Maven Jacoco Configuration - Exclude classes/packages from report not working - maven

Question

I have a maven multi-module project and I'm using jacoco-maven for code coverage reports. Some classes should not be reported, as they're Spring configuration and I'm not interested in them.
I have declared the maven-jacoco plugin as follow:
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.7.2.201409121644</version>
<configuration>
<outputDirectory>${project.reporting.outputDirectory}/jacoco-ut</outputDirectory>
<exclude>some.package.*</exclude>
<exclude>**/*Config.*</exclude>
<exclude>**/*Dev.*</exclude>
<exclude>some/package/SomeClass.java</exclude>
</configuration>
<executions>
<execution>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>report</id>
<phase>prepare-package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
<execution>
<id>post-unit-test</id>
<phase>test</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
The problem is that when I execute mvn clean verify jacoco still reports classes that should have been excluded as my xml configuration points out. How can I configure it properly?

Answer 1

Your XML is slightly wrong, you need to add any class exclusions within an excludes parent field, so your above configuration should look like the following as per the Jacoco docs
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.8</version>
<configuration>
<excludes>
<exclude>**/*Config.*</exclude>
<exclude>**/*Dev.*</exclude>
</excludes>
</configuration>
<executions>
<execution>
<id>jacoco-report</id>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
The values of the exclude fields should be class paths (not package names) of the compiled classes relative to the directory target/classes/ using the standard wildcard syntax
* Match zero or more characters
** Match zero or more directories
? Match a single character
You may also exclude a package and all of its children/subpackages this way:
<exclude>some/package/**/*</exclude>
This will exclude every class in some.package, as well as any children. For example, some.package.child wouldn't be included in the reports either.
I have tested and my report goal reports on a reduced number of classes using the above.
If you are then pushing this report into Sonar, you will then need to tell Sonar to exclude these classes in the display which can be done in the Sonar settings
Settings > General Settings > Exclusions > Code Coverage
Sonar Docs explains it a bit more
Running your command above
mvn clean verify
Will show the classes have been excluded
No exclusions
[INFO] --- jacoco-maven-plugin:0.7.4.201502262128:report (post-test) # ** ---
[INFO] Analyzed bundle '**' with 37 classes
With exclusions
[INFO] --- jacoco-maven-plugin:0.7.4.201502262128:report (post-test) # ** ---
[INFO] Analyzed bundle '**' with 34 classes

Answer 2

Though Andrew already answered question with details , i am giving code how to exclude it in pom
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.7.9</version>
<configuration>
<excludes>
<exclude>**/*com/test/vaquar/khan/HealthChecker.class</exclude>
</excludes>
</configuration>
<executions>
<!-- prepare agent for measuring integration tests -->
<execution>
<id>jacoco-initialize</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>jacoco-site</id>
<phase>package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
For Springboot application
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>sonar-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.sonarsource.scanner.maven</groupId>
<artifactId>sonar-maven-plugin</artifactId>
</plugin>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<configuration>
<excludes>
<!-- Exclude class from test coverage -->
<exclude>**/*com/khan/vaquar/Application.class</exclude>
<!-- Exclude full package from test coverage -->
<exclude>**/*com/khan/vaquar/config/**</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>

Answer 3

Another solution:
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.7.5.201505241946</version>
<executions>
<execution>
<id>default-prepare-agent</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>default-report</id>
<phase>prepare-package</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
<execution>
<id>default-check</id>
<goals>
<goal>check</goal>
</goals>
<configuration>
<rules>
<rule implementation="org.jacoco.maven.RuleConfiguration">
<excludes>
<exclude>com.mypackage1</exclude
<exclude>com.mypackage2</exclude>
</excludes>
<element>PACKAGE</element>
<limits>
<limit implementation="org.jacoco.report.check.Limit">
<counter>COMPLEXITY</counter>
<value>COVEREDRATIO</value>
<minimum>0.85</minimum>
</limit>
</limits>
</rule>
</rules>
</configuration>
</execution>
</executions>
</plugin>
Please note that, we are using "<element>PACKAGE</element>" in the configuration which then helps us to exclude at package level.

Answer 4

you can configure the coverage exclusion in the sonar properties, outside of the configuration of the jacoco plugin:
...
<properties>
....
<sonar.exclusions>
**/generated/**/*,
**/model/**/*
</sonar.exclusions>
<sonar.test.exclusions>
src/test/**/*
</sonar.test.exclusions>
....
<sonar.java.coveragePlugin>jacoco</sonar.java.coveragePlugin>
<sonar.jacoco.reportPath>${project.basedir}/../target/jacoco.exec</sonar.jacoco.reportPath>
<sonar.coverage.exclusions>
**/generated/**/*,
**/model/**/*
</sonar.coverage.exclusions>
<jacoco.version>0.7.5.201505241946</jacoco.version>
....
</properties>
....
and remember to remove the exclusion settings from the plugin

Answer 5

Some Examples from the SonarQube Docs:

Answer 6

Use sonar.coverage.exclusions property.
mvn clean install -Dsonar.coverage.exclusions=**/*ToBeExcluded.java
This should exclude the classes from coverage calculation.

Answer 7

This Work Like a charm with Spring Boot 2.5.3 and Jacoco 0.8.4 ^_^
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.4</version>
<configuration>
<destFile>${basedir}/target/coverage-reports/jacoco-unit.exec</destFile>
<dataFile>${basedir}/target/coverage-reports/jacoco-unit.exec</dataFile>
<output>file</output>
<append>true</append>
<excludes>
<exclude>**/*com/example/Application.class</exclude>
<exclude>**/*com/example/modal*/**</exclude>
<exclude>**/*com/example/dto*/**</exclude>
<exclude>**/*com/example/mapper*/**</exclude>
</excludes>
</configuration>
<executions>
<execution>
<id>default-prepare-agent</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>jacoco-report</id>
<phase>test</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>

Answer 8

https://github.com/jacoco/jacoco/issues/34
These are the different notations for classes we have:
VM Name: java/util/Map$Entry
Java Name: java.util.Map$Entry File
Name: java/util/Map$Entry.class
Agent Parameters, Ant tasks and Maven prepare-agent goal
includes: Java Name (VM Name also works)
excludes: Java Name (VM Name also works)
exclclassloader: Java Name
These specifications allow wildcards * and ?, where * wildcards any number of characters, even multiple nested folders.
Maven report goal
includes: File Name
excludes: File Name
These specs allow Ant Filespec like wildcards *, ** and ?, where * wildcards parts of a single path element only.

Answer 9

Here is the working sample in pom.xml file.
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>${jacoco.version}</version>
<executions>
<execution>
<id>prepare-agent</id>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>post-unit-test</id>
<phase>test</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
<execution>
<id>default-check</id>
<goals>
<goal>check</goal>
</goals>
</execution>
</executions>
<configuration>
<dataFile>target/jacoco.exec</dataFile>
<!-- Sets the output directory for the code coverage report. -->
<outputDirectory>target/jacoco-ut</outputDirectory>
<rules>
<rule implementation="org.jacoco.maven.RuleConfiguration">
<element>PACKAGE</element>
<limits>
<limit implementation="org.jacoco.report.check.Limit">
<counter>COMPLEXITY</counter>
<value>COVEREDRATIO</value>
<minimum>0.00</minimum>
</limit>
</limits>
</rule>
</rules>
<excludes>
<exclude>com/pfj/fleet/dao/model/**/*</exclude>
</excludes>
<systemPropertyVariables>
<jacoco-agent.destfile>target/jacoco.exec</jacoco-agent.destfile>
</systemPropertyVariables>
</configuration>
</plugin>