iReport：子报表（XPath XML数据源）不迭代记录
问题描述：
我有子报表，但只有每个子报表中的第一个项目会一遍又一遍地显示。iReport：子报表（XPath XML数据源）不迭代记录
So data formatted like this: Looks like this
A A
1 1
2 1
3 1
B B
4 4
5 4
6 4
C C
7 7
8 7
主报告模板：
<?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="Journey Report" language="groovy" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
<property name="ireport.zoom" value="1.4641000000000006"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<parameter name="SUBREPORT_DIR" class="java.lang.String" isForPrompting="false">
<defaultValueExpression><![CDATA["/home/stuart/"]]></defaultValueExpression>
</parameter>
<queryString language="xPath">
<![CDATA[/clsXMLJourneyReport/JourneyList/clsXMLJourney]]>
</queryString>
<field name="ID" class="java.lang.String">
<fieldDescription><![CDATA[ID]]></fieldDescription>
</field>
<field name="dateFrom" class="java.lang.String">
<fieldDescription><![CDATA[dateFrom]]></fieldDescription>
</field>
<field name="dateTo" class="java.lang.String">
<fieldDescription><![CDATA[dateTo]]></fieldDescription>
</field>
<field name="locFrom" class="java.lang.String">
<fieldDescription><![CDATA[locFrom]]></fieldDescription>
</field>
<field name="locTo" class="java.lang.String">
<fieldDescription><![CDATA[locTo]]></fieldDescription>
</field>
<field name="distance" class="java.lang.String">
<fieldDescription><![CDATA[distance]]></fieldDescription>
</field>
<field name="journeyTime" class="java.lang.String">
<fieldDescription><![CDATA[journeyTime]]></fieldDescription>
</field>
<field name="aveSpeed" class="java.lang.String">
<fieldDescription><![CDATA[aveSpeed]]></fieldDescription>
</field>
<field name="distanceCF" class="java.lang.String">
<fieldDescription><![CDATA[distanceCF]]></fieldDescription>
</field>
<field name="idleTime" class="java.lang.String">
<fieldDescription><![CDATA[idleTime]]></fieldDescription>
</field>
<field name="Title1" class="java.lang.String">
<fieldDescription><![CDATA[/clsXMLJourneyReport/Title1]]></fieldDescription>
</field>
<field name="Title2" class="java.lang.String">
<fieldDescription><![CDATA[/clsXMLJourneyReport/Title2]]></fieldDescription>
</field>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="79" splitType="Stretch">
<image scaleImage="FillFrame">
<reportElement x="0" y="0" width="555" height="79"/>
<imageExpression><![CDATA["/home/stuart/Documents/Logic Ethos/Images/reportBackground1.jpg"]]></imageExpression>
</image>
<textField>
<reportElement x="7" y="27" width="508" height="22"/>
<textElement>
<font size="18"/>
</textElement>
<textFieldExpression><![CDATA[$F{Title1}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="7" y="59" width="508" height="20"/>
<textElement/>
<textFieldExpression><![CDATA[$F{Title2}]]></textFieldExpression>
</textField>
</band>
</title>
<pageHeader>
<band height="25" splitType="Stretch">
<textField>
<reportElement x="435" y="5" width="80" height="20"/>
<textElement textAlignment="Right">
<font size="8"/>
</textElement>
<textFieldExpression><![CDATA["Page "+$V{PAGE_NUMBER}+" of"]]></textFieldExpression>
</textField>
<textField evaluationTime="Report">
<reportElement x="515" y="5" width="40" height="20"/>
<textElement>
<font size="8"/>
</textElement>
<textFieldExpression><![CDATA[" " + $V{PAGE_NUMBER}]]></textFieldExpression>
</textField>
</band>
</pageHeader>
<detail>
<band height="114" splitType="Stretch">
<rectangle radius="10">
<reportElement mode="Opaque" x="0" y="0" width="555" height="43" backcolor="#98E4FF"/>
</rectangle>
<textField>
<reportElement x="134" y="4" width="411" height="10"/>
<textElement>
<font fontName="SansSerif" size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{locFrom}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="134" y="17" width="411" height="11"/>
<textElement>
<font fontName="SansSerif" size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{locTo}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="34" y="4" width="100" height="10"/>
<textElement>
<font fontName="SansSerif" size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{dateFrom}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="34" y="17" width="100" height="11"/>
<textElement>
<font fontName="SansSerif" size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{dateTo}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="7" y="4" width="26" height="10"/>
<textElement>
<font fontName="SansSerif" size="8"/>
</textElement>
<text><![CDATA[From:]]></text>
</staticText>
<staticText>
<reportElement x="7" y="17" width="26" height="11"/>
<textElement>
<font fontName="SansSerif" size="8"/>
</textElement>
<text><![CDATA[To:]]></text>
</staticText>
<subreport>
<reportElement x="7" y="44" width="538" height="69"/>
<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JRXmlDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("//XMLJourneyItem")]]></dataSourceExpression>
<subreportExpression><![CDATA[$P{SUBREPORT_DIR} + "Journey Report_GPS.jasper"]]></subreportExpression>
</subreport>
<textField>
<reportElement x="488" y="31" width="70" height="15"/>
<textElement>
<font size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{distance}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="443" y="31" width="42" height="15"/>
<textElement>
<font size="8"/>
</textElement>
<text><![CDATA[odometer:]]></text>
</staticText>
<textField>
<reportElement x="207" y="31" width="60" height="16"/>
<textElement>
<font size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{idleTime}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="184" y="31" width="23" height="15"/>
<textElement>
<font size="8"/>
</textElement>
<text><![CDATA[Idle:]]></text>
</staticText>
<textField>
<reportElement x="414" y="31" width="29" height="20"/>
<textElement>
<font size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{distanceCF}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="379" y="31" width="46" height="20"/>
<textElement>
<font size="8"/>
</textElement>
<text><![CDATA[crow-fly:]]></text>
</staticText>
<textField>
<reportElement x="97" y="31" width="100" height="16"/>
<textElement>
<font size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{journeyTime}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="35" y="31" width="62" height="16"/>
<textElement>
<font size="8"/>
</textElement>
<text><![CDATA[Journey Time:]]></text>
</staticText>
<textField>
<reportElement x="325" y="31" width="38" height="20"/>
<textElement>
<font size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{aveSpeed}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="276" y="31" width="54" height="12"/>
<textElement>
<font size="8"/>
</textElement>
<text><![CDATA[Ave Speed:]]></text>
</staticText>
</band>
</detail>
<pageFooter>
<band height="54" splitType="Stretch"/>
</pageFooter>
<summary>
<band height="42" splitType="Stretch"/>
</summary>
</jasperReport>
的报表模板：
<?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="Journey Report_GPS" language="groovy" pageWidth="555" pageHeight="802" columnWidth="555" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0">
<property name="ireport.zoom" value="1.3310000000000004"/>
<property name="ireport.x" value="0"/>
<property name="ireport.y" value="0"/>
<queryString language="xPath">
<![CDATA[/clsXMLJourneyReport/JourneyList/clsXMLJourney/JourneyItems/XMLJourneyItem]]>
</queryString>
<field name="date" class="java.lang.String">
<fieldDescription><![CDATA[/clsXMLJourney/JourneyItems/XMLJourneyItem/date]]></fieldDescription>
</field>
<field name="status" class="java.lang.String">
<fieldDescription><![CDATA[/clsXMLJourney/JourneyItems/XMLJourneyItem/status]]></fieldDescription>
</field>
<field name="odo" class="java.lang.String">
<fieldDescription><![CDATA[/clsXMLJourney/JourneyItems/XMLJourneyItem/odo]]></fieldDescription>
</field>
<field name="loc" class="java.lang.String">
<fieldDescription><![CDATA[/clsXMLJourney/JourneyItems/XMLJourneyItem/loc]]></fieldDescription>
</field>
<background>
<band splitType="Stretch"/>
</background>
<columnHeader>
<band height="28" splitType="Stretch">
<staticText>
<reportElement x="2" y="15" width="100" height="12"/>
<textElement>
<font fontName="Ubuntu" size="8"/>
</textElement>
<text><![CDATA[Time]]></text>
</staticText>
<staticText>
<reportElement x="102" y="15" width="100" height="12"/>
<textElement>
<font fontName="Ubuntu" size="8"/>
</textElement>
<text><![CDATA[Location]]></text>
</staticText>
<staticText>
<reportElement x="376" y="16" width="100" height="12"/>
<textElement>
<font fontName="Ubuntu" size="8"/>
</textElement>
<text><![CDATA[Status]]></text>
</staticText>
<staticText>
<reportElement x="476" y="16" width="100" height="12"/>
<textElement>
<font fontName="Ubuntu" size="8"/>
</textElement>
<text><![CDATA[Odometer]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="16" splitType="Stretch">
<textField>
<reportElement x="2" y="4" width="100" height="12"/>
<textElement>
<font fontName="Ubuntu" size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{date}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="102" y="4" width="274" height="12"/>
<textElement>
<font fontName="Ubuntu" size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{loc}]]></textFieldExpression>
</textField>
<textField isBlankWhenNull="true">
<reportElement x="376" y="4" width="100" height="12"/>
<textElement>
<font fontName="Ubuntu" size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{status}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="476" y="4" width="100" height="12"/>
<textElement>
<font fontName="Ubuntu" size="8"/>
</textElement>
<textFieldExpression><![CDATA[$F{odo}]]></textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>
答
如果输入的XML数据是这样的：
<?xml version="1.0" encoding="UTF-8"?>
<clsXMLJourneyReport>
<Title1>Title</Title1>
<Title2>Long title</Title2>
<JourneyList>
<clsXMLJourney>
<ID>100</ID>
<dateFrom>20.10.2010</dateFrom>
<dateTo>20.12.2010</dateTo>
<locFrom>21.11.2010</locFrom>
<locTo>29.11.2010</locTo>
<distance>122</distance>
<journeyTime>27.11.2010</journeyTime>
<aveSpeed>350</aveSpeed>
<distanceCF>110</distanceCF>
<idleTime>20.03.2011</idleTime>
<JourneyItems>
<XMLJourneyItem>
<date>21.03.2011</date>
<status>NEW</status>
<odo>odo1</odo>
<loc>loc1</loc>
</XMLJourneyItem>
<XMLJourneyItem>
<date>22.03.2011</date>
<status>NEW</status>
<odo>odo2</odo>
<loc>loc2</loc>
</XMLJourneyItem>
<XMLJourneyItem>
<date>23.03.2011</date>
<status>COORD</status>
<odo>odo3</odo>
<loc>loc3</loc>
</XMLJourneyItem>
</JourneyItems>
</clsXMLJourney>
<clsXMLJourney>
<ID>200</ID>
<dateFrom>18.09.2010</dateFrom>
<dateTo>25.09.2010</dateTo>
<locFrom>15.09.2010</locFrom>
<locTo>17.09.2010</locTo>
<distance>300</distance>
<journeyTime>10.09.2010</journeyTime>
<aveSpeed>330</aveSpeed>
<distanceCF>120</distanceCF>
<idleTime>25.03.2011</idleTime>
<JourneyItems>
<XMLJourneyItem>
<date>25.03.2011</date>
<status>NEW</status>
<odo>odo2_1</odo>
<loc>loc2_1</loc>
</XMLJourneyItem>
<XMLJourneyItem>
<date>25.03.2011</date>
<status>SIGN</status>
<odo>odo2_2</odo>
<loc>loc2_2</loc>
</XMLJourneyItem>
</JourneyItems>
</clsXMLJourney>
</JourneyList>
</clsXMLJourneyReport>
你可以让这个编辑在您的报表：
<queryString language="xPath">
<![CDATA[*]]>
</queryString>
<field name="date" class="java.lang.String">
<fieldDescription><![CDATA[date]]></fieldDescription>
</field>
<field name="status" class="java.lang.String">
<fieldDescription><![CDATA[status]]></fieldDescription>
</field>
<field name="odo" class="java.lang.String">
<fieldDescription><![CDATA[odo]]></fieldDescription>
</field>
<field name="loc" class="java.lang.String">
<fieldDescription><![CDATA[loc]]></fieldDescription>
</field>
结果将是：
哇，谢谢。但我仍然有问题。子报告中的输出是一行空值。我已经检查并确认我做出了正确的更改。我正在使用iReport 4.1.3 – FlappySocks
你能发布你的datasource xml文件的片段吗？我会检查它 –
我试着用你的xml数据，它是一样的。 – FlappySocks