我正在使用HttpURLConnection将文件上传到服务器，但是我不知道如何添加其他参数来将String数据与文件一起发送。
这是我用来上传文件的代码。
public String sendFileToServer(String filename, String targetUrl) {
String response = "error";
Log.e("Image filename", filename);
Log.e("url", targetUrl);
HttpURLConnection connection = null;
DataOutputStream outputStream = null;
// DataInputStream inputStream = null;
String pathToOurFile = filename;
String urlServer = targetUrl;
String lineEnd = "\r\n";
String twoHyphens = "--";
String boundary = "*****";
DateFormat df = new SimpleDateFormat("yyyy_MM_dd_HH:mm:ss");
int bytesRead, bytesAvailable, bufferSize;
byte[] buffer;
int maxBufferSize = 1 * 1024;
try {
FileInputStream fileInputStream = new FileInputStream(new File(
pathToOurFile));
URL url = new URL(urlServer);
connection = (HttpURLConnection) url.openConnection();
// Allow Inputs & Outputs
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
connection.setChunkedStreamingMode(1024);
// Enable POST method
connection.setRequestMethod("POST");
connection.setRequestProperty("Connection", "Keep-Alive");
connection.setRequestProperty("Content-Type",
"multipart/form-data;boundary=" + boundary);
outputStream = new DataOutputStream(connection.getOutputStream());
outputStream.writeBytes(twoHyphens + boundary + lineEnd);
String connstr = null;
connstr = "Content-Disposition: form-data; name=\"uploadedfile\";filename=\""
+ pathToOurFile + "\"" + lineEnd;
Log.i("Connstr", connstr);
outputStream.writeBytes(connstr);
outputStream.writeBytes(lineEnd);
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
buffer = new byte[bufferSize];
// Read file
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
Log.e("Image length", bytesAvailable + "");
try {
while (bytesRead > 0) {
try {
outputStream.write(buffer, 0, bufferSize);
} catch (OutOfMemoryError e) {
e.printStackTrace();
response = "outofmemoryerror";
return response;
}
bytesAvailable = fileInputStream.available();
bufferSize = Math.min(bytesAvailable, maxBufferSize);
bytesRead = fileInputStream.read(buffer, 0, bufferSize);
}
} catch (Exception e) {
e.printStackTrace();
response = "error";
return response;
}
outputStream.writeBytes(lineEnd);
outputStream.writeBytes(twoHyphens + boundary + twoHyphens
+ lineEnd);
// Responses from the server (code and message)
int serverResponseCode = connection.getResponseCode();
String serverResponseMessage = connection.getResponseMessage();
Log.i("Server Response Code ", "" + serverResponseCode);
Log.i("Server Response Message", serverResponseMessage);
if (serverResponseCode == 200) {
response = "true";
}
String CDate = null;
Date serverTime = new Date(connection.getDate());
try {
CDate = df.format(serverTime);
} catch (Exception e) {
e.printStackTrace();
Log.e("Date Exception", e.getMessage() + " Parse Exception");
}
Log.i("Server Response Time", CDate + "");
filename = CDate
+ filename.substring(filename.lastIndexOf("."),
filename.length());
Log.i("File Name in Server : ", filename);
fileInputStream.close();
outputStream.flush();
outputStream.close();
outputStream = null;
} catch (Exception ex) {
// Exception handling
response = "error";
Log.e("Send file Exception", ex.getMessage() + "");
ex.printStackTrace();
}
return response;
}
我以前使用过Volley，但是当文件很大时它无法上传，我必须上传最大20 MB的视频文件，所以如果您有更好的解决方案，请告诉我。
我正在Service中使用此代码，因此即使用户关闭了应用程序，上传也应继续。