JaCoCo for Java code coverage: Utilities

Under projects/build/plugins, add the following XML:

<plugin>
    <groupId>org.jacoco</groupId>
    <artifactId>jacoco-maven-plugin</artifactId>
    <version>0.8.2</version>
    <executions>
        <execution>
            <goals>
                <goal>prepare-agent</goal>
            </goals>
        </execution>
        <execution>
            <id>report</id>
            <phase>prepare-package</phase>
            <goals>
                <goal>report</goal>
            </goals>
        </execution>
    </executions>
</plugin>

And under projects, add this XML:

<reporting>
    <plugins>
        <plugin>
            <groupId>org.jacoco</groupId>
            <artifactId>jacoco-maven-plugin</artifactId>
            <reportSets>
                <reportSet>
                    <reports>
                        <!-- select non-aggregate reports -->
                        <report>report</report>
                    </reports>
                </reportSet>
            </reportSets>
        </plugin>
    </plugins>
</reporting>

Now all you need to do is run the command mvn test jacoco:report
You can find this report in the target/site/jacoco directory in your project.

Refer Jacoco site https://www.eclemma.org/jacoco/ for more details.