我的maven setting.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
  <localRepository>${user.home}/.m2/repository</localRepository>
  <pluginGroups>
  </pluginGroups>
  <proxies>
  </proxies>
  <servers>
  </servers>
  <mirrors>
    <mirror>
      <id>alimaven</id>
      <mirrorOf>central</mirrorOf>
      <name>aliyun maven</name>
      <url>https://maven.aliyun.com/nexus/content/repositories/central/</url>
    </mirror>
    <mirror>
        <id>central</id>
        <name>Maven Repository Switchboard</name>
        <url>https://repo1.maven.org/maven2/</url>
        <mirrorOf>central</mirrorOf>
    </mirror>
  </mirrors>
  <profiles>
  </profiles>
</settings>

reference:

• 快照版本和发布版本的区别
• maven tutorial