点击download
选择红色方框标注的链接下载即可
找到apache-maven-3.9.9-bin\apache-maven-3.9.9\conf下的settings.xml
mirror节点配置仓库jar包下载地址
<mirror>
<id>alimaven</id>
<name>aliyun maven</name>
<url>http://maven.aliyun.com/nexus/content/groups/public/</url>
<mirrorOf>central</mirrorOf>
</mirror>
<localRepository>E:\repo</localRepository>
localRepository是自己本地仓库的jar包路径