‘mvn’ is not recognized as an internal or external command, operable program or batch file.

Win7下给Maven配置环境变量，通过桌面控制面板操作，无论怎么设置都不起作用，始终输出“不是内部命令”之类的结果。

后来找到下面的解决方法，通过cmd设置环境变量，最后才解决问题。

set M2_HOME "D:\Program Files\Maven\apache-maven-3.3.3"
set M2=%M2_HOME%\bin
set path=%path%;%M2%

http://www.javadomain.in/tag/mvn-is-not-recognized-as-an-internal-or-external-command/
Maven path has not been set. So windows can not recognize mvn command.

Solution:

Set the maven path in cmd like this,