【Maven】Unknown lifecycle phase “.skip.test=true“.

• idea 终端执行如下命令时

mvn clean install -Dmaven.skip.test=true

• 报：

Unknown lifecycle phase ".skip.test=true". You must specify a valid lifecycle phase or a goal in the format <plugin-prefix>:<goal> or 
<plugin-group-id>:<plugiprepare-package, package, pre-integration-test, integration-test, post-integration-test, verify, install, deploy, pre-clean, clean, post-clean, pre-site, site, post-site, site-deploy. -> [Help 1]

• 原因：命令没有被终端有效的识别到
• 解决方法：

1、打开 idea 设置

2、切换为：C:\Windows\system32\cmd.exe

3、或者也可以在默认终端（powershell.exe）运行命令的时候加上引号，如：

mvn clean install '-Dmaven.skip.test=true'