目录
[一、Access to XMLHttpRequest at 'http://127.0.0.1:8088/api/hello' from origin 'http://localhost:5173' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.](#一、Access to XMLHttpRequest at 'http://127.0.0.1:8088/api/hello' from origin 'http://localhost:5173' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.)
一、Access to XMLHttpRequest at 'http://127.0.0.1:8088/api/hello' from origin 'http://localhost:5173' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
报错：
原因：来自一个IP端口的页面（前端项目），要访问另一个IP端口的资源（springboot请求接口），会产生跨域访问。跨域问题导致的。
解决：
二、报错@vue/compiler-sfc <script> and <script setup> must have the same language type.
原因：在Uniapp + Vue2 项目升级到 Vue3+Ts时，如果<script>使用了setup语法糖，则无法用export default 导出 App.vue中的 globalData全局变量，其他页面就无法通过getApp()方法来获取globalData已实现好的方法和全局变量。
解决：保持一致，
ok，重启vue，就可以了。