这对我来说就像魅力：
public int uploadFile(String sourceFileUri) {
String fileName=sourceFileUri;
HttpURLConnection conn = null;
DataOutputStream dos = null;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "------hellojosh";
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024 * 1024;
File sourceFile = new File(fileName);
Log.e("joshtag", "Uploading: sourcefileURI, "+fileName);
if (!sourceFile.isFile()) {
Log.e("uploadFile", "Source File not exist :"+appSingleton.getInstance().photouri);//FullPath);
runOnUiThread(new Runnable() {
public void run() {
//messageText.setText("Source File not exist :"
}
});
return 0; //RETURN #1
}
else{
try{
FileInputStream fileInputStream = new FileInputStream(sourceFile);
URL url = new URL(upLoadServerUri);
Log.v("joshtag",url.toString());
// Open a HTTP connection to the URL
conn = (HttpURLConnection) url.openConnection();
conn.setDoInput(true); // Allow Inputs
conn.setDoOutput(true); // Allow Outputs
conn.setUseCaches(false); // Don't use a Cached Copy s
conn.setRequestMethod("POST");
conn.setRequestProperty("Connection", "Keep-Alive");
conn.setRequestProperty("ENCTYPE", "multipart/form-data");
conn.setRequestProperty("Content-Type", "multipart/form-data;boundary=" + boundary);
conn.setRequestProperty("file", fileName);
conn.setRequestProperty("user", user_id));
dos = new DataOutputStream(conn.getOutputStream());
//ADD Some -F Form parameters, helping method
//... is declared down below
addFormField(dos, "someParameter", "someValue");
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\"file\";filename=\"" + fileName + "\"" + lineEnd);
dos.writeBytes(lineEnd);
// create a buffer of maximum size
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// read file and write it into form...
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
while (bytesRead > 0) {
dos.write(buffer, 0, bufferSize);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
Log.i("joshtag","->");
}
// send multipart form data necesssary after file data...
dos.writeBytes(lineEnd);
dos.writeBytes(twoHyphens + boundary + twoHyphens + lineEnd);
// Responses from the server (code and message)
serverResponseCode = conn.getResponseCode();
String serverResponseMessage = conn.getResponseMessage().toString();
Log.i("joshtag", "HTTP Response is : " + serverResponseMessage + ": " + serverResponseCode);
// ------------------ read the SERVER RESPONSE
DataInputStream inStream;
try {
inStream = new DataInputStream(conn.getInputStream());
String str;
while ((str = inStream.readLine()) != null) {
Log.e("joshtag", "SOF Server Response" + str);
}
inStream.close();
}
catch (IOException ioex) {
Log.e("joshtag", "SOF error: " + ioex.getMessage(), ioex);
}
//close the streams //
fileInputStream.close();
dos.flush();
dos.close();
if(serverResponseCode == 200){
//Do something
}//END IF Response code 200
dialog.dismiss();
}//END TRY - FILE READ
catch (MalformedURLException ex) {
ex.printStackTrace();
Log.e("joshtag", "UL error: " + ex.getMessage(), ex);
} //CATCH - URL Exception
catch (Exception e) {
e.printStackTrace();
Log.e("Upload file to server Exception", "Exception : "+ e.getMessage(), e);
} //
return serverResponseCode; //after try
}//END ELSE, if file exists.
}
public static String lineEnd = "\r\n";
public static String twoHyphens = "--";
public static String boundary = "------------------------afb19f4aeefb356c";
public static void addFormField(DataOutputStream dos, String parameter, String value){
try {
dos.writeBytes(twoHyphens + boundary + lineEnd);
dos.writeBytes("Content-Disposition: form-data; name=\""+parameter+"\"" + lineEnd);
dos.writeBytes(lineEnd);
dos.writeBytes(value);
dos.writeBytes(lineEnd);
}
catch(Exception e){
}
}
更新：如果您需要与文件一起发送参数，请使用：
conn.setRequestProperty("someParameter","someValue")
//or
addFormField(DataOutputStream dos, String parameter, String value)
...如上面的代码所示。如果您不完全了解您尝试连接的服务器，则其中一个应该可以工作。