JasperReports pie chart
last modified February 12, 2024
JasperReports pie chart tutorial shows how to create a pie chart in JasperReports library.
JasperReports is an open-source reporting library. It can create reports in various formats including PDF, HTML, XLS, or CSV.
Pie chart is a type of chart that displays data in a circle, divided into slices. The slices represent the proportions of the values to the total size.
JasperReports pie chart example
In the following example, we place a pie chart into a report; the chart shows various fruits and their quantities.
<?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="report" pageWidth="595" pageHeight="842" columnWidth="555"
leftMargin="20" rightMargin="20" topMargin="20" bottomMargin="20">
<field name="name"/>
<field name="quantity" class="java.lang.Integer"/>
<summary>
<band height="450" splitType="Stretch">
<pieChart>
<chart evaluationTime="Report">
<reportElement x="0" y="0" width="350" height="300"/>
<chartTitle position="Top">
<titleExpression><![CDATA["Fruits"]]></titleExpression>
</chartTitle>
<chartSubtitle/>
<chartLegend/>
</chart>
<pieDataset>
<dataset resetType="Report"/>
<keyExpression><![CDATA[$F{name}]]></keyExpression>
<valueExpression><![CDATA[$F{quantity}]]></valueExpression>
</pieDataset>
<piePlot labelFormat="{2}">
<plot/>
<itemLabel/>
</piePlot>
</pieChart>
</band>
</summary>
</jasperReport>
The pie chart uses the pieChart tag.
<field name="name"/> <field name="quantity" class="java.lang.Integer"/>
We have two fields mapped to the datasource: name and
quantity.
<chartTitle position="Top">
<titleExpression><![CDATA["Fruits"]]></titleExpression>
</chartTitle>
The title of the chart is set with chartTitle.
<piePlot labelFormat="{2}">
<plot/>
<itemLabel/>
</piePlot>
With the labelFormat attribute, we show the percentages in the
slices.
package com.zetcode
@Grab(group='net.sf.jasperreports', module='jasperreports', version='6.21.0')
@Grab(group='com.github.librepdf', module='openpdf', version='1.3.39')
import net.sf.jasperreports.engine.JasperCompileManager
import net.sf.jasperreports.engine.JasperExportManager
import net.sf.jasperreports.engine.JasperFillManager
import net.sf.jasperreports.engine.data.JRMapCollectionDataSource
def xmlFile = "report.xml"
def jrReport = JasperCompileManager.compileReport(xmlFile)
def fruits = [
[ "name": "Oranges", "quantity": 38],
[ "name": "Pears", "quantity": 45],
[ "name": "Plums", "quantity": 24],
[ "name": "Cherries", "quantity": 10],
]
def ds = new JRMapCollectionDataSource(fruits)
def params = [:]
def jrPrint = JasperFillManager.fillReport(jrReport, params, ds)
JasperExportManager.exportReportToPdfFile(jrPrint, "report.pdf")
This is the Groovy code to generate the report.
def fruits = [
[ "name": "Oranges", "quantity": 38],
[ "name": "Pears", "quantity": 45],
[ "name": "Plums", "quantity": 24],
[ "name": "Cherries", "quantity": 10],
]
This is the data displayed in the pie chart; it is a list of maps.
def ds = new JRMapCollectionDataSource(fruits)
We use the JRMapCollectionDataSource as the datasource.
def jPrint = JasperFillManager.fillReport(jrReport, params, ds)
The datasource is passed to the JasperFillManager.fillReport.
In this article we have created a pie chart with JasperReports library.