How to send JSON data in request to rest web service - json

Question

I have created a rest webservice which has a below code in one method:
#POST
#Path("/validUser")
#Consumes(MediaType.APPLICATION_JSON)
#Produces(MediaType.APPLICATION_JSON)
public JSONObject validUserLogin(#QueryParam(value="userDetails") String userDetails){
JSONObject json = null;
try{
System.out.println("Service running from validUserLogin :"+userDetails);
json = new JSONObject(userDetails);
System.err.println("UserName : "+json.getString("userName")+" password : "+json.getString("password"));
json.put("httpStatus","OK");
return json;
}
catch(JSONException jsonException) {
return json;
}
}
I am using Apache API in the client code.And below client code is calling this service, by posting some user related data to this service:
public static String getUserAvailability(String userName){
JSONObject json=new JSONObject();
try{
HttpContext context = new BasicHttpContext();
HttpClient client = new DefaultHttpClient();
client.getParams().setParameter(ClientPNames.COOKIE_POLICY, CookiePolicy.RFC_2109);
URI uri=new URIBuilder(BASE_URI+PATH_VALID_USER).build();
HttpPost request = new HttpPost(uri);
request.setHeader("Content-Type", "application/json");
json.put("userName", userName);
StringEntity stringEntity = new StringEntity(json.toString());
request.setEntity(stringEntity);
HttpResponse response = client.execute(request,context);
System.err.println("content type : \n"+EntityUtils.toString(response.getEntity()));
}catch(Exception exception){
System.err.println("Client Exception: \n"+exception.getStackTrace());
}
return "OK";
}
The problem is, I am able to call the service, but the parameter I passed in the request to service results in null.
Am I posting the data in a wrong way in the request. Also I want to return some JSON data in the response, but I am not able to get this.

Answer 1

With the help of Zack , some how i was able to resolve the problem,
I used jackson-core jar and changed the service code as below.
#POST
#Path("/validUser")
#Consumes(MediaType.APPLICATION_JSON)
#Produces(MediaType.APPLICATION_JSON)
public JSONObject validUserLogin(String userDetails){
ObjectMapper mapper = new ObjectMapper();
JsonNode node = mapper.readValue(userDetails, JsonNode.class);
System.out.println("Service running from validUserLogin :"+userDetails);
System.out.println(node.get("userName").getTextValue());
//node.("httpStatus","OK");
return Response.ok(true).build();
}