HttpClient的POST请求返回302解决

HttpClient请求POST提示302，而且返回的response中的Localtion是我访问时使用的URL，
例如：我使用的URL是https://bbs.csdn.net?client_id=10333&user=test，
localtion中也是这个https://bbs.csdn.net?client_id=10333&user=test

我试了直接使用curl可以返回json
我的post方法：

public static StringBuilder post(String url, Object data, String encoding) {
 log.info("HttpClient post start => "+url);
 CloseableHttpResponse response = null;
 HttpPost httpPost = null;
 HttpHost httpHost = null;
 StringBuilder responseEntity = null;
 String strings = "";

     URL _url = new URL(url);

     httpPost = new HttpPost(url);

     httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded");

     if(!Stringer.isNullOrEmpty(data)){

  log.debug("HttpClient post url => "+url+", data:"+JSON.toJSONString(data));

  if (data instanceof Map) {
      // Map方式传参处理
      Map params = (Map) data;

      List nvps = new ArrayList();
      if (!Stringer.isNullOrEmpty(data)) {
   Set keySet = params.keySet();
   for (String key : keySet) {
nvps.add(new BasicNamevaluePair(key, params.get(key)));
   }
      }
      httpPost.setEntity(new UrlEncodedFormEntity(nvps, encoding));

  } else if(data instanceof String){
      // String方式传参处理
      strings = (String)data;
      strings = Stringer.nullToEmpty(strings);
      ByteArrayEntity reqEntity = new ByteArrayEntity(strings.getBytes(encoding));
      reqEntity.setContentEncoding(encoding);
      httpPost.setEntity(reqEntity);
  }
     }

     httpPost.setConfig(defaultRequestConfig);

     httpHost = new HttpHost(_url.getHost(),_url.getPort());  
     response = httpClient.execute(httpHost,httpPost);

     if(!Stringer.isNullOrEmpty(response)){
  log.info("2--HttpClient response  => "+response);
  log.info("3--HttpClient StatusCode  => "+response.getStatusLine().getStatusCode());
  
  String locationUrl=response.getLastHeader("location").getValue();
  log.info("HttpClient locationUrl  => "+locationUrl);
  log.info("4--HttpClient StatusCode  => "+response.getStatusLine().getStatusCode());

  if (response.getStatusLine().getStatusCode() == 302) {
      Header header = response.getFirstHeader("location"); // 跳转的目标地址是在 HTTP-HEAD上
      String newuri = header.getValue(); // 这就是跳转后的地址，再向这个地址发出新申请
      System.out.println(newuri);

      httpPost = new HttpPost(newuri);
      httpPost.setHeader("Content-Type", "application/x-www-form-urlencoded");


      response = httpClient.execute(httpHost,httpPost);
      int code = response.getStatusLine().getStatusCode();
      locationUrl=response.getLastHeader("location").getValue();
      log.info("5--HttpClient new Code  => "+code);
      log.info("6--HttpClient locationUrl  => "+locationUrl);
  }
  responseEntity = new StringBuilder();
  responseEntity.append(EntityUtils.toString(response.getEntity(), encoding));
  return responseEntity;
     }

 return null;
    }