Android post contains data request methods. The transmitted data formats include json, map, and androidjson.

Android post contains data request methods. The transmitted data formats include json, map, and androidjson.

As follows:

Public static String httpPost (String url, String json ){
Try {
URL u = new URL (url );
HttpURLConnection httpURLConnection = (HttpURLConnection) u. openConnection ();
HttpURLConnection. setConnectTimeout (TIMEOUT );
HttpURLConnection. setDoInput (true );
HttpURLConnection. setDoOutput (true );
HttpURLConnection. setRequestMethod ("POST ");
HttpURLConnection. setUseCaches (false );

HttpURLConnection. setRequestProperty ("Content-Type ",
"Application/json ");

HttpURLConnection. setRequestProperty ("Content-Length ",
String. valueOf (json. getBytes (). length ));

OutputStream outputStream = httpURLConnection. getOutputStream ();
OutputStream. write (json. getBytes ());

Int response = httpURLConnection. getResponseCode ();
If (response = HttpURLConnection. HTTP_ OK ){
InputStream inptStream = httpURLConnection. getInputStream ();
Return dealResponseResult (inptStream );
}
} Catch (Exception e ){
E. printStackTrace ();
}
Return "";
}

Private static String dealResponseResult (InputStream inputStream ){
String resultData = null;
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream ();
Byte [] data = new byte [1024];
Int len = 0;
Try {
While (len = inputStream. read (data ))! =-1 ){
ByteArrayOutputStream. write (data, 0, len );
}
} Catch (IOException e ){
E. printStackTrace ();
}
ResultData = new String (byteArrayOutputStream. toByteArray ());
Return resultData;
}

If the transmitted value is not in json format, but map, you can use the following format:

Public static String httpPost (String url, Map <String, String> params ){
Byte [] data = getRequestData (params, "UTF-8"). toString (). getBytes ();
Try {
URL u = new URL (url );
HttpURLConnection httpURLConnection = (HttpURLConnection) u. openConnection ();
HttpURLConnection. setConnectTimeout (TIMEOUT );
HttpURLConnection. setDoInput (true );
HttpURLConnection. setDoOutput (true );
HttpURLConnection. setRequestMethod ("POST ");
HttpURLConnection. setUseCaches (false );

HttpURLConnection. setRequestProperty ("Content-Type ",
"Application/x-www-form-urlencoded ");

HttpURLConnection. setRequestProperty ("Content-Length ",
String. valueOf (data. length ));

OutputStream outputStream = httpURLConnection. getOutputStream ();
OutputStream. write (data );

Int response = httpURLConnection. getResponseCode ();
If (response = HttpURLConnection. HTTP_ OK ){
InputStream inptStream = httpURLConnection. getInputStream ();
Return dealResponseResult (inptStream );
}
} Catch (Exception e ){
E. printStackTrace ();
}
Return "";
}

Private static StringBuffer getRequestData (Map <String, String> params,
String encode ){
StringBuffer stringBuffer = new StringBuffer ();
Try {
For (Map. Entry <String, String> entry: params. entrySet ()){
StringBuffer. append (entry. getKey ())
. Append ("= ")
. Append (URLEncoder. encode (entry. getValue (), encode ))
. Append ("&");
}
StringBuffer. deleteCharAt (stringBuffer. length ()-1); // remove the last "&"
} Catch (Exception e ){
E. printStackTrace ();
}
Return stringBuffer;
}