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How to validate Apple's "Auto-Renewable In App Purchase Receipt Validation" API using java?

Can someone guide me how to test iOS(auto-renewable IAP) Receipt Validation API by using Sandbox URL?
I have tried this below snippet.
public void validateReceiptData(VerifyReceiptRequestView requestview) {
System.out.println("validateReceiptData ....................");
String VERIFICATION_URL=" https://sandbox.itunes.apple.com/verifyReceipt";
HttpClient httpClient = new DefaultHttpClient();
try {
HttpPost request = new HttpPost(VERIFICATION_URL);
JSONObject requestData = new JSONObject();
requestData.put("receipt-data", requestview.getReceiptdata());
requestData.put("password", requestview.getPassword());
StringEntity requestEntity = new StringEntity(requestData.toString());
request.addHeader("content-type", "application/x-www-form-urlencoded");
request.setEntity(requestEntity);
HttpResponse response =httpClient.execute(request);
String responseBody = EntityUtils.toString(response.getEntity());
JSONObject responseJSON = new JSONObject(responseBody);
System.out.println("responseJSON -------------->"+responseJSON);
}catch(Exception e) {
e.printStackTrace();
}
}
But I need sample request data for the below mentioned fields
requestData.put("receipt-data", requestview.getReceiptdata());
requestData.put("password", requestview.getPassword());
Does the field requestview.getReceiptdata() requires any Valid Purchased receipt or does Apple provides any sample receipt data to test this API in SandBox environment.

Java JSON Apache POST Parameters

So I've got this code:
HttpClient httpClient = new DefaultHttpClient();
try {
HttpPost request = new HttpPost("url");
StringEntity params = new StringEntity("stuff");
request.addHeader("content-type", "application/json");
//request.addHeader("Accept","application/json");
request.setEntity(params);
HttpResponse response = httpClient.execute(request);
//stuff
} catch (Exception ex) {
//stuff
} finally {
httpClient.getConnectionManager().shutdown();
}
I need to create a POST request which I can do with curl -X POST /groups/:group_id/members/add etc but I'm not sure how to add the /groups/ param to my code... I'm not super familiar with how to do this so any advice would be appreciated. Thanks!
EDIT 1: (SOLVED)
Have used the suggested code but would like some help with variables used in the string while remaining valid JSON format, if possible.
EDIT 2:
Using that method, can you show an example of how to add multiple users to that one StringEntity? So like user1 is "User1" and has the email "Email1" and user2 has "User2" and "Email2" etc

Just create a url string using the prams you have and pass it as argument to HttpPost()
DefaultHttpClient httpClient = new DefaultHttpClient();
String groupId = "groupId1";
String URL = "http://localhost:8080/"+groupId+"/members/add"
HttpPost postRequest = new HttpPost(
URL );
StringEntity input = new StringEntity("{\"name\":matt,\"from\":\"stackovefflow\"}");
input.setContentType("application/json");
postRequest.setEntity(input);
HttpResponse response = httpClient.execute(postRequest);
UPDATED
The input to StringEntity is a string whihc you can manipulate in any way.
You can define a method like
private createStringEntity(String name, String email){
return new StringEntity("{\"name\":\""+name+"\",\"email\":\""+email+"\"}");
}

The "/groups/..." part is not a parameter but a fraction of the url. I dont think this will work, because "url" is just a String, change it to this:
HttpPost request = new HttpPost("http://stackoverflow.com/groups/[ID]/members/add");

Use Java to get Github repositories

I'm using the following code to send a http request to github.
String url = "https://api.github.com/repositories";
try {
CloseableHttpClient httpClient = HttpClientBuilder.create().build();
HttpPost request = new HttpPost(url);
// StringEntity params = new StringEntity(body);
request.addHeader("content-type", "application/json");
// request.setEntity(params);
HttpResponse result = httpClient.execute(request);
String json = EntityUtils.toString(result.getEntity(), "UTF-8");
System.out.println(json);
} catch (IOException ex) {
}
I got output: {"message":"Not Found","documentation_url":"https://developer.github.com/v3"}
If use directly put "https://api.github.com/repositories" in browser, a lot of useful information will be shown. My question is how can I get the information I see when using browser by using Java.

You should use HttpGet instead of HttpPost. Just like your browser sends a GET request.

Method to convert JSONObject to List<NameValuePair>

Hi iam creating an android application. In my application i have some form fields like edittext and radio buttons i am creating a JSONObject by retrieving text from all the form fields. JsonObject is created successfully. Now i want to pass this object to my PHP page where i have written code for getting this details and storing it in database. My problem is i am not understanding how to send this JSON object through httpPost or httpGet method. Only way i know is send parameters through List<NameValuePair> so i'm trying to convert JSONObject to List<NameValuePair>. Can anybody provide a method which can directly convert my JSONObject to List<NameValuePair>. Is there any predefined method for doing this. Or can any one provide solution where i can directly send by JSONObject to PHP and retrieve there.

Pass your JSONObject as a string to the String Entity constructor and then pass it to setEntity()
Sample:
HttpPost request = new HttpPost("//website");
StringEntity params =new StringEntity("passmyjson=" + yourJSONOBject.toString());
request.addHeader("content-type", "//header");
request.setEntity(params);
HttpResponse response = httpClient.execute(request);
in php File to check that it works;
<?php
print_r($_POST);
$json_string = $_POST['passmyjson'];
$json = json_decode($json_string);
print_r($json);
?>

You can do that with Apache HttpClient. I assume you have already a PHP handler that handles this request. Simply,
Create your JSONObject
Put your desired values
Send that json to php handler
You need to send request as application/x-www-form-urlencoded
Let's call url : http://your_php_service.com/handleJson;
HttpClient httpClient = new DefaultHttpClient();
JSONObject json = new JSONObject();
json.put("key", "val");
try {
HttpPost request = new HttpPost("http://your_php_service.com/handleJson");
StringEntity params = new StringEntity("json=" + json.toString());
request.addHeader("content-type", "application/x-www-form-urlencoded");
request.setEntity(params);
HttpResponse response = httpClient.execute(request);
} catch (Exception ex) {
} finally {
httpClient.getConnectionManager().shutdown();
}
The format of request param will be ;
json={"key": "val"}
And you can handle this on php side like;
<?php
.....
$json = $_POST["json"]; // This will be json string
.....

Thank you all i got it
I added the following lines to my android Activity class
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpResponse httpResponse;
HttpPost httppost = new HttpPost(link); //-->link is the php page url
httppost.setEntity(new StringEntity(obj.toString())); //-->obj is JSONObject
httpResponse = httpClient.execute(httppost);
HttpEntity httpEntity = httpResponse.getEntity();
and in my php file i have added the following code
$msg=json_decode(file_get_contents('php://input'), true);
To get particular value from recieved Json string i added this $data = $msg['name'] ;
It is working

Log-in Webpage has hidden token that gets sent in a POST when submitting form. How to use the token in a Java HttpPost?

So there is this website that has a login form. I want to log in and then download a file. When submitting the form, not only do username and password get transmitted in the http POST but also a token that is in a hidden <input> tag.
Now, my Problem is that whenever I open the URL in java and get the token to make a POST the token is invalid when I use a HttpClient.
I somehow need to use the same client for calling the website to get the token and making the post. Unfortunately I get a 403 FORBIDDEN return code when trying to access the file.
This is what I have so far:
public static void main(String[] args){
try {
String token = getTokenFromPage("http://my.url");
HttpContext context = new BasicHttpContext();
DefaultHttpClient client = new DefaultHttpClient();
List <NameValuePair> parameters = new ArrayList <NameValuePair>();
HttpPost post = new HttpPost("http://my.url");
parameters.add(new BasicNameValuePair("username", "MYNAME"));
parameters.add(new BasicNameValuePair("password", "MYPW"));
parameters.add(new BasicNameValuePair("token", token));
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(parameters, HTTP.UTF_8);
post.setEntity(entity);
System.out.println("URL: " + post.getURI());
HttpResponse postResponse = client.execute(post, context);
System.out.println(postResponse.getStatusLine());
EntityUtils.consume(postResponse.getEntity());
//Now download the file
HttpGet httpget = new HttpGet("http://url.to.file");
HttpResponse getResponse = client.execute(httpget, context);
System.out.println(getResponse.toString());
System.out.print((postResponse.getEntity().getContent()));
client.getConnectionManager().shutdown();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

You are going to have to make an HTTP request for the login page, parse the resulting HTML in the HTTP response stream, and get the token value to use from there. Using a library like jsoup to parse the HTML would be advisable.