springboot-cors.java

@Configuration
@EnableWebMvc
public class WebConfig implements WebMvcConfigurer {
    @Override
    public void addCorsMappings(CorsRegistry registry) {
        registry.addMapping("api/v1/**").allowedOrigins(
            "http://127.0.0.1:8081",
            "http://localhost:8081"
        )
    }
}