Maven在5分钟内发行

Question

我在5分钟手册中关注Maven,内容如下:

mvn archetype:generate -DgroupId=com.mycompany.app -DartifactId=my-app -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

我收到以下错误:

[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.160s
[INFO] Finished at: Sat Dec 10 16:27:55 ICT 2011
[INFO] Final Memory: 2M/15M
[INFO] ------------------------------------------------------------------------
[ERROR] The goal you specified requires a project to execute but there is no POM in this directory (
D:\experiment\maven). Please verify you invoked Maven from the correct directory. -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[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 arti
cles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MissingProjectException

更多信息:

PS D:\experiment\maven> ping http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-archetype-plugin/2.2/maven-archetype-plugin-2.2.pom
Ping request could not find host http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-archetype-plugin/2.2/maven-archetype-plugin-2.2.pom. Please check the name and try again.

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.869s
[INFO] Finished at: Sat Dec 10 19:03:37 ICT 2011
[INFO] Final Memory: 2M/15M
[INFO] ------------------------------------------------------------------------
[ERROR] The goal you specified requires a project to execute but there is no POM in this directory (
D:\experiment\maven). Please verify you invoked Maven from the correct directory. -> [Help 1]
org.apache.maven.lifecycle.MissingProjectException: The goal you specified requires a project to exe
cute but there is no POM in this directory (D:\experiment\maven). Please verify you invoked Maven fr
om the correct directory.
        at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:89)
        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
        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)
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following arti
cles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MissingProjectException

Answer 1

我使用的是Windows 7 SP1.

我遇到了这个问题因为我使用PowerShell运行它.

当我使用CMD.EXE运行它时它工作正常.

谢谢大家的帮助.

Answer 2

我遇到了同样的问题,看起来我们有类似的设置

• Windows 7的
• 电源外壳
• HTTP代理

这是我要做的事情:

1. 包裹所有"-D..."内部双引号,例如

   mvn archetype:generate "-DarchetypeGroupId=org.apache.maven.archetypes" "-DarchetypeArtifactId=maven-archetype-quickstart" "-DgroupId=com.mycompany.app" "-DartifactId=my-app"
   

2. 确保"HTTP_PROXY"在环境变量中正确设置(通过键入来检查"echo $Env:HTTP_PROXY")

Answer 3

首先，您应该遵循错误消息的建议。使用附加标志调用 Maven 以获取更多信息。

其次，您应该确保您的互联网连接可以通过命令行运行。http://repo1.maven.org/maven2/org/apache/maven/plugins/maven-archetype-plugin/2.2/maven-archetype-plugin-2.2.pom例如，您可以从浏览器下载吗？如果没有，Maven 将无法下载必要的插件，因此在构建项目之前所需的正常引导就无法完成。检查您的浏览器是否使用代理，并且您没有定义环境变量HTTP_PROXY。如果是这种情况，请在 shell 中HTTP_PROXY通过以下命令定义您正在使用的变量：

set HTTP_PROXY=http://<my.proxy.host>:<port>

具有正确的my.proxy.host和值port。如果效果很好，请为系统定义环境变量，以便每个打开的 shell 都定义了该环境变量。

请将这些信息添加到您的问题中，对于致电 的错误建议表示抱歉ping http://....，该建议不起作用。