The blocked mirror for repositories problem is due to Maven 3 8.1 from the beginning, the HTTP connection is blocked in the configuration file by default
idea has the following solutions to solve this problem
1. Replace the use of Maven for version 3.6.3 https://dlcdn.apache.org/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.zip

2. When idea loads external configuration files, it will load the settings.xml in the \plugins\maven\lib\maven3\conf folder in the installation directory first, comment the file

<mirror>
      <id>maven-default-http-blocker</id>
      <mirrorOf>external:http:*</mirrorOf>
      <name>Pseudo repository to mirror external repositories initially using HTTP.</name>
      <url>http://0.0.0.0/</url>
      <blocked>true</blocked>
    </mirror>

It will take effect