spring mvc报错：No more pattern data allowed after {*...} or ** pattern element

具体报错：

***************************
APPLICATION FAILED TO START
***************************

Description:

Invalid mapping pattern detected: /**/*.css
^
No more pattern data allowed after {*...} or ** pattern element

Action:

Fix this pattern in your application or switch to the legacy parser implementation with `spring.mvc.pathpattern.matching-strategy=ant_path_matcher`.


Process finished with exit code 0

原因：

错误是路径通配问题，查找发现是spring升级到5.3之后路径通配发生了变化，官方给出的解释是“In Spring MVC, the path was previously analyzed by AntPathMatcher, but it was changed to use PathPatternParser introduced in WebFlux from Spring 5.3.0.”。

解决：

具体解决是把/**/*.css 改为 /*/*.css，项目中可能涉及多个文件，都要改。