安装Maven现象：解压到安装目录之后 配置完环境变量之后
cmd运行 mvn -v 报错
No goals have been specified for this build. You must specify a valid lifecycle phase or a goal in the format : or :[:]:. Available lifecycle phases are: validate, initialize, generate-sources, process-sources, generate-resources, process-resources, compile, process-classes, generate-test-sources, process-test-sources, generate-test-resources, process-test-resources, test-compile, process-test-classes, test, prepare-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]
解决方法
找到maven安装路径下lib\maven-model-builder-x.x.x.jar打开，编辑pom.xml文件，在第一个build后添加compile
前置条件
1、java环境变量配置成功
2、mven环境变量配置好
原文：https://blog.csdn.net/m0_37596148/article/details/82917647
