How to Publish Java Components to Maven Central: Navigating the New Central Portal

The cover image is AI, but my work is 2 days worth. Publishing a Java library to Maven Central has historically been a rite of passage for Java developers. With recent updates to Sonatype’s infrastructure — specifically the introduction of the new Central Portal — the process has changed. Maven now supports two primary workflows: the Standard Maven Deploy Command and the Central Portal ZIP Upload . Depending on when your namespace was registered, you might be forced to use one over the other. Here is a comprehensive guide to getting your Java project successfully published using both methods. 1. Prerequisites (Mandatory for both methods) Before you build or upload anything, you need to configure your environment, your credentials, and your project’s pom.xml . 1.1 Namespace & Account Portal URL: Go to central.sonatype.com and create an account. Official Namespace: Register your namespace (e.g., io.github.yourusername.project ). Status: Your namespace must show as “Verified” (with a gree