跨域问题
报错信息为：Failed to load http://192.168.30.119: Request header field language is not allowed by Access-Control-Allow-Headers in preflight response.

原因：前台发送的请求体包含了没有允许的Header

如何解决问题：在请求体加入允许的Header类型

原有代码： response.setHeader(“Access-Control-Allow-Headers”, “x-requested-with,Authorization”);
修改后： response.setHeader(“Access-Control-Allow-Headers”, "x-requested-with,Authorization，language");

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