HttpUrlConnection returns -1 状态码

HttpUrlConnection returns -1 status code

我无法连接到我的服务器。以下代码 returns -1 作为响应代码,null 作为响应消息。

  protected Boolean doInBackground(MyTaskParams... params) {
    URL url = null;
    String load = params[0].jobj.toString();
    try {
        url = new URL(params[0].serverUrl);
    } catch (MalformedURLException e) {
        e.printStackTrace();
    }
    try {
        HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();

        urlConnection.setConnectTimeout(3000);
        urlConnection.setReadTimeout(3000);
        urlConnection.setRequestMethod("POST");
        urlConnection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
        urlConnection.setChunkedStreamingMode(0);
        urlConnection.setDoOutput(true);
        urlConnection.setDoInput(true);
        urlConnection.connect();

        OutputStreamWriter osw = new OutputStreamWriter(urlConnection.getOutputStream());
        osw.write(load);
        osw.flush();
        osw.close();

        if(urlConnection.getResponseCode()==200 && urlConnection.getResponseMessage().contains("true") ) return true;
        else return false;
    } catch (IOException e) {
        e.printStackTrace();
    }
    return false;
}

调试时 url 和正文内容(加载到代码中)是正确的。当我尝试使用这些参数与 Fiddler 连接服务器时,它运行良好,我得到 200 状态代码。你知道哪里出了问题吗?

我将 jData 对象作为 jobj 传递:

        JSONObject User=new JSONObject();
        JSONObject Mobile=new JSONObject();
        JSONObject jData=new JSONObject();
        try {
            User.put ("UserLogin", "test");
            User.put ("UserPassword", "test");
            Mobile.put ("MobileIDD", IDD);
            Mobile.put("MobileToken", token);
            jData.put("Mobile", Mobile);
            jData.put("User", User);
        } catch (JSONException e) {
            e.printStackTrace();
        }

@编辑 System.setProperty("http.keepAlive", "false") 的解决方案没有帮助。

我解决了这个问题。它在这一行:

if(urlConnection.getResponseCode()==200 && urlConnection.getResponseMessage().contains("true") ) return true;

当我把它改成:

int code = urlConnection.getResponseCode();
if (code==200.....)

它开始工作了。