How to resolve the issue of being unable to access the Maven Central Repository?

If you are unable to access the Maven Central Repository, you can try the following solutions:

Check your network connection by first ensuring it is working properly. You can try accessing the Maven Central Repository address through a browser to see if it opens correctly.

Check proxy settings: If you are in a network environment with a proxy, you need to check if the correct proxy information is set in your Maven configuration file. You can configure the proxy by editing the ~/.m2/settings.xml file or the /conf/settings.xml file.

Switching mirror sources: Try changing the Maven mirror source, you can use some domestic mirror sources to speed up access. Simply add the following configuration to the settings.xml file.

<mirrors>
    <mirror>
        <id>alimaven</id>
        <mirrorOf>central</mirrorOf>
        <name>aliyun maven</name>
        <url>http://maven.aliyun.com/nexus/content/repositories/central/</url>
    </mirror>
</mirrors>

Sometimes the local Maven cache may encounter issues, in this case you can try clearing all files under the ~/.m2/repository directory and then rebuild the project.

5. Check firewall settings: If you are using a company network, there may be restrictions on external connections due to the firewall. You can try temporarily disabling the firewall or contacting the network administrator for assistance.

By following the methods above, the issue of not being able to access the Maven Central Repository should be resolved. If the problem persists, it is recommended to refer to Maven’s official documentation or seek more professional help.