Java 带有com.sun.net.httpserver的CORS

我正在使用此代码，但Chrome不会显示标题，似乎没有添加：

Headers headers = httpExchange.getResponseHeaders();
headers.add("Access-Control-Allow-Headers","x-prototype-version,x-requested-with");
headers.add("Access-Control-Allow-Methods","GET,POST");
headers.add("Access-Control-Allow-Origin","*");

httpExchange.sendResponseHeaders(responseCode, responseBody.length());
OutputStream os = httpExchange.getResponseBody();
os.write(responseBody.getBytes());
os.close();

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我做错了什么？

我也有同样的问题，但我用以下代码解决了我的问题：

httpExchange.getResponseHeaders().add("Access-Control-Allow-Origin", "*");

    if (httpExchange.getRequestMethod().equalsIgnoreCase("OPTIONS")) {
            httpExchange.getResponseHeaders().add("Access-Control-Allow-Methods", "GET, OPTIONS");
            httpExchange.getResponseHeaders().add("Access-Control-Allow-Headers", "Content-Type,Authorization");
            httpExchange.sendResponseHeaders(204, -1);
            return;
        }

// Write here the code to GET requests

这对我有用