我正在使用带有Maven 3.3.3的Eclipse Mars(4.5)。
最近,我对一个Java 8项目进行了Maven更新,但突然间,Eclipse不再认为我的pom.xml中的jar有效,而是要求我将打包方式更改为pom。为什么我不能继续使用jar?
此外,在总览中,打包选项被禁用了。
当我使用jar打包从控制台运行maven时,我得到了以下结果:
那就是引起问题的原因。删除它后问题解决了,谢谢!
最近,我对一个Java 8项目进行了Maven更新,但突然间,Eclipse不再认为我的pom.xml中的jar有效,而是要求我将打包方式更改为pom。为什么我不能继续使用jar?
此外,在总览中,打包选项被禁用了。
当我使用jar打包从控制台运行maven时,我得到了以下结果:
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[ERROR] Child module C:\Users\Me\workspace\MyProject\? of C:\Users\Me\workspace\MyProject\pom.xml does not exist @
[ERROR] 'packaging' with value 'jar' is invalid. Aggregator projects require 'pom' as packaging. @ line 8, column 13
@
[ERROR] The build could not read 1 project -> [Help 1]
org.apache.maven.project.ProjectBuildingException: Some problems were encountered while processing the POMs:
[ERROR] Child module C:\Users\Me\workspace\MyProject\? of C:\Users\Me\workspace\MyProject\pom.xml does not exist @
[ERROR] 'packaging' with value 'jar' is invalid. Aggregator projects require 'pom' as packaging. @ line 8, column 13
at org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:422)
at org.apache.maven.graph.DefaultGraphBuilder.collectProjects(DefaultGraphBuilder.java:419)
at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor(DefaultGraphBuilder.java:410)
at org.apache.maven.graph.DefaultGraphBuilder.build(DefaultGraphBuilder.java:83)
at org.apache.maven.DefaultMaven.buildGraph(DefaultMaven.java:491)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:219)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
[ERROR]
[ERROR] The project MyProject:model:0.2 (C:\Users\Me\workspace\MyProject\pom.xml) has 2 errors
[ERROR] Child module C:\Users\Me\workspace\MyProject\? of C:\Users\Me\workspace\MyProject\pom.xml does not exist
[ERROR] 'packaging' with value 'jar' is invalid. Aggregator projects require 'pom' as packaging. @ line 8, column 13
有人能帮我吗?至少重新启用jar包装。
编辑:实际上,我的pom.xml文件中添加了一些新行(我不知道为什么或如何):
<modules>
<module>?</module>
</modules>
那就是引起问题的原因。删除它后问题解决了,谢谢!
maven-compiler-plugin
从1.7编辑为1.8几乎肯定不是问题的原因。你一定做了其他事情。 - durron597