No @RequestMapping annotation

I ran into this problem in the afternoon. It’s very strange. The good @RequestMapping annotation is gone. The good springweb jar package is damaged or conflicted, which leads to this problem. The solution is very rough and simple. Maven’s jar package library puts org\springframework Delete all the following jar packages, re-run the pom file to download, and finally, whether it is a jar package version conflict or damage problem, all problems are solved.