Android AsyncHttpClient向服务器发送HTTP POST请求

我正在尝试向服务器发送HTTP POST请求。 我的服务器接受这样的卷曲：

curl -i -H "Content-Type: application/json" -H "Accept: application/json" -X POST -d "{\"City\":\"Lodz\", \"FirstName\":\"Patryk\"}" http://127.0.0.1:8000/addemployees

 AsyncHttpClient httpClient = new AsyncHttpClient();
 httpClient.addHeader("Accept", "application/json");
 RequestParams jsonParams = new RequestParams();
 jsonParams.put("City", city);
 jsonParams.put("FirstName", city);
 Log.i("requestParams: ", jsonParams.toString());
 httpClient.post("http://myComputerIP:8000/addemployees", jsonParams, new JsonHttpResponseHandler() {

 @Override
 public void onSuccess(int statusCode, Header[] headers, JSONObject obj) {
      String jsonResponse = obj.toString();
      Log.i("TAG", "onSuccess: " + jsonResponse);
      }

 @Override
 public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject errorResponse) {
      Log.e("TAG", "onFailure: " + errorResponse);
}

我还尝试使用Android发送HTTP POST请求。 我的代码如下所示：

curl -i -H "Content-Type: application/json" -H "Accept: application/json" -X POST -d "{\"City\":\"Lodz\", \"FirstName\":\"Patryk\"}" http://127.0.0.1:8000/addemployees

 AsyncHttpClient httpClient = new AsyncHttpClient();
 httpClient.addHeader("Accept", "application/json");
 RequestParams jsonParams = new RequestParams();
 jsonParams.put("City", city);
 jsonParams.put("FirstName", city);
 Log.i("requestParams: ", jsonParams.toString());
 httpClient.post("http://myComputerIP:8000/addemployees", jsonParams, new JsonHttpResponseHandler() {

 @Override
 public void onSuccess(int statusCode, Header[] headers, JSONObject obj) {
      String jsonResponse = obj.toString();
      Log.i("TAG", "onSuccess: " + jsonResponse);
      }

 @Override
 public void onFailure(int statusCode, Header[] headers, Throwable throwable, JSONObject errorResponse) {
      Log.e("TAG", "onFailure: " + errorResponse);
}

但是，我的Android代码中出现了一些错误，因为我遇到了以下错误：

TAG: onFailure: {"message":"Internal Server Error"}

---

我试过几种解决办法，但都不管用。我应该如何改变它？谢谢

您应该以JSON格式发送数据。为此，您需要向

POST

方法传递一个

StringEntity

对象，该对象包含已格式化的JSON字符串，而不是

RequestParams

JSONObject json = new JSONObject();
json.put("City", city);
json.put("FirstName", city);
StringEntity entity = new StringEntity(json.toString());

---

您应该以JSON格式发送数据。为此，您需要向

POST

方法传递一个

StringEntity

对象，该对象包含已格式化的JSON字符串，而不是

RequestParams

JSONObject json = new JSONObject();
json.put("City", city);
json.put("FirstName", city);
StringEntity entity = new StringEntity(json.toString());