SpringBoot启动报错：Error creating bean with name 'servletEndpointRegistrar' defined in class path resource

2021-11-24 15:25:26.381 ERROR 11040 --- $$restartedMain$$ o.s.b.w.e.t.TomcatStarter : Error starting Tomcat context. Exception: org.springframework.beans.factory.BeanCreationException. Message: Error creating bean with name 'servletEndpointRegistrar' defined in class path resource 。

往下翻会看到一句：

Error creating bean with name 'servletEndpointRegistrar' defined in class path resource

再往下仔细查找，有下面的报错：

Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: org.postgresql.Driver

很明显，缺少驱动，检查pom文件，没发现问题。

解决问题的操作：

清空缓存重启IDEA

输入maven命令:mvn idea:idea