出现的错误为：
Multiple annotations found at this line:
- Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:3.1:testCompile (execution: default-testCompile, phase: test-compile)
- Plugin execution not covered by lifecycle configuration: org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (execution: default-compile, phase: compile)
- CoreException: Could not get the value for parameter compilerId for plugin execution default-compile: PluginResolutionException: Plugin org.apache.maven.plugins:maven-compiler-plugin:3.1 or one of its dependencies could not be
resolved: The repository system is offline but the artifact com.google.collections:google-collections:jar:1.0 is not available in the local repository.
- CoreException: Could not get the value for parameter compilerId for plugin execution default-testCompile: PluginResolutionException: Plugin org.apache.maven.plugins:maven-compiler-plugin:3.1 or one of its dependencies could not be
resolved: The repository system is offline but the artifact com.google.collections:google-collections:jar:1.0 is not available in the local repository.
解决方案具体看这篇：https://www.codeprj.com/blog/9e35961.html
就是强制更新一下就可以了