spring cloud @CrossOrigin 註解 報錯 has been blocked by CORS policy: The 'Access-Control-Allow-Origin'

瀏覽器訪問接口失敗,不返回任何狀態碼,查看後發現,把方法的@CrossOrigin註解掉就可以了 

 has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed.