Java google checkstyle Maven

问题:

I'm trying to configure my Maven project to use google java check style with the following configuration:

google_checks.xml: https://github.com/checkstyle/checkstyle/blob/master/src/main/resources/google_checks.xml

pom.xml

<build>   <plugins>     <plugin>       <groupId>org.apache.maven.plugins</groupId>       <artifactId>maven-checkstyle-plugin</artifactId>       <version>2.17</version>       <executions>         <execution>           <id>checkstyle</id>           <phase>validate</phase>           <goals>             <goal>check</goal>           </goals>         </execution>       </executions>       <configuration>         <configLocation>google_checks.xml</configLocation>         <encoding>UTF-8</encoding>         <consoleOutput>true</consoleOutput>         <failsOnError>true</failsOnError>       </configuration>     </plugin>   </plugins> </build>  <reporting>   <plugins>     <plugin>       <groupId>org.apache.maven.plugins</groupId>       <artifactId>maven-jxr-plugin</artifactId>       <version>2.5</version>     </plugin>     <plugin>       <groupId>org.apache.maven.plugins</groupId>       <artifactId>maven-checkstyle-plugin</artifactId>       <version>2.17</version>       <configuration>         <configLocation>google_checks.xml</configLocation>         <failOnViolation>false</failOnViolation>         <enableFilesSummary>false</enableFilesSummary>       </configuration>     </plugin>   </plugins> </reporting> 

It seems to run mvn checkstyle:check fine at first. But after a few runs I start getting the following error:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check  (default-cli) on project PROJECT: Failed during checkstyle configuration: cannot initialize  module TreeWalker - Token "METHOD_REF" was not found in Acceptable tokens list in check  com.puppycrawl.tools.checkstyle.checks.whitespace.SeparatorWrapCheck -> [Help 1] 

What does that mean? Why does it only happen some times and how do I get rid of it?

回答1:

Token "METHOD_REF" was not found in Acceptable tokens list in check com.puppycrawl.tools.checkstyle.checks.whitespace.SeparatorWrapCheck

You are trying to use a newer configuration with an old version of Checkstyle.

The configuration at https://github.com/checkstyle/checkstyle/blob/master/src/main/resources/google_checks.xml is in master which is dependent on the snapshot version of checkstyle.

If you are using google configuration without any modifications, you need to use the one that comes embedded in checkstyle. See https://stackoverflow.com/a/35486365/1016482

Otherwise you can integrate a newer version of checkstyle to work with maven. See https://stackoverflow.com/a/27359107/1016482

文章来源: Java google checkstyle Maven