Cross domain configuration error: when allowcredentials is true, allowedorigins cannot contain the special value "*“

problem ： stay SpringBoot Configuring cross domain requests in a project , Visit... After starting the project swagger Page error reporting ：

java.lang.IllegalArgumentException: When allowCredentials is true, allowedOrigins cannot contain the special value "*" since that cannot be set on the "Access-Control-Allow-Origin" response header. To allow credentials to a set of origins, list them explicitly or consider using "allowedOriginPatterns" instead.
Income from Baidu , This is a SpringBoot upgrade 2.4.0 Problems after , Blogger SpringBoot Version is 2.6.*, Sure enough, I didn't escape this spell . 

Solution ：

CrosConfig.class Original configuration ：

According to the problem description ：To allow credentials to a set of origins, list them explicitly or consider using "allowedOriginPatterns" instead, We can take allowedOrigins Change it to  allowedOriginPatterns Give it a try , After modification CrosConfig.class The configuration is as follows ：

  Restart the project and access swagger page , The error is solved perfectly .