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跨域访问时很多需求,所以 SpringBoot 的跨域解决也是必须的。

Access to XMLHttpRequest at 'http://127.0.0.1:18888/XXXX' from origin 'http://127.0.0.1:8080' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
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