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There is no single Maven-wide setting for excluding files from static analysis. Configure the analyzer that runs in your project: PMD and Checkstyle accept plugin-specific <excludes> settings, while SpotBugs uses an XML filter to omit matching findings from reports. Find the plugin’s artifactId in your pom.xml before choosing a configuration.
Identify the analyzer before adding an exclusion
Look in the POM for the plugin that produces the report or build check. Common artifact IDs are maven-pmd-plugin, maven-checkstyle-plugin, and spotbugs-maven-plugin. Their exclusion settings do different things, so an <excludes> block copied from one plugin may not apply to another.
Also identify the goal or lifecycle that runs the analysis. A project may run a plugin during a build, when generating Maven Site reports, or in both places. The configuration must reach the execution that produces the output you want to change.
Exclude files from PMD
Put file patterns inside the PMD plugin’s <configuration>. This example omits one class and any file ending in Bean.java:
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<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-pmd-plugin</artifactId>
<version>3.28.0</version>
<configuration>
<excludes>
<exclude>com/example/LegacyAdapter.java</exclude>
<exclude>**/*Bean.java</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>PMD supports Ant-style wildcards, including **. Patterns are matched against paths relative to each source root, not the repository root. For example, use com/example/LegacyAdapter.java, not src/main/java/com/example/LegacyAdapter.java, when that file is under the standard Java source root. If a file matches both PMD’s <includes> and <excludes>, the exclusion takes precedence. See the PMD goal parameters.
To omit an entire source directory rather than particular files, use PMD’s <excludeRoots> setting. A file pattern is not the right substitute for excluding a whole source root; consult the PMD parameter reference for the configuration details.
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Exclude files from Checkstyle
Checkstyle’s Maven plugin also supports <excludes>. The plugin describes it as a filter for source-file names. Here is a plugin-specific example:
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<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-checkstyle-plugin</artifactId>
<version>3.6.0</version>
<configuration>
<excludes>
<exclude>**/LegacyAdapter.java</exclude>
<exclude>**/generated/**</exclude>
</excludes>
</configuration>
</plugin>
</plugins>
</build>Checkstyle’s plugin parameter documentation does not describe pattern matching as explicitly as PMD’s. Verify that a pattern behaves as intended with the Checkstyle plugin version and source roots configured in your project rather than assuming PMD’s path rules apply.
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Exclude recognized generated sources
If the files are generated sources and your Checkstyle plugin is version 3.3.1 or later, you can use <excludeGeneratedSources>true</excludeGeneratedSources>. It defaults to false. The option helps avoid maintaining a broad filename pattern, but the files must be recognized as generated sources in the Maven project. The setting and its version requirement are documented in the Checkstyle goal parameters.
Use a SpotBugs filter for findings
SpotBugs uses a different mechanism. Configure <excludeFilterFile> to point to an XML filter file; this filters matching bug instances from reports. It is not the same as telling PMD or Checkstyle to omit source files from their selection.
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For example, a SpotBugs Maven configuration can point to a filter file in the project:
<reporting>
<plugins>
<plugin>
<groupId>com.github.spotbugs</groupId>
<artifactId>spotbugs-maven-plugin</artifactId>
<version>4.10.4.1</version>
<configuration>
<excludeFilterFile>spotbugs-exclude.xml</excludeFilterFile>
</configuration>
</plugin>
</plugins>
</reporting>The filter file uses a FindBugsFilter root. A source-file match can look like this:
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<FindBugsFilter>
<Match>
<Source name="LegacyAdapter.java"/>
</Match>
</FindBugsFilter>Check the SpotBugs filter format against the actual bug instances. A filter can only match information present in those instances, and some findings involve multiple classes. The SpotBugs Maven usage guide documents <excludeFilterFile>.
Put configuration where the active execution can use it
For build-time analysis, configure the plugin under <build><plugins> or in a configuration inherited by the executing plugin. For Maven Site reports, configure the plugin under <reporting><plugins> as appropriate. If analysis runs in both contexts, check each execution: a setting in one configuration block does not automatically establish that the other report or goal uses it.
PMD’s exclusion example recommends <pluginManagement> when sharing configuration between build and reporting use. It centralizes plugin settings, but <pluginManagement> alone does not execute a plugin; the project still needs the plugin or goal to be used. See PMD’s exclusion example.
Check whether the file is excluded
- Run the same goal or lifecycle that normally produces the analysis. Do not rely on a different report or build execution to verify the change.
- Inspect that execution’s output or report. Confirm the target file no longer appears for PMD or Checkstyle, or that the intended findings are absent from SpotBugs output.
- If the result is unchanged, trace the configuration. Confirm the block is under the correct plugin, the tested goal uses it, and the file belongs to a source root the plugin analyzes.
- Recheck the pattern’s path convention. For PMD, use a source-root-relative path. For Checkstyle, verify the pattern against that plugin’s version and configured source roots. For SpotBugs, confirm the filter matches details present in the bug instances.
- Keep the pattern narrow. A broad pattern can remove handwritten code from coverage along with generated or legacy files.
File exclusion is not the same as suppressing violations
Choose the mechanism based on what you want to stop:
- Omit a file from PMD or Checkstyle selection: use the relevant plugin’s file exclusions; PMD also offers
<excludeRoots>for entire source roots. - Suppress particular Checkstyle violations: use Checkstyle’s
<suppressionsLocation>with a suppression XML file instead of removing the whole file from source selection. - Keep PMD analysis but prevent selected findings from failing the build: PMD’s
<excludeFromFailureFile>concerns classes and rules excluded from failures; it is distinct from<excludes>and<excludeRoots>, which control checked files or roots. - Stop the entire Checkstyle check:
<skip>skips the check.<failsOnError>controls whether violations fail the build. Neither setting excludes an individual file. - Filter SpotBugs output: use its XML filter for matching bug reports, not as a general per-file source-selection option.
Plugin-specific behavior is documented in the PMD goal reference, the Checkstyle goal reference, and the SpotBugs filter guide.
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