web服务如何在Java中向GET方法的HttpRequest添加头

Question

为了访问RESTful web服务，我必须为每个GET请求传递一个令牌作为验证的一部分。下面是我用来访问REST api的代码：

public static String httpGet(String urlStr, String[] paramName, String[] paramVal) throws Exception {
        URL url = new URL(urlStr);
        HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
        conn.setRequestMethod("GET");
        conn.setDoOutput(true);
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); 

        OutputStream out = conn.getOutputStream();
        Writer writer = new OutputStreamWriter(out, "UTF-8");
        for (int i = 0; i < paramName.length; i++) {
            writer.write(paramName[i]);
            writer.write("=");
            writer.write(URLEncoder.encode(paramVal[i], "UTF-8"));
            writer.write("&");
        }
        writer.close();
        out.close();

        if (conn.getResponseCode() != 200) {
            System.out.println("Response code: "+conn.getResponseCode());
            throw new IOException(conn.getResponseMessage());
        }

        BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        StringBuilder sb = new StringBuilder();
        String line;
        while ((line = rd.readLine()) != null) {
            sb.append(line);
        }
        rd.close();

        conn.disconnect();
        return sb.toString();
    }

我看不到任何这样的方法来设置为HttpsURLConnection提供的头conn.setHeader()。它应该类似于X-Cookie:token={token}请帮我找到设置标题的方法