所以，我的build.gradle看起来像这样，
task compile(type: Compile){
dependsOn 'clean', 'init'
classpath = files('bin',
'lib\\foo-agent-dist-2.0.0-SNAPSHOT.jar',
'lib\\foo-common-2.0.0-SNAPSHOT.jar',
'lib\\foo-communication-api-2.0.0-SNAPSHOT.jar',
'lib\\spring-beans-3.1.2.RELEASE.jar',
'lib\\spring-context-3.1.2.RELEASE.jar',
'lib\\spring-web-3.1.2.RELEASE.jar',
'lib\\sqljdbc4-3.0.jar')
destinationDir = file('bin')
source = fileTree('src')
sourceCompatibility = '1.7'
targetCompatibility = '1.7'
}
task clean(type: Delete){
delete 'bin'
}
task init(type: Copy){
//TODO: Create "bin" directory if it doesn't exist
from 'src'
into 'bin'
exclude '**/*.java', '**/*.bak'
includeEmptyDirs = false
}
当我执行compile任务时，我得到以下异常
[sts] -----------------------------------------------------
[sts] Starting Gradle build for the following tasks:
[sts] :compile
[sts] -----------------------------------------------------
:clean
:init
:compile
FAILURE: Build failed with an exception.
* What went wrong:
A problem was found with the configuration of task ':compile'.
> No value has been specified for property 'dependencyCacheDir'.
* Try:
Run with --info or --debug option to get more log output.
* Exception is:
org.gradle.api.tasks.TaskValidationException: A problem was found with the configuration of task ':compile'.
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:54)
at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:41)
at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:51)
at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:52)
at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:42)
at org.gradle.api.internal.AbstractTask.executeWithoutThrowingTaskFailure(AbstractTask.java:247)
at org.gradle.execution.DefaultTaskGraphExecuter.executeTask(DefaultTaskGraphExecuter.java:192)
at org.gradle.execution.DefaultTaskGraphExecuter.doExecute(DefaultTaskGraphExecuter.java:177)
at org.gradle.execution.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:83)
at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:36)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:67)
at org.gradle.api.internal.changedetection.TaskCacheLockHandlingBuildExecuter$1.run(TaskCacheLockHandlingBuildExecuter.java:31)
at org.gradle.cache.internal.DefaultCacheAccess$1.create(DefaultCacheAccess.java:111)
at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:126)
at org.gradle.cache.internal.DefaultCacheAccess.useCache(DefaultCacheAccess.java:109)
at org.gradle.cache.internal.DefaultPersistentDirectoryStore.useCache(DefaultPersistentDirectoryStore.java:103)
at org.gradle.api.internal.changedetection.DefaultTaskArtifactStateCacheAccess.useCache(DefaultTaskArtifactStateCacheAccess.java:79)
at org.gradle.api.internal.changedetection.TaskCacheLockHandlingBuildExecuter.execute(TaskCacheLockHandlingBuildExecuter.java:29)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
at org.gradle.execution.DefaultBuildExecuter.access$200(DefaultBuildExecuter.java:23)
at org.gradle.execution.DefaultBuildExecuter$2.proceed(DefaultBuildExecuter.java:67)
at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:61)
at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:54)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:155)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:110)
at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:78)
at org.gradle.tooling.internal.provider.ExecuteBuildAction.run(ExecuteBuildAction.java:31)
at org.gradle.tooling.internal.provider.ConfiguringBuildAction.run(ConfiguringBuildAction.java:94)
at org.gradle.launcher.daemon.protocol.Build.run(Build.java:68)
at org.gradle.launcher.daemon.protocol.Build.run(Build.java:64)
at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:45)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:45)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:24)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.StartStopIfBuildAndStop.execute(StartStopIfBuildAndStop.java:28)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.ReturnResult.execute(ReturnResult.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput$4.call(ForwardClientInput.java:116)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput$4.call(ForwardClientInput.java:114)
at org.gradle.util.Swapper.swap(Swapper.java:38)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:114)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:60)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:61)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy.doBuild(StartBuildOrRespondWithBusy.java:49)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.HandleStop.execute(HandleStop.java:34)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.CatchAndForwardDaemonFailure.execute(CatchAndForwardDaemonFailure.java:32)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.HandleClientDisconnectBeforeSendingCommand.execute(HandleClientDisconnectBeforeSendingCommand.java:21)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.StopConnectionAfterExecution.execute(StopConnectionAfterExecution.java:27)
at org.gradle.launcher.daemon.server.exec.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
at org.gradle.launcher.daemon.server.exec.DefaultDaemonCommandExecuter.executeCommand(DefaultDaemonCommandExecuter.java:55)
at org.gradle.launcher.daemon.server.Daemon$1$1.run(Daemon.java:123)
at org.gradle.messaging.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:66)
Caused by: org.gradle.api.InvalidUserDataException: No value has been specified for property 'dependencyCacheDir'.
at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:46)
... 68 more
BUILD FAILED
为什么编译java项目需要定义dependencyCacheDir？当我定义依赖缓存dir时，它抱怨它无法找到System Java Compiler。
什么？为什么！？什么给，gradle？这整个过程非常令人沮丧，而且不必要地复杂化......完全放弃它。
答案 0 :(得分：4)
如果您决定使用Java插件：
apply plugin : 'java'
sourceCompatibility = '1.7'
targetCompatibility = '1.7'
sourceSets {
main {
java {
srcDirs = ['src']
}
}
}
buildDir = 'bin'
repositories {
flatDir dirs: 'lib'
}
dependencies {
compile ':foo-agent-dist:2.0.0-SNAPSHOT',
':foo-common:2.0.0-SNAPSHOT',
':foo-communication-api:2.0.0-SNAPSHOT',
':spring-beans:3.1.2.RELEASE',
':spring-context:3.1.2.RELEASE',
':spring-web:3.1.2.RELEASE',
':sqljdbc4:3.0'
}
答案 1 :(得分：3)
使用JavaCompile任务类型可能会更好。
答案 2 :(得分：2)
为什么不使用Java插件？手动配置所有内容将需要更多的努力。
如果您需要有关“system java compiler”错误的帮助，请发布错误消息和堆栈跟踪。
答案 3 :(得分：2)
这对我有用，只需对您的代码进行必要的更改，以此为例
apply plugin: 'java'
configurations {
querydslapt
}
sourceSets {
target
}
sourceSets.target.java.srcDirs = ['src/main/target']
dependencies {
compile ...libraries....
querydslapt 'com.mysema.querydsl:querydsl-apt:2.7.1'
testCompile project(':fastappoint-test')
}
task generateQueryDSL(type: Compile, group: 'build', description: 'Generates the QueryDSL query types') {
source = sourceSets.main.java
classpath = configurations.compile + configurations.querydslapt
options.compilerArgs = [
"-proc:only",
"-processor", "com.mysema.query.apt.jpa.JPAAnnotationProcessor"
]
destinationDir = sourceSets.target.java.srcDirs.iterator().next()
dependencyCacheDir = new File(destinationDir, "dependencyCacheDir")
}
compileJava.dependsOn generateQueryDSL