java 为什么用Maven构建项目时系统找不到指定的路径？
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Why can't the system find the path specified when building project with Maven?
提问by glennvdv
I am trying to start a Groovy/Java project from scratch. I have created a Groovy class with a test.
我正在尝试从头开始一个 Groovy/Java 项目。我创建了一个带有测试的 Groovy 类。
When building, I am getting the following error:
构建时，我收到以下错误：
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project repository: Compilation failure
[ERROR] Failure executing groovy-eclipse compiler:
[ERROR] The system cannot find the path specified.
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on projec
t repository: Compilation failure
Failure executing groovy-eclipse compiler:
The system cannot find the path specified.
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.compiler.CompilationFailureException: Compilation failure
Failure executing groovy-eclipse compiler:
The system cannot find the path specified.
at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:858)
at org.apache.maven.plugin.compiler.CompilerMojo.execute(CompilerMojo.java:129)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
... 19 more
I have run Process monitor to see what path's it could not find and is says the following:
我已经运行 Process monitor 以查看它找不到什么路径，并显示以下内容：
D:\Programmeren\Workspace\BirthdayAppV2\JAVA_HOME\bin\
D:\Programmeren\Workspace\BirthdayAppV2\ GROOVY_HOME\bin\
D:\Programmeren\Workspace\BirthdayAppV2\domain${env.JAVA_HOME_7}\bin\javac
D:\Programmeren\Workspace\BirthdayAppV2\domain${env.JAVA_HOME_7}\bin\
It seems maven isn't using my JAVA_HOME variables correctly.
似乎 maven 没有正确使用我的 JAVA_HOME 变量。
Does someone have a solution to this problem?
有人有解决这个问题的方法吗？
This is my main pom:
这是我的主要pom：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>be.vandevelde.glenn</groupId>
<artifactId>BirthdayAppV2</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>pom</packaging>
<name>BirthdayManagerV2</name>
<properties>
<java.version>1.7</java.version>
<spring.version>3.2.2</spring.version>
<groovyVersion>2.1.3</groovyVersion>
</properties>
<modules>
<module>repository</module>
<module>domain</module>
</modules>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.8.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.spockframework</groupId>
<artifactId>spock-core</artifactId>
<version>0.7-groovy-2.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>${groovyVersion}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<compilerId>groovy-eclipse-compiler</compilerId>
<!-- set verbose to be true if you want lots of uninteresting messages -->
<!-- <verbose>true</verbose> -->
</configuration>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<version>2.7.0-01</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-batch</artifactId>
<version>2.1.3-01</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<version>2.7.0-01</version>
<extensions>true</extensions>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<id>add-source</id>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>src/main/groovy</source>
</sources>
</configuration>
</execution>
<execution>
<id>add-test-source</id>
<phase>generate-test-sources</phase>
<goals>
<goal>add-test-source</goal>
</goals>
<configuration>
<sources>
<source>src/test/groovy</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>${java.version}</source>
<target>${java.version}</target>
<showDeprecation>true</showDeprecation>
<showWarnings>true</showWarnings>
<executable>${env.JAVA_HOME_7}/bin/javac</executable>
<fork>true</fork>
</configuration>
</plugin>
</plugins>
</build>
采纳答案by Jens Birger Hahn
There is probably more than one problem with your setup. First, the output of your environment indicates that evironment variables are not properly resolved (D:\Programmeren\Workspace\BirthdayAppV2\JAVA_HOME\bin\- is this the path to your JDK?). Setting JAVA_HOME and the Maven environment variables is documented on the respective project pages. You should start with that.
您的设置可能存在多个问题。首先，您的环境的输出表明环境变量没有正确解析（D:\Programmeren\Workspace\BirthdayAppV2\JAVA_HOME\bin\- 这是您的 JDK 的路径吗？）。设置 JAVA_HOME 和 Maven 环境变量记录在各自的项目页面上。你应该从那个开始。
Afterwards, I suggest you rebuild your Maven configuration and carefully readthe Groovy-Eclipse-Plug-in for Maven Wiki Entryand start with a simpler configuration like this one, which compiles both Java 7 and Groovy files:
后来，我建议你重建Maven配置，并仔细阅读了Groovy的Eclipse的插件为Maven的维基条目，并与像这样的，这条命令编译的Java 7和Groovy文件简单的配置开始：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>your.group</groupId>
<artifactId>groovy-eclipse-compiler-maven-example</artifactId>
<version>1-SNAPSHOT</version>
<name>groovy-eclipse-compiler-maven-example</name>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.source.encoding>UTF-8</project.source.encoding>
<java.source.version>1.7</java.source.version>
<java.target.version>1.7</java.target.version>
<junit.version>4.10</junit.version>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.6</version>
<configuration>
<includeEmptyDirs>true</includeEmptyDirs>
</configuration>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<compilerId>groovy-eclipse-compiler</compilerId>
<source>${java.source.version}</source>
<target>${java.target.version}</target>
</configuration>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<version>2.7.0-01</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-all</artifactId>
<version>2.0.4</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
It is important that the src/main/javaand src/test/javasource directories are notempty, as mentioned in the documentation. (Tested with Maven 3.0.3, JDK 1.7.0.21 on Ubuntu)
如文档中所述src/main/java，src/test/java源目录和源目录不为空很重要。（在 Ubuntu 上使用 Maven 3.0.3、JDK 1.7.0.21 测试）
Good luck!
祝你好运！
