解決ajax中No 'Access-Control-Allow-Origin' header is present on the requested resource跨域問題
ajax跨域只是屬於瀏覽器「同源策略」中的一部分，若是前端html頁面經過ajax訪問後臺服務時，兩個服務不在同一個域上會存在跨域問題。具體報錯以下：html 解決辦法： 一、若是是spring或SpringBoot項目 在訪問的接口處添加 @CrossOrigin 註解，其中有兩個參數以下，若是不加則表明容許全部ip訪問前端 origins ： 容許可訪問的域列表 maxAge：準備響應前的緩
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- 1. 解決跨域No 'Access-Control-Allow-Origin' header is present on the requested resource.
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- 4. 解決No 'Access-Control-Allow-Origin' header is present on the requested resource.跨域問題
- 5. 解決No 'Access-Control-Allow-Origin' header is present on the requested resource問題
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