HttpClient获取302响应中的Location头信息

public static String getLocationUrl(String url) {
        RequestConfig config = RequestConfig.custom().setConnectTimeout(50000).setConnectionRequestTimeout(10000).setSocketTimeout(50000)
                .setRedirectsEnabled(false).build();//不允许重定向   
        CloseableHttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(config).build(); 
        String location = null;
        int responseCode = 0;
        HttpResponse response;
        try {
            response = httpClient.execute(new HttpGet(url));
            responseCode = response.getStatusLine().getStatusCode();
            if (responseCode == 302) {
                Header locationHeader = response.getFirstHeader("Location");
                location = locationHeader.getValue();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return location;
    }