Java從HTTPS html格式下載文件

Question

我必須從網站下載文件。這是一個普通的html表單，我通常從html表單下載幾個文件。但是，這是一個只允許通過HTTPS訪問的網站。

我有一個很棒的程序，我不能使用Apache Commons HttpClient，因爲我無法從excel和pdfs文件以外的任何地方下載任何內容。得到Eclipse非常困難。因此，我使用HttpURLConnection（我也試過HttpsURLConnection），但是這種方式我甚至無法連接到站點，所以發送參數到窗體並下載文件是不可能的。

請問有人可以幫我嗎？

感謝和問候。

Answer 1

那麼你應該使用HttpsURLConnection並驗證請求。

看進到這裏：Tring to connect using HTTPS: Server redirected too many times

編輯

應該是這樣的代碼：

private void SendRequest(string url, string data){ 

    Stream dataStream = null; 
    WebResponse response = null; 

    try 
    { 
     string requestXml = Sendingxml.ToString(); 

     HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); 
     request.Method = "POST"; 

     ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(AcceptAllCertifications); 

     string formParams = string.Format("data={0}", data); 

     byte[] byteArray = Encoding.UTF8.GetBytes(formParams); 
     request.ContentType = "application/x-www-form-urlencoded"; 
     encoding='utf-8'"; 
     request.ContentLength = byteArray.Length; 

     dataStream = request.GetRequestStream(); 
     dataStream.Write(byteArray, 0, byteArray.Length); 
     dataStream.Close(); 

     response = request.GetResponse(); 
     dataStream = response.GetResponseStream(); 

     string responseFromServer = ""; 
     using (StreamReader reader = new StreamReader(dataStream)) 
     { 
      responseFromServer = reader.ReadToEnd(); 
     } 

     return responseFromServer; 
    } 
    catch (Exception e) 
    { 
     throw new CommunicationFailure(); 
    } 
    finally 
    { 
     if (dataStream != null) 
      dataStream.Close(); 
     if (response != null) 
      response.Close(); 
    } 
} 


private bool AcceptAllCertifications(object sender, System.Security.Cryptography.X509Certificates.X509Certificate certification, System.Security.Cryptography.X509Certificates.X509Chain chain, System.Net.Security.SslPolicyErrors sslPolicyErrors) 
    { 
     return true; 
    }