在试图从子POM引用父POM的${parent.groupId}时出现“无法解析的父POM: 无法传输构件”的错误。

20
我正在跟着一个Maven的教程学习。我有一个非常简单的项目,内部有几个模块。在模块的pom文件中,我想通过${parent.groupid}和${parent.version}引用主项目的pom版本和组,这样如果我更改了其中任何一个,就不必去查找子pom并进行更改。但是我遇到了"Non-resolvable parent POM: Could not transfer artifact"错误。我已经在stackoverflow上看过几个相关问题,但是没有找到帮助我的答案。我的目录结构如下:
tutorial_maven(dir)
 --> pom.xml(file)
 --> tutorial_maven_jar(dir)
     --> pom.xml(file)

我遇到了以下错误:

Apache Maven 3.0.4 (r1232337; 2012-01-17 03:44:56-0500)
Maven home: C:\Program Files (x86)\apache-maven-3.0.4
Java version: 1.7.0_09, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.7.0_09\jre
Default locale: es_EC, platform encoding: UTF-8
OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"
[INFO] Error stacktraces are turned on.
[DEBUG] Reading global settings from C:\Program Files (x86)\apache-maven-3.0.4\conf\settings.xml
[DEBUG] Reading user settings from C:\Users\fureta.DESARROLLO03\.m2\settings.xml
[WARNING] Command line option -npr is deprecated and will be removed in future Maven versions.
[DEBUG] Using local repository at C:\Users\fureta.DESARROLLO03\.m2\repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10 for C:\Users\fureta.DESARROLLO03\.m2\repository
[INFO] Scanning for projects...
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://repo.maven.apache.org/maven2
Downloading: http://repo.maven.apache.org/maven2/${parent/groupId}/tutorial_maven/${parent.version}/tutorial_maven-${parent.version}.pom
[DEBUG] Writing resolution tracking file C:\Users\fureta.DESARROLLO03\.m2\repository\${parent\groupId}\tutorial_maven\${parent.version}\tutorial_maven-${parent.version}.pom.lastUpdated
[DEBUG] Extension realms for project org.felipe:tutorial_maven:pom:1.0-SNAPSHOT: (none)
[DEBUG] Looking up lifecyle mappings for packaging pom from ClassRealm[plexus.core, parent: null]
[DEBUG] Extension realms for project org.felipe:tutorial_maven_webapp:war:1.0-SNAPSHOT: (none)
[DEBUG] Looking up lifecyle mappings for packaging war from ClassRealm[plexus.core, parent: null]
[ERROR] The build could not read 1 project -> [Help 1]
org.apache.maven.project.ProjectBuildingException: Some problems were encountered while processing the POMs:
[WARNING] 'parent.relativePath' points at org.felipe:tutorial_maven instead of ${parent.groupId}:tutorial_maven, please verify your project structure @ line 3, column 13
[FATAL] Non-resolvable parent POM: Could not transfer artifact ${parent.groupId}:tutorial_maven:pom:${parent.version} from/to central (http://repo.maven.apache.org/maven2): Illegal character in path at index 37: http://repo.maven.apache.org/maven2/${parent/groupId}/tutorial_maven/${parent.version}/tutorial_maven-${parent.version}.pom and 'parent.relativePath' points at wrong local POM @ line 3, column 13

at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:363)
at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:636)
at org.apache.maven.DefaultMaven.getProjectsForMavenReactor(DefaultMaven.java:585)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:234)
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)
at org.codehaus.classworlds.Launcher.main(Launcher.java:47)
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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
[ERROR]   
[ERROR]   The project ${parent.groupId}:tutorial_maven_jar:${parent.version} (C:\Users\fureta.DESARROLLO03\IdeaProjects\tutorial_maven\tutorial_maven_jar\pom.xml) has 1 error
[ERROR]     Non-resolvable parent POM: Could not transfer artifact  ${parent.groupId}:tutorial_maven:pom:${parent.version} from/to central  (http://repo.maven.apache.org/maven2): Illegal character in path at index 37:  http://repo.maven.apache.org/maven2/${parent/groupId}/tutorial_maven/${parent.version}/tuto rial_maven-${parent.version}.pom and 'parent.relativePath' points at wrong local POM @ line  3, column 13 -> [Help 2]
org.apache.maven.model.resolution.UnresolvableModelException: Could not transfer  artifact ${parent.groupId}:tutorial_maven:pom:${parent.version} from/to central  (http://repo.maven.apache.org/maven2): Illegal character in path at index 37:  http://repo.maven.apache.org/maven2/${parent/groupId}/tutorial_maven/${parent.version}/tuto rial_maven-${parent.version}.pom
at  org.apache.maven.project.ProjectModelResolver.resolveModel(ProjectModelResolver.java:159)
at org.apache.maven.model.building.DefaultModelBuilder.readParentExternally(DefaultModelBuilder.java:813)
at org.apache.maven.model.building.DefaultModelBuilder.readParent(DefaultModelBuilder.java:664)
at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:310)
at org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:232)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:410)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:379)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:495)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:379)
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:343)
at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:636)
at org.apache.maven.DefaultMaven.getProjectsForMavenReactor(DefaultMaven.java:585)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:234)
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)
at org.codehaus.classworlds.Launcher.main(Launcher.java:47)
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 com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)
Caused by: org.sonatype.aether.resolution.ArtifactResolutionException: Could not  transfer artifact ${parent.groupId}:tutorial_maven:pom:${parent.version} from/to central  (http://repo.maven.apache.org/maven2): Illegal character in path at index 37:  http://repo.maven.apache.org/maven2/${parent/groupId}/tutorial_maven/${parent.version}/tuto rial_maven-${parent.version}.pom
at  org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolve(DefaultArtifactResolver.java:538)
at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:216)
at org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:193)
at org.sonatype.aether.impl.internal.DefaultRepositorySystem.resolveArtifact(DefaultRepositorySystem.java:286)
at org.apache.maven.project.ProjectModelResolver.resolveModel(ProjectModelResolver.java:155)
... 30 more
Caused by: org.sonatype.aether.transfer.ArtifactTransferException: Could not transfer artifact ${parent.groupId}:tutorial_maven:pom:${parent.version} from/to central (http://repo.maven.apache.org/maven2): Illegal character in path at index 37: http://repo.maven.apache.org/maven2/${parent/groupId}/tutorial_maven/${parent.version}/tutorial_maven-${parent.version}.pom
at org.sonatype.aether.connector.wagon.WagonRepositoryConnector$4.wrap(WagonRepositoryConnector.java:951)
at org.sonatype.aether.connector.wagon.WagonRepositoryConnector$4.wrap(WagonRepositoryConnector.java:941)
at org.sonatype.aether.connector.wagon.WagonRepositoryConnector$GetTask.run(WagonRepositoryConnector.java:669)
at org.sonatype.aether.util.concurrency.RunnableErrorForwarder$1.run(RunnableErrorForwarder.java:60)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.IllegalArgumentException: Illegal character in path at index 37: http://repo.maven.apache.org/maven2/${parent/groupId}/tutorial_maven/${parent.version}/tutorial_maven-${parent.version}.pom
at java.net.URI.create(URI.java:859)
at org.apache.maven.wagon.providers.http.httpclient.client.methods.HttpGet.<init>(HttpGet.java:69)
at org.apache.maven.wagon.shared.http4.AbstractHttpClientWagon.fillInputData(AbstractHttpClientWagon.java:778)
at org.apache.maven.wagon.StreamWagon.getInputStream(StreamWagon.java:116)
at org.apache.maven.wagon.StreamWagon.getIfNewer(StreamWagon.java:88)
at org.apache.maven.wagon.StreamWagon.get(StreamWagon.java:61)
at      org.sonatype.aether.connector.wagon.WagonRepositoryConnector$GetTask.run(WagonRepositoryConnector.java:601)
... 4 more
Caused by: java.net.URISyntaxException: Illegal character in path at index 37: http://repo.maven.apache.org/maven2/${parent/groupId}/tutorial_maven/${parent.version}/tutorial_maven-${parent.version}.pom
at java.net.URI$Parser.fail(URI.java:2829)
at java.net.URI$Parser.checkChars(URI.java:3002)
at java.net.URI$Parser.parseHierarchical(URI.java:3086)
at java.net.URI$Parser.parse(URI.java:3034)
at java.net.URI.<init>(URI.java:595)
at java.net.URI.create(URI.java:857)
... 10 more
[ERROR] 
[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/ProjectBuildingException
[ERROR] [Help 2]   http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException

我已经阅读了Help 1和Help 2中的链接,但没有找到任何有用的帮助。从日志中我理解的是Maven正在查找我的主POM文件在Maven仓库中的位置...

我错过了什么吗?

这是我的主要pom.xml文件。

<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>org.felipe</groupId>
  <artifactId>tutorial_maven</artifactId>
  <version>1.0-SNAPSHOT</version>
    <modules>
        <module>tutorial_maven_jar</module>
        <module>tutorial_maven_webapp</module>
    </modules>
    <packaging>pom</packaging>

  <name>tutorial_maven</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <!--<log4j.version>1.2.17</log4j.version>-->
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

我的模块pom.xml文件:

<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">
    <parent>
        <artifactId>tutorial_maven</artifactId>
        <groupId>${parent.groupId}</groupId>
        <version>${parent.version}</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
    <modelVersion>4.0.0</modelVersion>

    <artifactId>tutorial_maven_jar</artifactId>
    <packaging>jar</packaging>

    <name>tutorial_maven_jar</name>
    <url>http://maven.apache.org</url>

    <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                </configuration>
            </plugin>
        </plugins>
    </build>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
            <!--<optional>true</optional>-->
        </dependency>

        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
    </dependencies>
</project>

最好的问候, Felipe

4个回答

11

看起来你想要同时从父pom继承groupId并且使用继承的groupId指定父pom!

在子pom中,可以使用以下方式:

<modelVersion>4.0.0</modelVersion>

<parent>
  <groupId>org.felipe</groupId>
  <artifactId>tutorial_maven</artifactId>
  <version>1.0-SNAPSHOT</version>
  <relativePath>../pom.xml</relativePath>
</parent>

<artifactId>tutorial_maven_jar</artifactId>

在那里使用像${project.groupId}这样的属性是行不通的。如果您以这种方式指定父级,则可以在子POM中继承groupId和version。因此,您只需要在子POM中指定artifactId。


1
你好马丁,这就是我最初的设置,我一直在跟着教程做,也许我误解了教程。从我看到的情况来看,如果我更改了父POM中的版本号,那么我必须手动更改子POM中的版本号? - Felipe
2
是的,但你可以使用版本插件来自动化这个过程,这样你就不必手动编辑每一个版本。如果你从顶层pom运行mvn versions:set -DnewVersion=x.y.z,那么它将在所有子模块上设置此版本的顶层pom。更多信息请参见:http://mojo.codehaus.org/versions-maven-plugin/set-mojo.html - Martin Ellis

10

我假设问题已经得到了解答。如果以上解决方案不能解决问题,那么可以使用以下方法来解决。

如果 Maven 用户设置没有正确反映 settings.xml 文件,则会出现此问题。

要更新设置文件,请转到“Windows”>“首选项”>“Maven”>“用户设置”,并将 settings.xml 更新为正确的位置。

完成后重新构建项目,这些步骤应该能够解决问题。 谢谢。


好的建议。我已经检查过了,不幸的是我的settings.xml文件位置是正确的。 - linnse

3

我曾经遇到同样的问题。通过在父文件夹中添加一个包含<modules>列表的pom.xml文件解决了问题。


0

正如Nayan所说,路径必须正确更新。 在我的情况下,apache-maven安装在C:\ apache-maven 中, 并且 settings.xml 位于 C:\ apache-maven \ conf \ settings.xml 中。

如果这不起作用,请转到本地存储库
在我这种情况下 C:\ Users \ <<"name">>.m2 \
然后搜索 .lastUpdated 并将它们删除
然后构建 maven


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