运行mvn checkstyle时出错:checkstyle

Question

在执行命令mvn checkstyle:checkstyle时，我得到了以下错误

An error has occurred in Checkstyle report generation.
...
Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: cannot initialize module TreeWalker - Unable to instantiate GenericIllegalRegexp
    at com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:178)
    at com.puppycrawl.tools.checkstyle.api.AutomaticBean.configure(AutomaticBean.java:184)
    at org.apache.maven.plugin.checkstyle.DefaultCheckstyleExecutor.executeCheckstyle(DefaultCheckstyleExecutor.java:170)
    at org.apache.maven.plugin.checkstyle.AbstractCheckstyleReport.executeReport(AbstractCheckstyleReport.java:259)
    ... 24 more
Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to instantiate GenericIllegalRegexp
    at com.puppycrawl.tools.checkstyle.PackageObjectFactory.createModule(PackageObjectFactory.java:155)
    at com.puppycrawl.tools.checkstyle.TreeWalker.setupChild(TreeWalker.java:161)
    at com.puppycrawl.tools.checkstyle.api.AutomaticBean.configure(AutomaticBean.java:184)
    at com.puppycrawl.tools.checkstyle.Checker.setupChild(Checker.java:157)
... 27 more
Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Unable to instantiate GenericIllegalRegexpCheck
    at com.puppycrawl.tools.checkstyle.PackageObjectFactory.doMakeObject(PackageObjectFactory.java:98)
    at com.puppycrawl.tools.checkstyle.PackageObjectFactory.createModule(PackageObjectFactory.java:152)
    ... 30 more

我猜这个错误与使用较旧版本的checkstyle创建的规则有关。

pom.xml中的checkstyle插件配置如下：

...
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-checkstyle-plugin</artifactId>
<version>2.9.1</version>
<configuration>
    <configLocation>checkstyle.xml</configLocation>
    <headerLocation>LICENSE.txt</headerLocation>
</configuration>
</plugin>
...

有没有一种方法或工具可以迁移规则，使其与checkstyle 5.5兼容？(不是根据检查样式文档查看每个规则的规则)

Answer 1

我已经设法摆脱了修改规则的xml的那个特殊异常。

我已经替换了：

<module name="GenericIllegalRegexp">
  <property name="format" value="\s+$"/>
  <property name="message" value="Line has trailing spaces."/>
  <property name="ignoreComments" value="true"/>
</module>

使用

<module name="RegexpSinglelineJava">
  <property name="format" value="\s+$"/>
  <property name="message" value="Line has trailing spaces."/>
  <property name="ignoreComments" value="true"/>
</module>

希望我帮助了有同样问题的人。致以问候。