http请求获取301重定向的Location值

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 == 301) {
        org.apache.http.Header locationHeader = response.getFirstHeader("Location");
        location = locationHeader.getValue();
      }
    } catch (Exception e) {
      
      e.printStackTrace();
    }
    
    return location;
  }