重复设置允许跨域问题

Access to XMLHttpRequest at 'https://beta.xiaoxiaoqiquan.com/acct/transfers?page=1' from origin 'http://localhost:3000' has been blocked by CORS policy: The 'Access-Control-Allow-Origin' header contains multiple values '*, *', but only one is allowed.

如果遇到如上错误，请仔细检查你的代码，是否是如下代码对同一个接口设置了多次

public void enableCORS(Response response) {
        response.header("Access-Control-Allow-Origin", "*");
    }

如果不是，请确认是否是代理如Nginx中已经设置了允许跨域，然后代码中又重复设置了。