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Convert JSON String to Java Map

2015-10-16T16:10:00.002+05:30

import org.json.JSONObject;
import org.json.simple.JSONValue;
//........
public static HashMap<String, Object> jsonStringToMap(
String jsonString) throws JSONException {

HashMap<String, Object> map = new HashMap<String, Object>();
try {
JSONObject jObject = new JSONObject(jsonString);
Iterator<?> keys = jObject.keys();

while (keys.hasNext()) {
String key = (String) keys.next();

String value = jObject.getString(key);
map.put(key, value);

}
} catch (Exception e) {

}

return map;
}

Convert JSON Array to Java ArrayList

2015-10-16T16:00:00.001+05:30

import com.google.gson.Gson;

import org.json.simple.JSONValue;

import com.google.gson.JsonArray;

import com.google.gson.JsonElement;

import com.google.gson.JsonParser;

//..........................
public static List<Map<String, Object>> parseJSONStringToArraList(String jSonListString) {

List<Map<String, Object>> parsedList =new ArrayList<Map<String, Object>>();
try {
JsonParser parser = new JsonParser();
JsonElement element = parser.parse(insuranceListString);
JsonArray jasonArray = element.getAsJsonArray();
Gson GSON = new Gson();
List<Map<String, Object>> parsedList = GSON.fromJson(jasonArray,
List.class);

} catch (Exception e) {
e.printStackTrace();
}
parsedList;
}

AES Encrypiton and Decryption using java

2015-10-16T15:54:00.000+05:30

public static void encryptOrDecrypt(String text) throws Exception {
try {

String key = "Bar12345Bar12345"; // 128 bit key

Key aesKey = new SecretKeySpec(key.getBytes(), "AES");

Cipher cipher = Cipher.getInstance("AES");
cipher.init(Cipher.ENCRYPT_MODE, aesKey);
byte[] encrypted = cipher.doFinal(text.getBytes());
System.out.println(new String(encrypted));

cipher.init(Cipher.DECRYPT_MODE, aesKey);
String decrypted = new String(cipher.doFinal(encrypted));
System.out.println(decrypted);
} catch (Exception e) {
e.printStackTrace();
}
}

Convert Java array list to JSON

2015-10-16T15:49:00.000+05:30

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonArray;
//..................
public static String convertArrayListToJson(
List<Map<String, String>> listToConvert) {
String returnString = "";
try {
Gson gson = new GsonBuilder().create();
JsonArray myJsonArray = gson.toJsonTree(listToConvert)
.getAsJsonArray();
returnString = myJsonArray.toString();
} catch (Exception e) {
e.printStackTrace();
}
return returnString;
}
//....................

Convert a Java map to JSON string

2015-10-16T15:44:00.004+05:30

public static String convertMapToJSONString(Map<String, Object> mapToConvert) {
String returnString = "";
try {
StringWriter out = new StringWriter();
JSONValue.writeJSONString(mapToConvert, out);
returnString = out.toString();
} catch (Exception e) {

}
return returnString;
}

do not forget to import ,
import org.json.simple.JSONValue;

download any type of file from gdrive using C# code

2012-12-28T12:36:00.004+05:30

First you have to import ,
using Google.GData.Client;
using Google.GData.Documents;
into your solution. Then use the below code for download the document.

DocumentsService service = new DocumentsService("testAttempt");   service.setUserCredentials("testDrive@gmail.com Email", "password");// Use the proper credential of your //gdrive

// Initialize a query object
Google.GData.Documents.DocumentsListQuery query = new   Google.GData.Documents.DocumentsListQuery();

            query.Title = test.txt;// search the title begin with d
            query.TitleExact = true;

            DocumentsFeed feed = service.Query(query);// Query send to Google server

            foreach (DocumentEntry entry in feed.Entries)
            {
                if (entry.Title.Text == "test.txt") // you may check the file name
                {
                    // create the download uri
                    Uri documentUri = new Uri(entry.Content.Src.Content);
                    string DocsPath = documentUri.AbsoluteUri;
                        string resourId = entry.ResourceId.ToString();// if you need the unique resource Id..
                    HttpWebRequest webRequest = (HttpWebRequest)
                    HttpWebRequest.Create(documentUri);
                    GDataGAuthRequestFactory factory = (GDataGAuthRequestFactory)
                    service.RequestFactory;

                    webRequest.Headers.Add("Authorization", "GoogleLoginauth=" + factory.GAuthToken);

                    HttpWebResponse webResponse = (HttpWebResponse)
                    webRequest.GetResponse();
                     Stream stream = null;
                    int bytesToRead = 1024;
                    byte[] buffer = new Byte[bytesToRead];
                    byte[] downloadedData = new byte[0];
                    HttpWebResponse fileResp = (HttpWebResponse)webRequest.GetResponse();
                    if (webRequest.ContentLength > 0)
                        fileResp.ContentLength = webRequest.ContentLength;

                    stream = fileResp.GetResponseStream();

                    MemoryStream mstream = new MemoryStream();
                    int length;
                    while (true)
                    {

                        length = stream.Read(buffer, 0, bytesToRead);

                        if (length == 0)
                        {
                            break;
                        }

                        else

                            mstream.Write(buffer, 0, length);
                    }

                    downloadedData = mstream.ToArray();
                    HttpContext.Current.Response.ClearContent();
                    HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=\"" + test.txt + "\"");

                    HttpContext.Current.Response.ContentType = "text/plain";// specify the type
                    HttpContext.Current.Response.BinaryWrite(downloadedData);
                    HttpContext.Current.ApplicationInstance.CompleteRequest();
                    HttpContext.Current.Response.Flush();
                    HttpContext.Current.Response.End();

                    stream.Close();
                    mstream.Close();

           }

}

thanks.

upload a file into gdrive using c#

2012-07-11T17:23:00.001+05:30

// this code snippet helps you to upload a file into a specific folder in gdrive
public static void Upload()
{
DocumentsService service = new DocumentsService("My Upload Application");

ClientLoginAuthenticator authenticator = new ClientLoginAuthenticator("My C\Upload Application", ServiceNames.Documents, "YouremailID", "YourPassword");

DocumentEntry entry = new DocumentEntry();

entry.MediaSource = new MediaFileSource(@"c:\newfolder\newtext.txt","text/plain");

Uri createUploadUrl = new Uri("https://docs.google.com/feeds/upload/create-session/default/private/full/folder%3A"+ResourceId+"/contents?convert=false");// Resource Id is the id of a folder in the gdrive.

//Uri createUploadUrl = new Uri("https://docs.google.com/feeds/upload/create-session/default/private/full");//upload into root folder

AtomLink link = new AtomLink(createUploadUrl.AbsoluteUri);
link.Rel = ResumableUploader.CreateMediaRelation;
entry.Links.Add(link);

// Set the service to be used to parse the returned entry
entry.Service = service;

// Instantiate the ResumableUploader component.
ResumableUploader uploader = new ResumableUploader();
// Set the handlers for the completion and progress events
uploader.AsyncOperationCompleted += new AsyncOperationCompletedEventHandler(OnDone);
uploader.AsyncOperationProgress += new AsyncOperationProgressEventHandler(OnProgress);

// Start the upload process
uploader.InsertAsync(authenticator, entry, new object());

}

static void OnDone(object sender, AsyncOperationCompletedEventArgs e)
{
DocumentEntry entry = e.Entry as DocumentEntry;
}

static void OnProgress(object sender, AsyncOperationProgressEventArgs e)
{

int percentage = e.ProgressPercentage;
}