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 ：

安装详情如下：

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-3.0.4\apache-maven\src  
JAVA_HOME C:\Program Files\Java\jdk-1.7.0_04  

添加的路径变量是：

%M2_HOME%\bin;%JAVA_HOME%\bin;

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  

这是我在maven上安装的唯一版本PC和许多博客上提到的解决方案是指删除之前的 M2_HOME 环境变量无效。

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.

我已经阅读并尝试了博客上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 blog ，


• stoveroverflow问题，


• 另一个堆栈问题，


• 一些博客，

• oracle blog,
• stackoverflow question,
• another stack question,
• some blog,

但仍无法达到目标。在这件事中我可能会缺少什么？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 此 文章。对于Maven3，将我的环境变量名称从M2_HOME更改为M3_HOME就可以了。我在使用JDK 1.7运行OSX 10.9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：取消设置M2_HOME

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

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