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How can i create user in salesforce through REST api? Give me some examples

Am trying to create user into my salesforce account through REST api using java.But its returning 400 status code.Can you please guide me?
Here is the code am trying:
public static void createUsers() {
System.out.println("\n_______________ USER INSERT _______________");
String uri = baseUri + "/sobjects/User/";
System.out.println(uri);
try {
//create the JSON object containing the new lead details.
JSONObject lead = new JSONObject();
lead.put("FirstName", "Jake");
lead.put("LastName", "sully");
lead.put("Alias", "Jake");
lead.put("Email", "Jake#gmail.com");
lead.put("Username", "Jake#gmail.com");
lead.put("Name", "jake");
lead.put("UserRoleId","00E28000000oD8EEAU");
lead.put("Id", "10028000000GLSIAA4");
lead.put("EmailEncodingKey", "ISO-8859-1");
lead.put("TimeZoneSidKey", "Asia/Kolkata");
lead.put("LocaleSidKey", "en_US");
lead.put("ProfileId", "00e280000027hnGAAQ");
lead.put("LanguageLocaleKey", "en_US");
//Construct the objects needed for the request
HttpClient httpClient = HttpClientBuilder.create().build();
HttpPost httpPost = new HttpPost(uri);
httpPost.addHeader(oauthHeader);
httpPost.addHeader(prettyPrintHeader);
// The message we are going to post
StringEntity body = new StringEntity(lead.toString(1));
body.setContentType("application/json");
httpPost.setEntity(body);
//Make the request
HttpResponse response = httpClient.execute(httpPost);
//Process the results
System.out.println(response.toString());
int statusCode = response.getStatusLine().getStatusCode();
if (statusCode == 201) {
String response_string = EntityUtils.toString(response.getEntity());
JSONObject json = new JSONObject(response_string);
// Store the retrieved lead id to use when we update the lead.
leadId = json.getString("id");
} else {
System.out.println("Insertion unsuccessful. Status code returned is " + statusCode);
}
} catch (JSONException e) {
System.out.println("Issue creating JSON or processing results");
e.printStackTrace();
} catch (IOException ioe) {
ioe.printStackTrace();
} catch (NullPointerException npe) {
npe.printStackTrace();
}
}

Put POST request with HttpRequest

I'm making a google login through GoogleTransport and ClientLogin.
private final GoogleTransport transport = new GoogleTransport();
private final ClientLogin authenticator = new ClientLogin();
Then I'm accessing the Picasa web api.
transport.setVersionHeader(PicasaWebAlbums.VERSION);
transport.applicationName = "google-picasaandroidsample-1.0";
HttpTransport.setLowLevelHttpTransport(ApacheHttpTransport.INSTANCE);
authenticator.authTokenType = PicasaWebAlbums.AUTH_TOKEN_TYPE;
authenticator.username = StaticVariables.USER_NAME+StaticVariables.USER_DOMAIN;
authenticator.password = StaticVariables.USER_PASSWORD;
try {
authenticator.authenticate().setAuthorizationHeader(transport);
HttpRequest request = transport.buildPostRequest();
request.setUrl("https://picasaweb.google.com/data/feed/api/user/default");
request.execute();
} catch (HttpResponseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
The above is working fine.
Now I want to set a POST request. But buildPostRequest() method does not support any String parameter. So, unable to post any data at the URL. How to achieve it? Please help.

You may use HttpPost with NameValuePair
private boolean sendData(ArrayList<NameValuePair> data) {
try {
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(YOUR_URL);
httppost.setEntity(new UrlEncodedFormEntity(data));
HttpResponse response = httpclient.execute(httppost);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
Then create your Name Value pairs in a different method as
private ArrayList<NameValuePair> setupData() {
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(
3);
nameValuePairs.add(new BasicNameValuePair(USERID, SAMPLE_USER_ID);
nameValuePairs.add(new BasicNameValuePair(USERNAME, SAMPLE_USER_NAME));
return nameValuePairs;
}
Atlast call the send data method in an AsyncTask or Intent service as sendData(setupdata())

Data in a post request is usually sent in the body of the request.

Android, HttpPost for WCF

I'm trying to use httpost to get data from our WCF webservice
If the webservice function is without params , something like List getAllMessages()
I'm getting the List in json, no problem here
The tricky part is when the function needs to get argument
let's say Message getMessage(string id)
when trying to call this kind of functions I get error code 500
The working code is:
public String GetAllTitles()
{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(
"http://www.xxx.com/Service/VsService.svc/GetAllTitles");
httppost.setHeader("Content-Type", "application/json; charset=utf-8");
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
return readHttpResponse(response);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
this code works great for functios without arguments..
I took this code and changed it to:
public String SearchTitle(final String id)
{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost(
"http://www.xxx.com/Service/VsService.svc/SearchTitle");
httppost.setHeader("Content-Type", "application/json; charset=utf-8");
httppost.setHeader("Accept", "application/json; charset=utf-8");
NameValuePair data = new BasicNameValuePair("id",id);
try {
// Add your data
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
nameValuePairs.add(data);
httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = httpclient.execute(httppost);
return readHttpResponse(response);
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}
The function header in thr webservice is:
[OperationContract]
public TitleResult SearchTitle(string id)
{
Stopwatch sw = LogHelper.StopwatchInit();
try
{
TitleManager tm = new TitleManager();
Title title = tm.TitleById(id);
sw.StopAndLog("SearchTitle", "id: " + id);
return new TitleResult() { Title = title };
}
catch (Exception ex)
{
sw.StopAndLogException("SearchTitle", ex, "id: " + id);
return new TitleResult() { Message = ex.Message };
}
}
Anyone can see what am I missing?
Thanks, I'm breaking my head over this one.

List isn't json,
try
String data = "{ id : \"" + id + "\" }";
Don't forget to set Content-Length to data.length.

Not getting JSON value in Spring Controller method

I need to send some data from my Android device to my server. I am doing this through JSON. I have implemented the JSON post on Android, and I am trying to do a mapping on the server side in order to retrieve that data. My problem is that I keep getting an empty string.
Android method used to send JSON:
private void sendJson(final String json, final String URL) {
Thread t = new Thread(){
public void run() {
Looper.prepare(); //For Preparing Message Pool for the child Thread
HttpClient client = new DefaultHttpClient();
HttpConnectionParams.setConnectionTimeout(client.getParams(), 10000); //Timeout Limit
try{
HttpPost post = new HttpPost(URL);
StringEntity se = new StringEntity(json);
se.setContentType(new BasicHeader(HTTP.CONTENT_TYPE, "application/json"));
post.setEntity(se);
client.execute(post);
}
catch(Exception e){
e.printStackTrace();
}
Looper.loop(); //Loop in the message queue
}
};
t.start();
}
Server-side method:
#RequestMapping(value = "/getLatestCalls", method = RequestMethod.POST)
public void getData(#ModelAttribute String json){
//... do something
}
The thing is that in this method my json String is "" every time. I have also tried using #RequestParam but with that it doesn't enter the method anymore. I have also tried with #ModelAttribute("json").
Can someone enlighten me a little here? Thank you in advance.

Here is the solution and it works fine.
server-side
#Controller
public class DataCollector {
#RequestMapping(value = "/clientdatacollector", method = RequestMethod.POST)
public #ResponseBody
void abc(Writer writer, #RequestParam("gpsdata") String gpsJSON) {
try {
// here is your jsonstring ;)
writer.write(gpsJSON.toString());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
client-side
public static void httptest() {
ArrayList<TravellingData> tdArray = new ArrayList<TravellingData>();
Gson gson = new Gson();
String jsonString = "";
for (int i = 0; i < 1; i++) {
tdArray.add(ObjectCreater.createMockTravellingDataObject());
}
jsonString = gson.toJson(tdArray);
HttpClient client = new DefaultHttpClient();
HttpPost post = null;
try {
post = new HttpPost(
"http://localhost:8080/uygulama/clientdatacollector");
} catch (URISyntaxException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
nameValuePairs.add(new BasicNameValuePair("gpsdata", jsonString));
post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
HttpResponse response = null;
try {
response = client.execute(post);
} catch (HttpException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
BufferedReader rd = new BufferedReader(new InputStreamReader(
response.getEntity().getContent()));
String line = "";
while ((line = rd.readLine()) != null) {
System.out.println(line);
}
} catch (IOException e) {
e.printStackTrace();
}
}

Try using #RequestBody. It should work.

Android, uploading a photo to host on imgur programatically

I have tried different methods to upload and retrieve a link via imgur but none have been successfull despite looking at the imgur api.
http://api.imgur.com/examples#uploading_java
But the following methods partly works..
im trying to retrieve,
errors: if any errors occured.
link to image: the link to the image hosted
delete link: the link to delete the image hosted
But i only end up with the "delete link", as the others are blank,
check it out:
public void post(String path) {
List<NameValuePair> postContent = new ArrayList<NameValuePair>(2);
postContent.add(new BasicNameValuePair("key", DEV_KEY));
postContent.add(new BasicNameValuePair("image", path));
String url = "http://api.imgur.com/2/upload";
HttpClient httpClient = new DefaultHttpClient();
HttpContext localContext = new BasicHttpContext();
HttpPost httpPost = new HttpPost(url);
try {
MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
for(int index=0; index < postContent.size(); index++) {
if(postContent.get(index).getName().equalsIgnoreCase("image")) {
// If the key equals to "image", we use FileBody to transfer the data
entity.addPart(postContent.get(index).getName(), new FileBody(new File (postContent.get(index).getValue())));
} else {
// Normal string data
entity.addPart(postContent.get(index).getName(), new StringBody(postContent.get(index).getValue()));
}
}
httpPost.setEntity(entity);
HttpResponse response = httpClient.execute(httpPost, localContext);
mImgurResponse = parseResponse (response);
Iterator it = mImgurResponse.entrySet().iterator();
while(it.hasNext()){
HashMap.Entry pairs = (HashMap.Entry)it.next();
Log.i("INFO",pairs.getKey().toString());
if(pairs.getValue()!=null){
reviewEdit.setText(pairs.getValue().toString());
Log.i("INFO",pairs.getValue().toString());
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
private Map<String,String> parseResponse(HttpResponse response) {
String xmlResponse = null;
try {
xmlResponse = EntityUtils.toString(response.getEntity());
} catch (ParseException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
if (xmlResponse == null) return null;
HashMap<String, String> ret = new HashMap<String, String>();
ret.put("error", getXMLElementValue(xmlResponse, "error_msg"));
ret.put("delete", getXMLElementValue(xmlResponse, "delete_page"));
ret.put("original", getXMLElementValue(xmlResponse, "original_image"));
return ret;
}
private String getXMLElementValue(String xml, String elementName) {
if (xml.indexOf(elementName) >= 0)
return xml.substring(xml.indexOf(elementName) + elementName.length() + 1,
xml.lastIndexOf(elementName) - 2);
else
return null;
}
All i get back in the end is a hashmap mImageResponse with only the delete link...
any ideas on what im doing wrong?

The fix to this was merely to change the URL to: imgur.com/api/upload.xml