Error updating group repository metadata maven unwritten dating rules
This screenshot is immediately after restarting Eclipse, you can see that at bottom right corner it showing as Updating index, which is the proof that it's now downloading index file.If you double click there it will open the view which we have shown in next screenshot, there you can see that it downloads dependencies form Maven central remote repository.
to add JAR file related to Hibernate or Spring Framework you will type hibernate or spring framework in given search bar.
You can see that Eclipse is updating indexes and it's doing it from Maven central repository,
If you had configured internal nexus repository then it will download from there.
Don't be fool with that error this was just because we are not adding any dependency explicitly.
Main problem here is that Eclipse is not able to search for dependencies when you enter some keyword in search box.