Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin

idea编译项目时，出现如下报错：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check (validate) on project devops-brain: Failed during checkstyle configuration: Cannot set property 'cacheFile' to 'F:\Copote\Code\devops-brain\devops-brain\target/checkstyle-cachefile': InvocationTargetException: com/google/common/io/Flushables: com.google.common.io.Flushables -> [Help 1]

 进入pom.xml所在目录，如图：

执行如下命令，查看详细日志：

mvn clean package -e -X

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check (validate) on project devops-brain: Failed during checkstyle configuration: Cannot set property 'cacheFile' to 'target/c
achefile': InvocationTargetException: com/google/common/io/Flushables: com.google.common.io.Flushables -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check (validate) on project devops-brain: Failed during checkstyle configurati
on
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:213)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
    ...
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: org.apache.maven.plugin.MojoExecutionException: Failed during checkstyle configuration
    at org.apache.maven.plugins.checkstyle.CheckstyleViolationCheckMojo.execute (CheckstyleViolationCheckMojo.java:534)
    ...
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: com.puppycrawl.tools.checkstyle.api.CheckstyleException: Cannot set property 'cacheFile' to 'target/cachefile'
    at com.puppycrawl.tools.checkstyle.api.AutomaticBean.tryCopyProperty (AutomaticBean.java:237)
    at com.puppycrawl.tools.checkstyle.api.AutomaticBean.configure (AutomaticBean.java:191)
    ...
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    ...
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: java.lang.NoClassDefFoundError: com/google/common/io/Flushables
    at com.puppycrawl.tools.checkstyle.PropertyCacheFile.flushAndCloseOutStream (PropertyCacheFile.java:167)
    ...
Caused by: java.lang.ClassNotFoundException: com.google.common.io.Flushables
    at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass (SelfFirstStrategy.java:50)
    ...
    at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
[ERROR]
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException

定位到日志：

Caused by: java.lang.ClassNotFoundException: com.google.common.io.Flushables

这个类在如下依赖jar包中，在pom中添加如下依赖：

<dependency>
	<groupId>com.google.guava</groupId>
	<artifactId>guava</artifactId>
	<version>20.0</version>
</dependency>

如果依赖引入后还不行，请删除本地maven库中guava目录，重新导入： 

重新编译项目，如果没其他错误，即可成功。不幸的是，作者编译后继续报错如下：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.0.0:check (validate) on project devops-brain-manager-bean: Failed during checkstyle execution: There are 8 errors reported by Checkstyle 8.18 with ../../code-style/checkstyle.xml ruleset. -> [Help 1]
 

继续执行如下命令，查看详细日志：

mvn clean package -e -X

如图：

[INFO] 寮?濮嬫鏌モ?︹??
[ERROR] F:\Copote\Code\...\dto\AlertRuleDto.java:7:4: 鏈煡鏍囩 'description' 銆? [JavadocType
]
[ERROR] F:\Copote\Code\...\entity\AlertRuleEntity.java:7:4: 鏈煡鏍囩 'description' 銆? [Javad
ocType]
[ERROR] F:\Copote\Code\...\entity\AlertsEntity.java:7:4: 鏈煡鏍囩 'description' 銆? [JavadocT
ype]
[ERROR] F:\Copote\Code\...\entity\BaseEntity.java:12:47: WhitespaceAround: '{' is not preceded wi
th whitespace. [WhitespaceAround]
[ERROR] F:\Copote\Code\...\entity\HostConfigEntity.java:11:49: WhitespaceAround: '{' is not prece
ded with whitespace. [WhitespaceAround]
[ERROR] F:\Copote\Code\...\entity\HostEntity.java:7:4: 鏈煡鏍囩 'Author' 銆? [JavadocType]
[ERROR] F:\Copote\Code\...\entity\HostEntity.java:8:4: 鏈煡鏍囩 'Date' 銆? [JavadocType]
[ERROR] F:\Copote\Code\...\entity\HostEntity.java:9:4: 鏈煡鏍囩 'Version' 銆? [JavadocType]
[ERROR] F:\Copote\Code\...\entity\HostEntity.java:10:4: 鏈煡鏍囩 'Description' 銆? [JavadocTy
pe]
[ERROR] F:\Copote\Code\...\entity\HostTagEntity.java:6: 缂哄皯 Javadoc 銆? [JavadocType]
[ERROR] F:\Copote\Code\...\entity\MetricEntity.java:8:4: 鏈煡鏍囩 'description' 銆? [JavadocT
ype]
[ERROR] F:\Copote\Code\...\entity\MetricTemplateEntity.java:7:4: 鏈煡鏍囩 'description' 銆? [
JavadocType]
妫?鏌ュ畬鎴愩??
[INFO] ------------------------------------------------------------------------
...
Caused by: org.apache.maven.plugins.checkstyle.exec.CheckstyleExecutorException: There are 12 errors reported by Checkstyle 8.18 with ../../code-style/checkstyle.xml ruleset.
    at org.apache.maven.plugins.checkstyle.exec.DefaultCheckstyleExecutor.executeCheckstyle (DefaultCheckstyleExecutor.java:309)

定位到日志：

There are 8 errors reported by Checkstyle 8.18 with ../../code-style/checkstyle.xml ruleset. -> [Help 1]

原因是存在多处代码不符合风格。逐个检查修改即可。