We are in the process of standardizing our default Eclipse configuration (styles, settings, dictionary, formatting, run configurations, etc.) for our developers.
However, for Java compiler errors and warnings preferences, there does not seem to be any way to export/import settings. Is there another way to do this?
The ideal way to share settings within the team (for use within the IDE) is to use project specific settings. The project specific settings become part of the project and go into source control repository, hence every team member gets them for free.
Most of the settings you mention in the question can be configured per project.