# 设置headers 报错Request header field Content-Type is not allowed by Access-Control-Allow-Headers
我要自定义一些参数放在headers里面，试了好多方法都不行
需要在后端设置:
// TODO 支持跨域访问
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Credentials", "true");
response.setHeader("Access-Control-Allow-Methods", "*");
response.setHeader("Access-Control-Allow-Headers", "Content-Type,Access-Token");//这里“Access-Token”是我要传到后台的内容key
response.setHeader("Access-Control-Expose-Headers", "*");
if (request.getMethod().equals("OPTIONS")) {
HttpUtil.setResponse(response, HttpStatus.OK.value(), null);
return;
}
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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");