文章目录

• 一、报错信息
• 二、问题分析
• 三、解决方案

一、报错信息

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编译 Groovy 代码时 , 报如下错误 , 该错误不是代码错误 , 而是 Groovy 工程的环境配置错误 ;

相同的环境 , 昨天还能编译 , 今天出现问题了 ;

10:37:17: Executing task 'Test.main()'...> Task :compileJava NO-SOURCE > Task :compileGroovy FAILED 1 actionable task: 1 executedFAILURE: Build failed with an exception.* What went wrong: Execution failed for task ':compileGroovy'. > org/apache/tools/ant/taskdefs/Java* Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.* Get more help at https://help.gradle.orgBUILD FAILED in 1s 10:37:18: Task execution finished 'Test.main()'.

完整报错信息 : 使用 --stacktrace 参数 , 即可打印出完整的报错信息 ;

11:00:32: Executing task 'Test.main() --stacktrace'...> Task :compileJava NO-SOURCE > Task :compileGroovy FAILED 1 actionable task: 1 executedFAILURE: Build failed with an exception.* What went wrong: Execution failed for task ':compileGroovy'. > org/apache/tools/ant/taskdefs/Java* Try: Run with --info or --debug option to get more log output. Run with --scan to get full insights.* Exception is: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':compileGroovy'.at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$2.accept(ExecuteActionsTaskExecuter.java:121)at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$2.accept(ExecuteActionsTaskExecuter.java:117)at org.gradle.internal.Try$Failure.ifSuccessfulOrElse(Try.java:184)at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:110)at org.gradle.api.internal.tasks.execution.ResolveIncrementalChangesTaskExecuter.execute(ResolveIncrementalChangesTaskExecuter.java:84)at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:91)at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionStateTaskExecuter.execute(ResolveBeforeExecutionStateTaskExecuter.java:74)at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:109)at org.gradle.api.internal.tasks.execution.ResolveBeforeExecutionOutputsTaskExecuter.execute(ResolveBeforeExecutionOutputsTaskExecuter.java:67)at org.gradle.api.internal.tasks.execution.ResolveAfterPreviousExecutionStateTaskExecuter.execute(ResolveAfterPreviousExecutionStateTaskExecuter.java:46)at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:93)at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:45)at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:94)at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57)at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56)at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36)at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:63)at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:49)at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:46)at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:46)at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:43)at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:355)at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:343)at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:336)at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:322)at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:134)at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker$1.execute(DefaultPlanExecutor.java:129)at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:202)at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:193)at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:129)at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) Caused by: java.lang.NoClassDefFoundError: org/apache/tools/ant/taskdefs/Javaat org.gradle.api.internal.tasks.compile.ApiGroovyCompiler.execute(ApiGroovyCompiler.java:179)at org.gradle.api.internal.tasks.compile.ApiGroovyCompiler.execute(ApiGroovyCompiler.java:57)at org.gradle.api.internal.tasks.compile.GroovyCompilerFactory$DaemonSideCompiler.execute(GroovyCompilerFactory.java:80)at org.gradle.api.internal.tasks.compile.GroovyCompilerFactory$DaemonSideCompiler.execute(GroovyCompilerFactory.java:68)at org.gradle.api.internal.tasks.compile.daemon.AbstractDaemonCompiler$CompilerCallable.call(AbstractDaemonCompiler.java:86)at org.gradle.api.internal.tasks.compile.daemon.AbstractDaemonCompiler$CompilerCallable.call(AbstractDaemonCompiler.java:74)at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:42)at org.gradle.workers.internal.WorkerDaemonServer.execute(WorkerDaemonServer.java:38)at org.gradle.process.internal.worker.request.WorkerAction.run(WorkerAction.java:111)at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:175)at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:157)at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:404)... 3 more Caused by: java.lang.ClassNotFoundException: org.apache.tools.ant.taskdefs.Java... 17 more* Get more help at https://help.gradle.orgBUILD FAILED in 1s 11:00:33: Task execution finished 'Test.main() --stacktrace'.

二、问题分析

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错误是由于没有找到 org.apache.tools.ant.taskdefs.Java 类导致的 ; 查看 工程的 外部依赖库 , 没有看到 apache 相关的库 ;

尝试删除 .gradle , build , .idea 三个目录 , 编译也会报错 ;

即使屏蔽了所有代码 , 也是报错 , 说明这是 Groovy 构建环境导致的错误 ;

当前出现错误的 Groovy 工程构建配置 :
groovy_demo\gradle\wrapper\gradle-wrapper.properties 中配置的 Gradle 工具版本号是 $5.2.1$ ;

distributionBase=GRADLE_USER_HOME distributionPath=wrapper/dists distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-bin.zip zipStoreBase=GRADLE_USER_HOME zipStorePath=wrapper/dists

在 Groovy 工程根目录 配置的 build.gradle 构建脚本 内容如下 :

plugins {id 'groovy'id 'java' }group 'org.example' version '1.0-SNAPSHOT'sourceCompatibility = 1.8repositories {mavenCentral() }dependencies {compile 'org.codehaus.groovy:groovy-all:2.3.11'testCompile group: 'junit', name: 'junit', version: '4.12' }

找了半天没找出原因 , 直接创建一个新的工程 , 查看其配置 :

新工程使用 $6.8$ 版本的 Gradle 工具 ;

distributionBase=GRADLE_USER_HOME distributionPath=wrapper/dists distributionUrl=https\://services.gradle.org/distributions/gradle-6.8-bin.zip zipStoreBase=GRADLE_USER_HOME zipStorePath=wrapper/dists

配置的 build.gradle 构建脚本内容如下 :

plugins {id 'groovy'id 'java' }group 'org.example' version '1.0-SNAPSHOT'repositories {mavenCentral() }dependencies {implementation 'org.codehaus.groovy:groovy-all:3.0.5'testImplementation 'org.junit.jupiter:junit-jupiter-api:5.6.0'testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.0'testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.7.0' }test {useJUnitPlatform() }

外部依赖库 :

三、解决方案

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使用新的 build.gradle 的相关配置 , 只需要修改

org.codehaus.groovy:groovy-all

依赖的版本为 $3.0.5$ 即可 , 其它的配置不动 ;

最终的 build.gradle 构建脚本如下 :

plugins {id 'groovy'id 'java' }group 'org.example' version '1.0-SNAPSHOT'sourceCompatibility = 1.8repositories {mavenCentral() }dependencies {compile 'org.codehaus.groovy:groovy-all:3.0.5'testCompile group: 'junit', name: 'junit', version: '4.12' }

修改完毕后 , Groovy 代码执行成功 ;

总结

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