Spring 4.0.0 backward compatibility
问题 I've searched and couldn't find anything to suggest that Spring 4.0.0 is not fully backward compatible with Spring 3.x. Is that indeed the case? 回答1: There are few API they have removed in the new version. You would not have any surprise changes with the new version, there could be slight changes in the API. But, you have to watch the deprecated APIs which will be the candidate for removal in the forthcoming versions. Look at this document , they have included few backward compatibility