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.

report.xml

<?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.

report.gvy

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.

Author

My name is Jan Bodnar, and I am a passionate programmer with extensive programming experience. I have been writing programming articles since 2007. To date, I have authored over 1,400 articles and 8 e-books. I possess more than ten years of experience in teaching programming.

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