maven报错

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-help-plugin:2.2:sy

stem (default-cli) on project standalone-pom: Execution default-cli of goal org.

apache.maven.plugins:maven-help-plugin:2.2:system failed: Plugin org.apache.mave

n.plugins:maven-help-plugin:2.2 or one of its dependencies could not be resolved

: Failed to collect dependencies at org.apache.maven.plugins:maven-help-plugin:j

ar:2.2 -> org.apache.maven:maven-core:jar:2.2.1 -> org.slf4j:jcl-over-slf4j:jar:

1.5.6: Failed to read artifact descriptor for org.slf4j:jcl-over-slf4j:jar:1.5.6

: Could not transfer artifact org.slf4j:jcl-over-slf4j:pom:1.5.6 from/to central

 (https://repo.maven.apache.org/maven2): Connect to repo.maven.apache.org:443 [r

epo.maven.apache.org/23.235.47.215] failed: Connection timed out: connect -> [He

lp 1]

 

 

在执行一遍mvn help:system就好了