Upload a file using HTTP put in Java

I am writing a desktop app in Java to upload a file to a folder on IIS server using HTTP PUT.

URLConnection urlconnection=null;
  try{
   File file = new File("C:/test.txt");
   URL url = new URL("http://192.168.5.27/Test/test.txt");
   urlconnection = url.openConnection();
   urlconnection.setDoOutput(true);
   urlconnection.setDoInput(true);

   if (urlconnection instanceof HttpURLConnection) {
    try {
     ((HttpURLConnection)urlconnection).setRequestMethod("PUT");
     ((HttpURLConnection)urlconnection).setRequestProperty("Content-type", "text/html");
     ((HttpURLConnection)urlconnection).connect();


    } catch (ProtocolException e) {
     // TODO Auto-generated catch block
     e.printStackTrace();
    }
   }


   BufferedOutputStream bos = new BufferedOutputStream(urlconnection
     .getOutputStream());
   BufferedInputStream bis = new BufferedInputStream(new FileInputStream(
     file));
    int i;
    // read byte by byte until end of stream
    while ((i = bis.read()) >0) {
     bos.write(i);
    }
   System.out.println(((HttpURLConnection)urlconnection).getResponseMessage());
  }
  catch(Exception e)
  {
   e.printStackTrace();
  }
  try {

   InputStream inputStream;
   int responseCode=((HttpURLConnection)urlconnection).getResponseCode();
   if ((responseCode>= 200) &&(responseCode<=202) ) {
    inputStream = ((HttpURLConnection)urlconnection).getInputStream();
    int j;
    while ((j = inputStream.read()) >0) {
     System.out.println(j);
    }

   } else {
    inputStream = ((HttpURLConnection)urlconnection).getErrorStream();
   }
   ((HttpURLConnection)urlconnection).disconnect();

  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.开发者_StackOverflowprintStackTrace();
  }

This program creates an empty file on the destination folder (Test). The contents are not written to the file.

What is wrong with this program?

After you complete the loop where you are writing the BufferedOutputStream, call bos.close(). That flushes the buffered data before closing the stream.

Possible bug: bis.read() can return a valid 0. You'll need to change the while condition to >= 0.