M2e not finding missing repository - m2e eclipse plugin

问题

When I hover over a package that is not found within Eclipse and click 'Search repositories', the dependency I'm searching for is not found. The dependency exists on the official maven repository : http://search.maven.org/remotecontent?filepath=javax/portlet/portlet-api/2.0-r12/portlet-api-2.0-r12.pom

Do I need to configure m2e to search the maven repository ?

回答1:

Try to update your repository index in the Maven Repositories View.

1. Open the View with: Windows -> Show View -> Others -> Maven -> Maven Repositories View
2. Start Rebuild Index and/or update Index from the context menu of the Central Repository

This (long running) task is normally done on startup (Windows -> Preferences -> Maven ->Download Repository Index updates on startup) but maybe it is disabled to get a better eclipse startup performance.

来源：https://stackoverflow.com/questions/10122483/m2e-not-finding-missing-repository-m2e-eclipse-plugin