./apache-maven-3.5.2/conf/settings.xml
<mirror>
<id>nexus-163</id>
<mirrorOf>*</mirrorOf>
<name>Nexus 163</name>
<url>http://mirrors.163.com/maven/repository/maven-public/</url>
</mirror>
pom.xml
<repositories>
<repository>
<id>nexus-163</id>
<name>Nexus 163</name>
<url>http://mirrors.163.com/maven/repository/maven-public/</url>
<layout>default</layout>
<snapshots>
<enabled>false</enabled>
</snapshots>
<releases>
<enabled>true</enabled>
</releases>
</repository>
</repositories>
<pluginRepositories>
<pluginRepository>
<id>nexus-163</id>
<name>Nexus 163</name>
<url>http://mirrors.163.com/maven/repository/maven-public/</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
<releases>
<enabled>true</enabled>
</releases>
</pluginRepository>
</pluginRepositories>
执行maven update更新一下即可。
原文:https://www.cnblogs.com/meilong/p/Maven-Speed-Up.html