the front and rear ends are separated, the front end uses vue, and the back end uses springboot project to start the port is inconsistent. 
 allows cross-domain configuration in the springboot project, but it does not work 
@ Configuration
public class CorsConfig implements WebMvcConfigurer { configuration class of
springboot
@Override
public void addCorsMappings(CorsRegistry registry) {
    registry.addMapping("/**")
            .allowedOrigins("*")
            .allowCredentials(true)
            .allowedMethods("*")
            .maxAge(3600);
}}
did you guys write something wrong
