问题：Failed to execute goal org.apache.maven.plugins:maven-archetype-plugin:3.1.2:generate (default-cli) on project standalone-pom: Execution default-cli of goal org.apache.maven.plugins:maven-archetype-plugin:3.1.2:generate failed: Plugin org.apache.maven.plugins:maven-archetype-plugin:RELEASE or one of its dependencies could not be resolved: Failed to collect dependencies at org.apache.maven.plugins:maven-archetype-plugin:jar:3.1.2 -> org.apache.maven.archetype:archetype-common:jar:3.1.2 -> org.apache.maven.shared:maven-invoker:jar:3.0.1 -> org.apache.maven.shared:maven-shared-utils:jar:3.2.1

我第一次新建Maven文件的时候，发现没有scr文件夹，并且文件没有构建成功，我就很奇怪，在网上搜索了一个多小时的解决办法，终于解决了。

问题截图：

解决办法：把这个文件夹删掉！然后重新建项目，就可以了！