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JasperReports pie chart

last modified December 11, 2021

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='6.17.0')

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 tutorial, we have created a pie chart with JasperReports library. List all JasperReports tutorials.