在gateway專案啟動類中加入以下程式碼

@Bean
public CorsFilter corsFilter() {
    final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    final CorsConfiguration config = new CorsConfiguration();
    config.setAllowCredentials(true);
    config.addAllowedOrigin("*");
    config.addAllowedHeader("*"
 
);
    config.addAllowedMethod("*");
    config.setMaxAge(18000L);
    source.registerCorsConfiguration("/**", config);
    return new CorsFilter(source);
}