使用 Java 数据源的带有饼图的 Jasper 报告创建为空白
[英]Jasper report with pie chart using Datasource from java is created blank
问题描述
I am using Jasper Report with Pie charts and push the data using java code.
我正在使用带有饼图的 Jasper Report 并使用 java 代码推送数据。 Here is my java code这是我的java代码
data1, data2, data3 are the objects of Data.java have some fields and its value. data1、data2、data3是Data.java的对象，有一些字段和值。
ArrayList<Data> selectedDataList = new ArrayList<Data>();
selectedDataList.add(data1);
selectedDataList.add(data2);
selectedDataList.add(data3);
URL in = CampaignReport.class.getResource("Report.jrxml");
// Compile jrxml file.
JasperReport jasperReport = JasperCompileManager.compileReport(in.getPath());
//Parameters for report
Map<String, Object> parameters = new HashMap<String, Object>();
// DataSource
// This is simple example, no database.
// then using empty datasource.
JRDataSource dataSource = new JREmptyDataSource();
JRBeanCollectionDataSource beanColDataSource = new JRBeanCollectionDataSource(selectedDataList);
parameters.put("ItemDataSource", beanColDataSource);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, beanColDataSource);
// Make sure the output directory exists.
File outDir = new File(folderUrl);
outDir.mkdirs();
JasperExportManager.exportReportToPdfFile(jasperPrint, fileName);
Here is the code of Report.jrxml这是 Report.jrxml 的代码
<?xml version="1.0" encoding="UTF-8"?>
<!-- Created with Jaspersoft Studio version 6.3.1.final using JasperReports Library version 6.3.1 -->
<!-- 2017-01-30T17:53:54 -->
<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="template_Table" pageWidth="842" pageHeight="595" orientation="Landscape" whenNoDataType="NoPages" columnWidth="802" leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20" uuid="1a0aa80b-dc07-4dca-bdbc-aa78eeb0d12b">
<property name="com.jaspersoft.studio.data.defaultdataadapter" value="One Empty Record"/>
<property name="com.jaspersoft.studio.unit." value="pixel"/>
<style name="Row" mode="Transparent" fontName="Calibri" pdfFontName="Times-Roman">
<conditionalStyle>
<conditionExpression><![CDATA[$V{REPORT_COUNT}%2 == 0]]></conditionExpression>
<style mode="Opaque" backcolor="#F0EFEF"/>
</conditionalStyle>
</style>
<style name="Table 1_TH" mode="Opaque" backcolor="#D0EBF7">
<box>
<pen lineWidth="0.5" lineColor="#FFFFFF"/>
<topPen lineWidth="0.5" lineColor="#FFFFFF"/>
<leftPen lineWidth="0.5" lineColor="#FFFFFF"/>
<bottomPen lineWidth="0.5" lineColor="#FFFFFF"/>
<rightPen lineWidth="0.5" lineColor="#FFFFFF"/>
</box>
</style>
<style name="Table 1_CH" mode="Opaque" backcolor="#FAFCFE">
<box>
<pen lineWidth="0.5" lineColor="#FFFFFF"/>
<topPen lineWidth="0.5" lineColor="#FFFFFF"/>
<leftPen lineWidth="0.5" lineColor="#FFFFFF"/>
<bottomPen lineWidth="0.5" lineColor="#FFFFFF"/>
<rightPen lineWidth="0.5" lineColor="#FFFFFF"/>
</box>
</style>
<style name="Table 1_TD" mode="Opaque" backcolor="#FAFCFE">
<box>
<pen lineWidth="0.5" lineColor="#FFFFFF"/>
<topPen lineWidth="0.5" lineColor="#FFFFFF"/>
<leftPen lineWidth="0.5" lineColor="#FFFFFF"/>
<bottomPen lineWidth="0.5" lineColor="#FFFFFF"/>
<rightPen lineWidth="0.5" lineColor="#FFFFFF"/>
</box>
<conditionalStyle>
<conditionExpression><![CDATA[new Boolean($V{REPORT_COUNT}.intValue()%2==0)]]></conditionExpression>
<style backcolor="#D5E3E2"/>
</conditionalStyle>
</style>
<subDataset name="Dataset1" uuid="7a7c32a6-b47a-4839-afad-3aeaed61363e">
<queryString>
<![CDATA[]]>
</queryString>
<field name="subject" class="java.lang.String"/>
<field name="marks" class="java.lang.Integer"/>
</subDataset>
<parameter name="ItemDataSource" class="net.sf.jasperreports.engine.data.JRBeanCollectionDataSource"/>
<field name="subject" class="java.lang.String"/>
<field name="marks" class="java.lang.Integer"/>
<group name="Group1">
<groupExpression><![CDATA[(int)($V{REPORT_COUNT}/15)]]></groupExpression>
</group>
<group name="Group2">
<groupExpression><![CDATA[(int)($V{REPORT_COUNT}/5)]]></groupExpression>
</group>
<pageHeader>
<band splitType="Stretch"/>
</pageHeader>
<detail>
<band height="120" splitType="Stretch">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.FreeLayout"/>
<componentElement>
<reportElement stretchType="RelativeToTallestObject" mode="Transparent" x="0" y="0" width="800" height="120" forecolor="#FFFFFF" backcolor="#424242" uuid="7786bb05-503a-4b6a-991a-a7bcf3abad07">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.grid.JSSGridBagLayout"/>
<property name="com.jaspersoft.studio.table.style.table_header" value="Table 1_TH"/>
<property name="com.jaspersoft.studio.table.style.column_header" value="Table 1_CH"/>
<property name="com.jaspersoft.studio.table.style.detail" value="Table 1_TD"/>
<property name="net.sf.jasperreports.export.headertoolbar.table.name" value=""/>
<property name="com.jaspersoft.studio.components.autoresize.proportional" value="true"/>
<property name="com.jaspersoft.studio.components.autoresize.next" 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">
<datasetRun subDataset="Dataset1" uuid="d3e1e03a-2c83-4436-9e50-79518bc3d337">
<dataSourceExpression><![CDATA[$P{ItemDataSource}]]></dataSourceExpression>
</datasetRun>
<jr:column width="52" uuid="dca8961f-ce2d-47ac-879c-b15847d170a9">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column1"/>
<property name="com.jaspersoft.studio.unit.height" value="pixel"/>
<property name="com.jaspersoft.studio.unit.width" value="pixel"/>
<jr:tableHeader style="Table 1_TH" height="70">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.unit.height" value="px"/>
<property name="com.jaspersoft.studio.unit.width" value="px"/>
<staticText>
<reportElement x="0" y="0" width="52" height="70" uuid="f60d1675-6fb6-4569-93ca-de32b3a8e861"/>
<box leftPadding="3"/>
<textElement textAlignment="Left" verticalAlignment="Middle" markup="html">
<font fontName="Verdana" size="9"/>
</textElement>
<text><![CDATA[Subject]]></text>
</staticText>
</jr:tableHeader>
<jr:detailCell style="Table 1_TD" height="50">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.unit.height" value="px"/>
<property name="com.jaspersoft.studio.unit.width" value="px"/>
<textField>
<reportElement x="0" y="0" width="52" height="50" uuid="f1de366a-b36f-4200-9b1e-7a0009be5373"/>
<box leftPadding="6"/>
<textElement textAlignment="Left" verticalAlignment="Middle">
<font fontName="Verdana"/>
</textElement>
<textFieldExpression><![CDATA[$F{subject}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
<jr:column width="53" uuid="dca8961f-ce2d-47ac-879c-b15847d170a9">
<property name="com.jaspersoft.studio.components.table.model.column.name" value="Column1"/>
<jr:tableHeader style="Table 1_TH" height="70">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.FreeLayout"/>
<property name="com.jaspersoft.studio.unit.height" value="px"/>
<property name="com.jaspersoft.studio.unit.width" value="px"/>
<staticText>
<reportElement x="0" y="0" width="53" height="70" uuid="f60d1675-6fb6-4569-93ca-de32b3a8e861"/>
<box leftPadding="3"/>
<textElement textAlignment="Left" verticalAlignment="Middle" markup="html">
<font fontName="Verdana" size="9"/>
</textElement>
<text><![CDATA[Marks]]></text>
</staticText>
</jr:tableHeader>
<jr:detailCell style="Table 1_TD" height="50">
<property name="com.jaspersoft.studio.layout" value="com.jaspersoft.studio.editor.layout.VerticalRowLayout"/>
<property name="com.jaspersoft.studio.unit.height" value="px"/>
<property name="com.jaspersoft.studio.unit.width" value="px"/>
<textField>
<reportElement x="0" y="0" width="53" height="50" uuid="f1de366a-b36f-4200-9b1e-7a0009be5373"/>
<textElement textAlignment="Center" verticalAlignment="Middle"/>
<textFieldExpression><![CDATA[$F{marks}]]></textFieldExpression>
</textField>
</jr:detailCell>
</jr:column>
</jr:table>
</componentElement>
</band>
</detail>
<summary>
<band height="440" splitType="Stretch">
<pieChart>
<chart evaluationTime="Report">
<reportElement x="10" y="40" width="270" height="300" uuid="08e2ac0f-0059-4037-b77e-521d78434987"/>
<chartTitle>
<titleExpression><![CDATA["My First JR Pie Chart"]]></titleExpression>
</chartTitle>
<chartSubtitle/>
<chartLegend/>
</chart>
<pieDataset>
<keyExpression><![CDATA[$F{subject}]]></keyExpression>
<valueExpression><![CDATA[$F{marks}]]></valueExpression>
</pieDataset>
<piePlot>
<plot/>
<itemLabel/>
</piePlot>
</pieChart>
</band>
</summary>
</jasperReport>
Using these code chart is created with data but report (table) is blank does not show data.使用这些代码图表是用数据创建的，但报告（表格）是空白的不显示数据。
What should I do ?我该怎么办 ？ Is something wrong in the code.是不是代码有问题。
1 个解决方案
解决方案1
1 已采纳
There is a problem of datasource, you are using same datasource for both the entity like table and chart.数据源存在问题，您对表和图表等实体使用相同的数据源。
So, create two different datasource.因此，创建两个不同的数据源。
JRBeanCollectionDataSource beanColDataSource = new JRBeanCollectionDataSource(selectedDataList);
parameters.put("ItemDataSource", beanColDataSource);
JRBeanCollectionDataSource chartColDataSource = new JRBeanCollectionDataSource(selectedDataList);
JasperPrint jasperPrint = JasperFillManager.fillReport(jasperReport, parameters, chartColDataSource);
This how you can pass the values to jrmxl.这是您将值传递给 jrmxl 的方式。 Now both have the data access properly ie chart and table.现在两者都可以正确访问数据，即图表和表格。
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