项目无法clean

[ERROR] Plugin org.springframework.boot:spring-boot-maven-plugin:2.1.3.RELEASE or one of its dependencies could not be resolved: Cannot access alimaven (http://maven.aliyun.com/nexus/content/repositories/central/) in offline mode and the artifact org.springframework.boot:spring-boot-maven-plugin:jar:2.1.3.RELEASE has not been downloaded from it before. -> [Help 1]
[ERROR] 
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException


解决 去掉work offline的勾选选项，只勾选本地仓库路径

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maven 解决Cannot access alimaven (http://maven.aliyun.com/nexus/content/repositori