Maven 错误:无法找到或加载主类 org.codehaus.plexus.classworlds.launcher.Launcher [英] Maven error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher

问题描述

我在 Windows 7 上安装了最新的 maven-3.0.4:
安装细节如下:
安装路径:

I have installed a latest maven-3.0.4 on Windows 7:
The installation details are as follows:
Installation Path :

C:apache-maven-3.0.4  

环境变量是:

M2_HOME C:apache-maven-3.0.4apache-mavensrc  
JAVA_HOME C:Program FilesJavajdk-1.7.0_04  

添加的路径变量是:

%M2_HOME%in;%JAVA_HOME%in;

在命令窗口中它显示如下:

In the command window it shows it like this:

C:>java -version  
java version "1.7.0_04"  
Java(TM) SE Runtime Environment (build 1.7.0_04-b22)  
Java HotSpot(TM) Client VM (build 23.0-b21, mixed mode, sharing)  
C:>mvn -version  
Error: Could not find or load main class org.codehaus.plexus.classworlds.launcher.Launcher  

这是我电脑上唯一安装的 maven 版本，很多博客上提到的删除之前的 M2_HOME 环境变量的解决方案是无效的.

This is the only version on maven installed on my PC and the solution given on many blogs referring to the deletion of the previous M2_HOME environment variable is not valid.

我已阅读并尝试了博客中提供的所有解决方案，例如:

I have read and tried all the solutions given at blogs such as :

• oracle 博客、
• stackoverflow 问题、
• 另一个堆栈问题、
• 一些博客,

但仍然无法达到它.我在这整件事中可能缺少什么?提前致谢.

but still not able to get to it. What I might be missing in this whole thing? Thanks in advance.

推荐答案

我也遇到了这个问题，发现 这篇文章.对于 Maven3，将我的环境变量名称从 M2_HOME 更改为 M3_HOME 可以解决问题.我在运行 OSX 10.9 和 JDK 1.7 的 Mac 上.希望这会有所帮助.

I hit this problem too, and found this article. For Maven3, changing my environment variable name from M2_HOME to M3_HOME did the trick. I am on a Mac running OSX 10.9 with JDK 1.7. Hope this helps.

注意:如果已经设置，请删除 M2_HOME.例如:unset M2_HOME

Note: Please delete M2_HOME, if already set. Eg: unset M2_HOME

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