从别的地方导入进来的maven项目报:
Description Resource Path Location Type
Java compiler level does not match the version of the installed Java project facet. springboot Unknown Faceted Project Problem (Java Version Mismatch)
可以参考下面的这个博客,可以成功解决。
参考:https://blog.csdn.net/big_bigwolf/article/details/52882603 这个大神的博客。成功解决。