本文介绍了Jasper子报表在嵌入Title属性时仅显示JSON数据源中的一个条目的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我遇到了在主报表的标题区域中填充子报表中的数据的问题。数据在主报表的详细信息区域中的子报表中正确填充。我试图找到JSON查询中可能出错的地方。任何帮助表示赞赏。
I am having issues with populating data in subreport in the title band of the main report. The data is populated correctly in subreport in the detail band of the main report. I am trying to find what could be wrong in the JSON query. Any help is appreciated.
JSON示例数据源（expenses.json）
{
"expenses": {
"date": "8 Sep 2016",
"accounts": [
{
"title": "XYZ Corp (111)",
"accountName": "XYZ Corp",
"accountNumber": "111",
"transactions": [
{
"date": "21 Jun 2016",
"name": "gas",
"price": "17.50"
},
{
"date": "12 May 2016",
"name": "shopping",
"price": "111.99"
},
{
"date": "30 Apr 2016",
"name": "movies",
"price": "7.50"
}
]
},
{
"title": "ABC Corp (222)",
"accountName": "ABC Corp",
"accountNumber": "222",
"transactions": [
{
"date": "2 Jun 2016",
"name": "coffee",
"price": "3.25"
},
{
"date": "21 May 2016",
"name": "tea",
"price": "1.90"
},
{
"date": "20 Apr 2016",
"name": "juice",
"price": "4.50"
}
]
}
]
}
}
主报告（main.jrxml）
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.3.0.final using JasperReports Library version 6.3.0 -->
<!-- 2016-09-08T14:41:09 -->
<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="expenses_main" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="8cf0f1cb-ccad-41ba-aa8a-44abd597de54">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="expenses json data"/>
<queryString language="json">
<![CDATA[expenses.accounts]]>
</queryString>
<field name="title" class="java.lang.String">
<fieldDescription><![CDATA[title]]></fieldDescription>
</field>
<field name="date" class="java.lang.String">
<fieldDescription><![CDATA[expenses.date]]></fieldDescription>
</field>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="71" splitType="Stretch">
<staticText>
<reportElement x="2" y="0" width="201" height="16" uuid="2e947a01-8b6b-4169-beaa-6b2dac0d4141"/>
<text><![CDATA[Expense Report]]></text>
</staticText>
<subreport>
<reportElement x="2" y="44" width="550" height="22" uuid="1d364987-9047-4660-bd58-8a2bcfc8493d"/>
<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource()]]></dataSourceExpression>
<subreportExpression><![CDATA["/Users/arul/JaspersoftWorkspaceV2/reports/sub1.jasper"]]></subreportExpression>
</subreport>
<textField>
<reportElement x="442" y="0" width="100" height="16" uuid="1cfbe11b-4f85-4bad-9280-d8712b80a65c"/>
<textFieldExpression><![CDATA[$F{date}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="410" y="1" width="31" height="15" uuid="ee159651-5d7b-4e0e-a52a-cb71338891cc"/>
<text><![CDATA[Date: ]]></text>
</staticText>
</band>
</title>
<detail>
<band height="54" splitType="Stretch">
<textField>
<reportElement x="2" y="10" width="550" height="20" uuid="3b6e1d4b-2a58-4684-b334-396807db1169"/>
<textFieldExpression><![CDATA["Transactions for " + $F{title}]]></textFieldExpression>
</textField>
<subreport>
<reportElement x="2" y="30" width="545" height="20" uuid="10fde2aa-2b0b-4c1c-90d5-410f2fb9369b"/>
<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("transactions")]]></dataSourceExpression>
<subreportExpression><![CDATA["/Users/arul/JaspersoftWorkspaceV2/reports/sub2.jasper"]]></subreportExpression>
</subreport>
</band>
</detail>
</jasperReport>
Subreport1（sub1.jrxml）
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.3.0.final using JasperReports Library version 6.3.0 -->
<!-- 2016-09-08T14:43:35 -->
<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="expenses_summary" pageWidth="555" pageHeight="802" columnWidth="555" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="d8ef4ad1-3a01-4394-a78c-17f9d95f98de">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="expenses json data"/>
<queryString language="JSON">
<![CDATA[expenses.accounts]]>
</queryString>
<field name="accountName" class="java.lang.String">
<fieldDescription><![CDATA[accountName]]></fieldDescription>
</field>
<field name="accountNumber" class="java.lang.String">
<fieldDescription><![CDATA[accountNumber]]></fieldDescription>
</field>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="21">
<staticText>
<reportElement x="0" y="0" width="100" height="20" uuid="258b2395-7fd1-4df0-b000-e2bfd2620fab"/>
<textElement>
<font isBold="true"/>
</textElement>
<text><![CDATA[Account Summary]]></text>
</staticText>
</band>
</title>
<columnHeader>
<band height="21" splitType="Stretch">
<staticText>
<reportElement mode="Opaque" x="0" y="0" width="100" height="20" backcolor="#DBD7D7" uuid="b04ff630-de8e-4a9b-9ea0-d402d4734ae7"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<text><![CDATA[Account Name]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="100" y="0" width="100" height="20" backcolor="#DBD7D7" uuid="6f0d406e-8d99-4364-888c-38bc6c0fa8c6"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<text><![CDATA[Account Number]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="21" splitType="Stretch">
<textField>
<reportElement x="0" y="0" width="100" height="20" uuid="c140795a-02a5-4334-9c5f-dc50e8a8ff6f"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textFieldExpression><![CDATA[$F{accountName}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="100" y="0" width="100" height="20" uuid="ac7a5340-4c86-45d2-a932-b7b0e347a421"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textFieldExpression><![CDATA[$F{accountNumber}]]></textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>
Subreport2（sub2.jrxml）
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.3.0.final using JasperReports Library version 6.3.0 -->
<!-- 2016-09-08T14:43:55 -->
<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="expenses_subreport" pageWidth="555" pageHeight="802" columnWidth="555" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="2e39bfaf-e964-4b5d-847e-6517de5718d4">
<field name="date" class="java.lang.String"/>
<field name="name" class="java.lang.String"/>
<field name="price" class="java.lang.String"/>
<background>
<band splitType="Stretch"/>
</background>
<columnHeader>
<band height="20" splitType="Stretch">
<staticText>
<reportElement mode="Opaque" x="0" y="0" width="100" height="20" backcolor="#DBD7D7" uuid="8e073b78-91de-4819-886a-2527d5634067"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textElement>
<font isBold="true"/>
</textElement>
<text><![CDATA[Date]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="100" y="0" width="100" height="20" backcolor="#DBD7D7" uuid="e7e7d858-05eb-4fda-9ae6-d998b4a51fd8"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textElement>
<font isBold="true"/>
</textElement>
<text><![CDATA[Name]]></text>
</staticText>
<staticText>
<reportElement mode="Opaque" x="200" y="0" width="100" height="20" backcolor="#DBD7D7" uuid="fef220d6-4f85-4fd7-8017-5b64aff64666"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textElement>
<font isBold="true"/>
</textElement>
<text><![CDATA[Price]]></text>
</staticText>
</band>
</columnHeader>
<detail>
<band height="20" splitType="Stretch">
<textField>
<reportElement x="0" y="0" width="100" height="20" uuid="fd021427-d26c-4c9c-8c71-c9f136f11a66"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textFieldExpression><![CDATA[$F{date}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="100" y="0" width="100" height="20" uuid="b6cd9815-ba45-49dd-be46-60a6a835d3fd"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textFieldExpression><![CDATA[$F{name}]]></textFieldExpression>
</textField>
<textField>
<reportElement x="200" y="0" width="100" height="20" uuid="cf3e397e-5546-4490-a88c-7211f124475e"/>
<box>
<topPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<leftPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<bottomPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
<rightPen lineWidth="1.0" lineStyle="Solid" lineColor="#000000"/>
</box>
<textFieldExpression><![CDATA[$F{price}]]></textFieldExpression>
</textField>
</band>
</detail>
</jasperReport>
PDF是使用Jasper Reports 6.3.0 Java API生成的。
PDF is generating using Jasper Reports 6.3.0 Java API.
import net.sf.jasperreports.engine.JasperExportManager;
import net.sf.jasperreports.engine.JasperFillManager;
import net.sf.jasperreports.engine.JasperPrint;
import net.sf.jasperreports.engine.JasperReport;
import net.sf.jasperreports.engine.query.JsonQueryExecuterFactory;
import net.sf.jasperreports.engine.util.JRLoader;
import java.io.FileInputStream;
import java.util.HashMap;
import java.util.Map;
public class JasperTest {
public static void main(String[] args) throws Exception {
JasperReport jasperReport = (JasperReport) JRLoader.loadObjectFromFile("/Users/arul/JaspersoftWorkspaceV2/reports/main.jasper");
Map<String, Object> jasperParameters = new HashMap<String, Object>();
jasperParameters.put(JsonQueryExecuterFactory.JSON_INPUT_STREAM, new FileInputStream("/Users/arul/JaspersoftWorkspaceV2/data/expenses.json"));
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, jasperParameters);
JasperExportManager.exportReportToPdfFile(jasperPrint, "report.pdf");
}
}
推荐答案
您的将在您的初始json查询深入
Your are going to deep in your initial json query
<queryString language="json">
<![CDATA[expenses.accounts]]>
</queryString>
日期超出范围。
解决方案是保持开支范围
The solution is to stay on expenses scope
<queryString language="json">
<![CDATA[expenses]]>
</queryString>
子报告1（ sub1.jasper ）您现在将使用调用subDataSource（accounts） expression
The subreport 1 (sub1.jasper) you will now call with subDataSource("accounts") expression
<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("accounts")]]></dataSourceExpression>
但是你现在只有1个细节带记录（费用），要解决这个问题你可以介绍一下另一个子报告。
However you will now have only 1 detail band record (expenses), to solve this issue you can introduce another subreport.
而不是直接调用子报告2而是再次迭代引入子报告1_2（ sub1_2.jasper ）在帐户 subDataSource（accounts）上，这将显示标题并包含子报表2（ sub2.jasper ）使用事务上的数据源 .subDataSource（transactions）
Instead of directly calling sub report 2 introduce a subreport 1_2 (sub1_2.jasper) to iterate again on accounts subDataSource("accounts"), this will display the title and include your subreport 2 (sub2.jasper) with the datasource on transaction .subDataSource("transactions")
主报告（ main.jrxml ）
Main report (main.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="expenses_main" pageWidth="595" pageHeight="842" columnWidth="555" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="8cf0f1cb-ccad-41ba-aa8a-44abd597de54">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="Json"/>
<queryString language="json">
<![CDATA[expenses]]>
</queryString>
<field name="date" class="java.lang.String">
<fieldDescription><![CDATA[date]]></fieldDescription>
</field>
<background>
<band splitType="Stretch"/>
</background>
<title>
<band height="71" splitType="Stretch">
<staticText>
<reportElement x="2" y="0" width="201" height="16" uuid="2e947a01-8b6b-4169-beaa-6b2dac0d4141"/>
<text><![CDATA[Expense Report]]></text>
</staticText>
<subreport>
<reportElement x="2" y="44" width="550" height="22" uuid="1d364987-9047-4660-bd58-8a2bcfc8493d"/>
<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("accounts")]]></dataSourceExpression>
<subreportExpression><![CDATA["sub1.jasper"]]></subreportExpression>
</subreport>
<textField>
<reportElement x="442" y="0" width="100" height="16" uuid="1cfbe11b-4f85-4bad-9280-d8712b80a65c"/>
<textFieldExpression><![CDATA[$F{date}]]></textFieldExpression>
</textField>
<staticText>
<reportElement x="410" y="1" width="31" height="15" uuid="ee159651-5d7b-4e0e-a52a-cb71338891cc"/>
<text><![CDATA[Date: ]]></text>
</staticText>
</band>
</title>
<detail>
<band height="36" splitType="Stretch">
<subreport isUsingCache="false">
<reportElement x="2" y="10" width="545" height="20" uuid="10fde2aa-2b0b-4c1c-90d5-410f2fb9369b"/>
<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("accounts")]]></dataSourceExpression>
<subreportExpression><![CDATA["sub1_2.jasper"]]></subreportExpression>
</subreport>
</band>
</detail>
</jasperReport>
子报告1_2（ sub1_2.jasper ）
Sub report 1_2 (sub1_2.jasper)
<?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="expenses_subreport" pageWidth="555" pageHeight="802" columnWidth="555" leftMargin="0" rightMargin="0" topMargin="0" bottomMargin="0" uuid="2e39bfaf-e964-4b5d-847e-6517de5718d4">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="Json"/>
<field name="title" class="java.lang.String"/>
<background>
<band splitType="Stretch"/>
</background>
<detail>
<band height="40" splitType="Stretch">
<property name="com.jaspersoft.studio.unit.height" value="pixel"/>
<textField>
<reportElement x="2" y="1" width="550" height="20" uuid="934d546e-aeeb-4760-b100-cbefed73c420"/>
<textFieldExpression><![CDATA["Transactions for " + $F{title}]]></textFieldExpression>
</textField>
<subreport isUsingCache="false">
<reportElement x="5" y="16" width="545" height="20" uuid="1b8b0487-9dfa-4b82-bfb1-13009cb74ece"/>
<dataSourceExpression><![CDATA[((net.sf.jasperreports.engine.data.JsonDataSource)$P{REPORT_DATA_SOURCE}).subDataSource("transactions")]]></dataSourceExpression>
<subreportExpression><![CDATA["sub2.jasper"]]></subreportExpression>
</subreport>
</band>
</detail>
</jasperReport>
子报告1和2（ sub1.jrxml 和 sub2.jrxml ）
Sub report 1 and 2 (sub1.jrxml and sub2.jrxml)
无变化
结果
这篇关于Jasper子报表在嵌入Title属性时仅显示JSON数据源中的一个条目的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！