Integer"/>
<field name="KN_FormelZ" class="java.lang.String"/>
<field name="KN_FormelGG" class="java.lang.String"/>
<field name="verwendeteFunktionen" class="java.lang.String"/>
<field name="idLb" class="java.lang.String"/>
<field name="LB_LangBezeichnung" class="java.lang.String"/>
<field name="LB_ID" class="java.lang.Integer"/>
<field name="nameAlleinstehend" class="java.lang.String"/>
<field name="KN_BezeichnungAlleinstehendKurz" class="java.lang.String"/>
<field name="QI_ID" class="java.lang.Integer"/>
<field name="IMG_ID" class="java.lang.Integer"/>
<field name="Name" class="java.lang.String"/>
<field name="Image" class="java.lang.Object"/>
<group name="id" isStartNewPage="true">
<groupExpression><![CDATA[$F{KN_Id}]]></groupExpression>
<groupHeader>
<band height="44"/>
</groupHeader>
<groupFooter>
<band height="50"/>
</groupFooter>
</group>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="44" splitType="Stretch"/>
</title>
<pageHeader>
<band height="35" splitType="Stretch"/>
</pageHeader>
<columnHeader>
<band height="34" splitType="Stretch"/>
</columnHeader>
<detail>
<band height="149" splitType="Stretch">
<componentElement>
<reportElement x="170" y="20" width="350" height="100" uuid="38d917fb-dfc2-4c08-890a-09cfe6e2214d">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.table.style.table_header" value="Table_TH"/>
<property name="com.jaspersoft.studio.table.style.column_header" value="Table_CH"/>
<property name="com.jaspersoft.studio.table.style.detail" value="Table_TD"/>
<property name="net.sf.jasperreports.export.headertoolbar.table.name" value=""/>
<property name="com.jaspersoft.studio.components.autoresize.proportional" value="true"/>
</reportElement>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd" whenNoDataType="AllSectionsNoDetail">
<datasetRun subDataset="Dataset1" uuid="1b3548f6-7d6b-4070-bb8e-aaefbabdc7c9">
<datasetParameter name="gg">
<datasetParameterExpression><![CDATA[$F{KN_FormelGG}]]></datasetParameterExpression>
</datasetParameter>
</datasetRun>
<jr:column width="70" uuid="048812d7-0ed1-4db8-a09a-e6242f77c6ce">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column1"/>
<jr:tableHeader style="Table_TH" height="30" rowSpan="1"/>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="70" height="30" uuid="c5aaea84-1367-41df-be8d-7f71e3ea5153"/>
<textFieldExpression><![CDATA[$F{item}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="70" uuid="11b85ada-c9fe-42b6-a646-8bd1697cdec2">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column2"/>
<jr:tableHeader style="Table_TH" height="30" rowSpan="1"/>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="70" height="30" uuid="728ff44d-1dbd-404c-b8b3-7cc0e1f07f60"/>
<textFieldExpression><![CDATA[$F{fieldName}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="70" uuid="892f30cb-fb41-444f-889b-1e005484c35e">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column3"/>
<jr:tableHeader style="Table_TH" height="30" rowSpan="1"/>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="70" height="30" uuid="e38ac951-71bc-45a6-8ed2-313805a77050"/>
<textFieldExpression><![CDATA[$F{keyFormel}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="70" uuid="7d0d700a-5a75-4c26-94c0-9ef7c53bd719">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column4"/>
<jr:tableHeader style="Table_TH" height="30" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="70" height="30" uuid="68577007-0344-406c-8aa2-3127d1da1c65"/>
</textField>
</jr:tableHeader>
<jr:detailCell style="Table_TD" height="30">
<textField>
<reportElement x="0" y="0" width="70" height="30" uuid="873d63c1-1b91-4441-b7bd-f67db7729e7f"/>
<textFieldExpression><![CDATA[$F{mK}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="70" uuid="cf5a1a2f-594d-429f-8925-62d001e1dd00">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column5"/>
<jr:tableHeader style="Table_TH" height="30" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="70" height="30" uuid="7fb46eb8-d0e1-44ab-89f9-ec31d49b8109"/>
<textFieldExpression><![CDATA[$P{gg}]]></textFieldExpression>
</textField>
</jr:tableHeader>
<jr:detailCell style="Table_TD" height="30"/>
</jr:column>
</jr:table>
</componentElement>
<textField>
<reportElement x="20" y="80" width="100" height="30" uuid="b89cd04c-2569-43ef-9730-445b874855dd"/>
<textFieldExpression><![CDATA[$F{KN_FormelGG}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="20" y="32" width="100" height="30" uuid="e91b4461-5e53-4f85-8992-14e69a1aa05f"/>
<text><![CDATA[KN_FormelGG]]></text>
</staticText>
</band>
</detail>
<columnFooter>
<band height="45" splitType="Stretch"/>
</columnFooter>
<pageFooter>
<band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
<band height="42" splitType="Stretch"/>
</summary>
</jasperReport>

My goal is to get a field value from the main report and manipulate
its value, then fill the beans with these values and at last fill the
table with the beans.
I will ignore all your scriplets and other code and show you the simplest way to create a dynamic datasource for another component using a current field, variable or parameter value.
As example we will have these String values in field1 (row1, row2)
Test1_1.23:Test2_4.32:Test3_1.08
Test1_2.12:Test2_5.12:Test3_2.13
We want to split on : and create rows (List of beans), then split on _ to create columns (properties on bean) and display this in a jr:table component.
java code (or Bean)
public class TableCellsBean {
private String name;
private double value;
public TableCellsBean(String name,double value){
this.name = name;
this.value = value;
}
public static JRBeanCollectionDataSource getDatasource(String fieldValue){
List<TableCellsBean> retList = new ArrayList<>();
String[] values = fieldValue.split(":");
for (String v : values) {
String[] sp = v.split("_");
retList.add(new TableCellsBean(sp[0], Double.parseDouble(sp[1])));
}
return new JRBeanCollectionDataSource(retList);
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getValue() {
return value;
}
public void setValue(double value) {
this.value = value;
}
}
As you can see already inside this bean class I have added a static method that returns a JRBeanCollectionDataSource depending on value passed as parameter.
Basically you pass a fieldValue to this method, it does some logic, creates the TableCellBean, adds them to list and return a JRBeanCollectionDataSource
Note: The method does not need to be static nor inside this class, furthermore exception handling is not considered.
Report - the jrxml
In example we will have field1 containing Test1_1.23:Test2_4.32:Test3_1.08 on row 1 and Test1_2.12:Test2_5.12:Test3_2.13 on row 2.
We define a subdataset that represents out TableCellsBean
<subDataset name="table_dataset" uuid="4dc1b0fb-2588-4f98-8c8d-f0afefbb2fd1">
<field name="name" class="java.lang.String"/>
<field name="value" class="java.lang.Double"/>
</subDataset>
as datasource we call our static method passing the field1 content in current row.
<dataSourceExpression><![CDATA[my.package.TableCellsBean.getDatasource($F{field1})]]></dataSourceExpression>
Full jrxml
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport xmlns="http://jasperreports.sourceforge.net/jasperreports" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports http://jasperreports.sourceforge.net/xsd/jasperreport.xsd" name="test" language="java" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="886a547e-11bd-434b-a330-d93ee5e4a280">
<style name="table">
<box>
<pen lineWidth="1.0" lineColor="#000000"/>
</box>
</style>
<style name="table_TH" mode="Opaque" backcolor="#F0F8FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table_CH" mode="Opaque" backcolor="#BFE1FF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<style name="table_TD" mode="Opaque" backcolor="#FFFFFF">
<box>
<pen lineWidth="0.5" lineColor="#000000"/>
</box>
</style>
<subDataset name="table_dataset" uuid="4dc1b0fb-2588-4f98-8c8d-f0afefbb2fd1">
<field name="name" class="java.lang.String"/>
<field name="value" class="java.lang.Double"/>
</subDataset>
<field name="field1" class="java.lang.String">
<fieldDescription><![CDATA[_THIS]]></fieldDescription>
</field>
<detail>
<band height="40" splitType="Stretch">
<textField>
<reportElement x="0" y="0" width="555" height="20" uuid="a73343b1-ccb2-4a59-b882-381b98efd664"/>
<textElement verticalAlignment="Middle"/>
<textFieldExpression><![CDATA[$F{field1}]]></textFieldExpression>
</textField>
<componentElement>
<reportElement key="table" style="table" x="0" y="20" width="555" height="20" uuid="09a9a5b8-499b-40d2-b391-ece25772a31e"/>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components" xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="table_dataset" uuid="05601bdb-5579-4253-90f7-6742739d9714">
<dataSourceExpression><![CDATA[bounty.TableCellsBean.getDatasource($F{field1})]]></dataSourceExpression>
</datasetRun>
<jr:column width="90" uuid="afbbb3d0-573a-495d-ab51-0ae4d601e6fb">
<jr:tableHeader style="table_TH" height="20" rowSpan="1">
<staticText>
<reportElement x="0" y="0" width="90" height="20" uuid="e476f026-bbec-4b19-9bd4-f4b21f3377ef"/>
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[Name]]></text>
</staticText>
</jr:tableHeader>
<jr:detailCell style="table_TD" height="20" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="90" height="20" uuid="49cac181-b16b-4ab3-b600-78a56fb0f42b"/>
<box leftPadding="3" rightPadding="3"/>
<textElement verticalAlignment="Middle"/>
<textFieldExpression><![CDATA[$F{name}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="90" uuid="4a1b0759-c347-4294-82c5-3aed4762f0c4">
<jr:tableHeader style="table_TH" height="20" rowSpan="1">
<staticText>
<reportElement x="0" y="0" width="90" height="20" uuid="bfa965b5-b5a4-484d-bfbd-d8bc753718b1"/>
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<text><![CDATA[Value]]></text>
</staticText>
</jr:tableHeader>
<jr:detailCell style="table_TD" height="20" rowSpan="1">
<textField>
<reportElement x="0" y="0" width="90" height="20" uuid="925192bc-a761-48f5-bad5-097d15587198"/>
<box leftPadding="3" rightPadding="3"/>
<textElement textAlignment="Right" verticalAlignment="Middle"/>
<textFieldExpression><![CDATA[$F{value}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
</jasperReport>
Test the example
Adding main method to export to pdf
public static void main(String[] args) throws JRException {
//Compile report
JasperReport report = JasperCompileManager.compileReport("myJasperReport.jrxml");
//Setting up some arbitrary data to test the auto creation of datasource
List<String> someData = new ArrayList<>();
someData.add("Test1_1.23:Test2_4.32:Test3_1.08");
someData.add("Test1_2.12:Test2_5.12:Test3_2.13");
//Fill report
JasperPrint jasperPrint = JasperFillManager.fillReport(report, new HashMap<>(),new JRBeanCollectionDataSource(someData));
//Export to pdf
JRPdfExporter exporter = new JRPdfExporter();
exporter.setExporterInput(new SimpleExporterInput(jasperPrint));
exporter.setExporterOutput(new SimpleOutputStreamExporterOutput("myJasperReport.pdf"));
SimplePdfExporterConfiguration configuration = new SimplePdfExporterConfiguration();
exporter.setConfiguration(configuration);
exporter.exportReport();
}
Output
Conclusion
The simplest way to provide components with custom datasource depending on running reports values (fields, variables, parameter), is to create a method that generates the datasource and call this in dataSourceExpression

.jrxml to .jasper compile error field not found exception

Hi i'm new to jasper report.i'm using ireport for designing report.
I have created a simple report design, which have 2 fields name,addr.
public class R {
private String name;
private String addr;
public R(String name, String addr) {
super();
this.name = name;
this.addr = addr;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddr() {
return addr;
}
public void setAddr(String addr) {
this.addr = addr;
}
}
.jrxml file
<?xml version="1.0" encoding="UTF-8"?>
<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="R" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="4fd2f78e-344d-4371-ba1e-f86c2a81ef75">
<property name="ireport.zoom" value="1.0"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="79" splitType="Stretch"/>
</title>
<pageHeader>
<band height="35" splitType="Stretch"/>
</pageHeader>
<columnHeader>
<band height="61" splitType="Stretch">
<staticText>
<reportElement x="296" y="41" width="228" height="20" uuid="19aa39a0-45cf-4b36-b327-25b640f81d8a"/>
<textElement textAlignment="Center"/>
<text><![CDATA[Address]]></text>
</staticText>
<staticText>
<reportElement x="36" y="41" width="215" height="20" uuid="baba8372-2215-439d-8b20-fd4ab054bbe5"/>
<textElement textAlignment="Center"/>
<text><![CDATA[Name]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="125" splitType="Stretch">
<textField>
<reportElement x="296" y="0" width="228" height="20" uuid="c4de17e6-e5bc-4454-b38e-cc50acf18f0b"/>
<textFieldExpression><![CDATA[$F{addr}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="36" y="0" width="215" height="20" uuid="8283d8b6-a288-48ec-bd4a-36c2875f5cff"/>
<textFieldExpression><![CDATA[$F{name}]]></textFieldExpression>
</textField>
</band>
</detail>
<columnFooter>
<band height="45" splitType="Stretch"/>
</columnFooter>
<pageFooter>
<band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
<band height="42" splitType="Stretch"/>
</summary>
</jasperReport>
Here i'm using array list as a data source.
When i click compile button on i report it shows error that
net.sf.jasperreports.engine.design.JRValidationException: Report design not valid :       1. Field not found : addr      2. Field not found : name
java code
public void runReport(String fileName, String outFileName) throws JRException
{
List<R> list = new ArrayList<R>();
Map parameters = new HashMap();
list.add(new R("a1" ,"a2"));
list.add(new R("b1" ,"b2"));
list.add(new R("c1" ,"c2"));
JasperPrint print = JasperFillManager.fillReport( fileName, parameters, new JRBeanCollectionDataSource(list));
JRExporter exporter = new JRPdfExporter();
exporter.setParameter(
JRExporterParameter.OUTPUT_FILE_NAME,outFileName);
exporter.setParameter(
JRExporterParameter.JASPER_PRINT, print);
JasperExportManager.exportReportToPdfFile(print, outFileName);
print = null;
exporter = null;
}

You should add to your jrxml field:
<field name="addr" class="java.lang.String">
<fieldDescription><![CDATA[addr]]></fieldDescription></field>
You can do it by clicking on "fields" and selecting "create field".

Getting null values in report when using JavaBean Data Source

When I tried to generate a report by using JavaBean Data Source and displaying the bean's field values in the table, the PDF report is showing null values.
I have a simple bean (PersonBean) as follows:
public class PersonBean {
private String Field1;
private String Field2;
public String getField1() {
return Field1;
}
public void setField1(String field1) {
Field1 = field1;
}
public String getField2() {
return Field2;
}
public void setField2(String field2) {
Field2 = field2;
}
}
The Person class which populate and return the collection of bean is as follows:
import java.util.ArrayList;
import java.util.List;
public class Person {
public static java.util.List<PersonBean> getReportData() throws Exception {
List<PersonBean> personBeanList = null;
try {
personBeanList = new ArrayList<PersonBean>();
PersonBean personBean1 = new PersonBean();
personBean1.setField1("Hina");
personBean1.setField2("Sachdev");
personBeanList.add(personBean1);
PersonBean personBean2 = new PersonBean();
personBean2.setField1("Swathi");
personBean2.setField2("Singh");
personBeanList.add(personBean2);
} catch (Exception e) {
e.printStackTrace();
}
return personBeanList;
}
}
The PersonReport class which creates report is as follows:
import java.io.FileNotFoundException;
import java.util.*;
import net.sf.jasperreports.engine.*;
import net.sf.jasperreports.engine.data.JRBeanCollectionDataSource;
import net.sf.jasperreports.engine.design.JasperDesign;
import net.sf.jasperreports.engine.xml.JRXmlLoader;
import net.sf.jasperreports.view.JasperViewer;
public class PersonReport implements JRDataSource {
public static void main(String[] args) throws JRException, FileNotFoundException {
try {
Map<String, Object> params = new HashMap<String, Object>();
JasperDesign jasperDesign = JRXmlLoader.load("C:/Users/sachdevh/Desktop/reports/personReport.jrxml");
JasperReport jasperReport = JasperCompileManager.compileReport(jasperDesign);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, params,
new JRBeanCollectionDataSource(Person.getReportData()));
JasperExportManager.exportReportToPdfFile(jasperPrint, "./Util/bean.pdf");
JasperViewer.viewReport(jasperPrint);
} catch (Exception e) {
e.printStackTrace();
}
}
#Override
public Object getFieldValue(JRField arg0) throws JRException {
return null;
}
#Override
public boolean next() throws JRException {
return false;
}
}
By using iReport 4.6.0, I designed a report by inserting table component.
The jrxml file is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<jasperReport ..>
<subDataset name="New Dataset 1" uuid="50bff6d9-9b98-444b-9851-bdd37ea570e4">
<queryString><![CDATA[]]></queryString>
<field name="field1" class="java.lang.String">
<fieldDescription><![CDATA[field1]]></fieldDescription>
</field>
<field name="field2" class="java.lang.String">
<fieldDescription><![CDATA[field2]]></fieldDescription>
</field>
</subDataset>
<parameter name="SUBREPORT_DIR" class="java.lang.String" isForPrompting="false">
<defaultValueExpression><![CDATA["C:\\Users\\sachdevh\\Desktop\\reports\\"]]></defaultValueExpression>
</parameter>
<parameter name="parameter1" class="java.lang.String">
<defaultValueExpression><![CDATA[$F{field1}]]></defaultValueExpression>
</parameter>
<queryString>
<![CDATA[]]>
</queryString>
<field name="field1" class="java.lang.String">
<fieldDescription><![CDATA[field1]]></fieldDescription>
</field>
<field name="field2" class="java.lang.String">
<fieldDescription><![CDATA[field2]]></fieldDescription>
</field>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="79" splitType="Stretch"/>
</title>
<pageHeader>
<band height="35" splitType="Stretch"/>
</pageHeader>
<columnHeader>
<band height="61" splitType="Stretch">
<componentElement>
<reportElement uuid="b3e3e08d-91d9-4e01-ae74-abdfc270551a" key="table" x="0" y="0" width="555"
height="61"/>
<jr:table xmlns:jr="http://jasperreports.sourceforge.net/jasperreports/components"
xsi:schemaLocation="http://jasperreports.sourceforge.net/jasperreports/components http://jasperreports.sourceforge.net/xsd/components.xsd">
<datasetRun subDataset="New Dataset 1" uuid="f5f39e4f-4349-4e5d-9736-03f84a7a7617">
<dataSourceExpression>
<![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource(Person.getReportData())]]></dataSourceExpression>
</datasetRun>
<jr:column uuid="9e2a6076-7f96-40c8-86ae-318b521a4f81" width="90">
<jr:tableHeader height="30"/>
<jr:tableFooter height="30"/>
<jr:columnHeader height="30">
<staticText>
<reportElement uuid="99411482-c1d5-44fa-aef7-9d9f4bf392ec" x="0" y="0" width="90"
height="30"/>
<textElement/>
<text><![CDATA[field1]]></text>
</staticText>
</jr:columnHeader>
<jr:columnFooter height="30"/>
<jr:detailCell height="20">
<textField>
<reportElement uuid="74861d9e-48a8-47ce-a477-81d4f497d483" x="0" y="0" width="90"
height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{field1}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column uuid="84c3b078-0114-452e-b3a3-f1c7dcd1b8cb" width="90">
<jr:tableHeader height="30"/>
<jr:tableFooter height="30"/>
<jr:columnHeader height="30">
<staticText>
<reportElement uuid="cb87f1a0-bbbf-40b2-bb19-292ecf8d9a18" x="0" y="0" width="90"
height="30"/>
<textElement/>
<text><![CDATA[field2]]></text>
</staticText>
</jr:columnHeader>
<jr:columnFooter height="30"/>
<jr:detailCell height="20">
<textField>
<reportElement uuid="84fd788f-24e8-4dfa-8c83-ce388c663f45" x="0" y="0" width="90"
height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{field2}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</columnHeader>
<detail>
<band height="125" splitType="Stretch"/>
</detail>
<columnFooter>
<band height="45" splitType="Stretch"/>
</columnFooter>
<pageFooter>
<band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
<band height="42" splitType="Stretch"/>
</summary>
</jasperReport>
I think the datasource expression below
<dataSourceExpression><![CDATA[new net.sf.jasperreports.engine.data.JRBeanCollectionDataSource(Person.getReportData())]]></dataSourceExpression>

You can solve this issue in two steps:
Move table component to the Title band (now it lies in Column Header band) - to prevent occurring of net.sf.jasperreports.engine.JRRuntimeException: Infinite loop creating new page due to column header overflow exception in cases when datasource has a lot of elements;
Change the table's subDataset dataSourceExpression to value below, that is relevant to your Java code:
<datasetRun subDataset="New Dataset 1" uuid="f5f39e4f-4349-4e5d-9736-03f84a7a7617">
<dataSourceExpression><![CDATA[$P{REPORT_DATA_SOURCE}]]></dataSourceExpression>
</datasetRun>