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

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

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

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原文地址：https://www.cnblogs.com/cheng2839/p/14309537.html