axios优化

src/utils/request.js

@@ -104,7 +104,7 @@ service.interceptors.response.use(res => {
     console.log('err' + error)
     let { message } = error;
     if (message == "Network Error") {
-      message = "后端接口连接异常";
+      message = "系统升级中";
     }
     else if (message.includes("timeout")) {
       message = "系统接口请求超时";