Access to XMLHttpRequest at 'http://192.168.0.144:8762/ctginms_main2019/api/traceRoute/getMapData' from origin 'http://localhost:8080' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values 'http://localhost:8080, http://localhost:8080', but only one is allowed.

具体错误如下

后台接口可以接收到前台的请求，并且响应，但是前台收不到响应

前台 vue 后台 jHipster

用postman和swagger可以正常获取数据

错误产生原因：在zuul和及jHipster 中都处理了跨域请求，所以导致重复

解决方法：干掉jHipster中的处理跨域请求的代码即可

下面代码就是jHipster 中处理跨域请求的，注释掉即可

@Bean
    public CorsFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        CorsConfiguration config = jHipsterProperties.getCors();
        if (config.getAllowedOrigins() != null && !config.getAllowedOrigins().isEmpty()) {
            log.debug("Registering CORS filter");
            source.registerCorsConfiguration("/api/**", config);
            source.registerCorsConfiguration("/v2/api-docs", config);
        }
        return new CorsFilter(source);
    }