anybody can correct this code? - java

#GET
#Produces(MediaType.APPLICATION_JSON)
public List<ProductData> getAllProductList(#QueryParam("hotel_id") int hotel_id) throws SQLException{
System.out.println("Hotel id id==="+hotel_id);
ProductData productData=new ProductData();
List<ProductData> products = new ArrayList<ProductData>();
rs=stmt.executeQuery("select * from products where hotel_id="+hotel_id);
while(rs.next()){
productData.setProductName(rs.getString("name"));
productData.setProductCategory(rs.getString("category"));
productData.setProductRate(rs.getDouble("rate"));
productData.setProductLogoPath(rs.getString("productLogoPath"));
products.add(productData);
}
return products;
}
I have passed List as JsonObject.Now i tried to get List value like
void handleResponse(String response) throws JSONException {
JSONObject jsonObject=new JSONObject(response);
JSONArray jsonArray = jsonObject.getJSONArray("products");
}
but i can't get the List value.anyBody can help me?

There is the simple way to convert json string to object :
Try this :
ObjectMapper mapper = new ObjectMapper();
POJO obj = mapper.readValue(yourJSONString, POJO.class);

Use method signature something similar like-
public Response getAllProduct..
&
return like-
return Response.status(Status.OK).entity(products).build();
For intg. layer use-
public ClientResponse<> similarSignatureMethod..
&
call via the client and then get response entity as-
clientResponse.getEntity();

Related

How to use "?" no get Path Rest?

I am developing a rest server in java, netbeans.
I have my GET request:
//myip/application/v1/cardapio/id=1
#Stateless
#Path("v1/cardapio")
public class CardapioResource {
#GET
#Produces("application/json")
#Path("id={id}")
public String getCardapio(#PathParam("id") int id) {
JsonArray array = (JsonArray) gson.toJsonTree(ejb.findById(id));
JsonObject obj = new JsonObject();
obj.add("dados", array);
return obj.toString();
}
}
It works correctly.
But I want to do differently, as I saw in other examples, I want to mark the beginning of the variables with the "?".
Ex: //myip/application/v1/cardapio/?id=1
#Stateless
#Path("v1/cardapio")
public class CardapioResource {
#GET
#Produces("application/json")
#Path("?id={id}")
public String getCardapio(#PathParam("id") int id) {
JsonArray array = (JsonArray) gson.toJsonTree(ejb.findById(id));
JsonObject obj = new JsonObject();
obj.add("dados", array);
return obj.toString();
}
}
Thus error 404, page not found.
What you seen in "other examples" is just normal usage of URL's query part. Just use it with #Queryparam
#Stateless
#Path("v1/cardapio")
public class CardapioResource {
#GET
#Produces("application/json")
#Path("/") // can be removed actually
public String getCardapio(#QueryParam("id") int id) {
JsonArray array = (JsonArray) gson.toJsonTree(ejb.findById(id));
JsonObject obj = new JsonObject();
obj.add("dados", array);
return obj.toString();
}
}
Here you are mapping getCardapio to v1/cardapio/ and you will try to get id from query string so
Ex: //myip/application/v1/cardapio/?id=1
will just work.
You can't, after ? sign it's query parameters and not path parameters
You can use #QueryParam("id")
You can also use
#RequestParam("id") int id

Getting volley response in another class

I made the first request successfully and I like to access my Volley response in other class , how can I do that because when I try to do that it return a null response
use interface and callback
public interface RestCallBack {
void onStart(String action);
void onComplete(String response, String action,Exception e);
}
And in your onResponse
listener.onComplete(response, action, null);
Then you can implement this interface in any class where you want the response.
At first its depends on your json data formate .......
You need to create a class
Declare a method in your class with a parameter string or array and call this method where you get json response
or follow this code
public class MyJsonParser {
public static Vector<MyModel> getJsonResponse(Context context,String response)
throws JSONException, IOException
{
final JSONObject stringResponse = new JSONObject(response);
final JSONObject responseHolder = stringResponse.getJSONObject("data");
final JSONArray jsonArray = responseHolder .getJSONArray("arrayData");
MyModel myModel;
Vector<MyModel> myArray = new Vector<MyModel>();
for (int i= 0;i<jsonArray .length();i++){
myModel= new MyModel();
JSONObject propertyHolder = jsonArray .getJSONObject(i);
myModel.setId(propertyHolder,"id");
myModel.setName(propertyHolder, "name");
myArray .addElement(myModel);
myModel= null;
}
return myArray ;
}
}
and call this method where you get json response like this....
MyJsonParser.getJsonResponse(context,response);

Unable to send Integer value to server using json

I am trying to send following Integer value to server.
int mStoreArea;
I use this link as REST client.
here is Request:
RestClient client = new RestClient(my_url);
client.AddParam("area", String.valueOf(c.getStoreArea()));
and the Error I face is : Int value required!
I retrieve this integer from a json object saved to a file, its procedure is described below:
public myClass(JSONObject json) throws JSONException {
mStoreArea = json.optInt(JSON_TAG);
}
public JSONObject toJSON() throws JSONException {
JSONObject json = new JSONObject();
json.put(JSON_TAG, mStoreArea);
return json;
}
I think you should use this:
client.AddParam("area", Integer.parseInt(c.getStoreArea()));

Android JPA JSON custom child object reading problems

I have the JSON Array below, created by a JPA function on a WebService:
[{"Producao":{"cliente":{"id":3,"nome_fantasia":"animal"},"data":"2013-11-08T00:00:00-02:00","id":1,"liberado":0,"prazo":"2013-11-14T00:00:00-02:00","produto":{"codigo_desenho":"CODIGO","dependencia":0,"descricao":"Produto1","disponivel":1,"id":39,"qtde":1,"raiz":0},"qtde":1}},{"Producao":{"cliente":{"id":1,"nome_fantasia":"bem"},"data":"2013-11-08T00:00:00-02:00","id":2,"liberado":0,"prazo":"2013-11-14T00:00:00-02:00","produto":{"codigo_desenho":"","dependencia":0,"descricao":"teste3","disponivel":1,"id":35,"qtde":1,"raiz":0},"qtde":2}}]
And I have to read it in my Android App. Converting them to a List.
The Object "Producao" has the Object "Cliente" as attribute.
I'm trying to do as below:
public static Producao jSONToProducao(JSONObject json) throws JSONException, ParseException{
JSONObject jPro = json.getJSONObject("Producao");
Producao producao = new Producao();
producao.setId(jPro.getInt("id"));
producao.setCliente(ClienteDAO.jSONToCliente(jPro.getJSONObject("cliente")));
.
.
.
return producao;
}
Where ClienteDAO.jSONToClient is:
public static Cliente jSONToCliente(JSONObject json) throws JSONException{
JSONObject jCli = json.getJSONObject("Cliente");
Cliente cliente = new Cliente();
cliente.setId(jCli.getInt("id"));
cliente.setNome_fantasia(jCli.getString("nome_fantasia"));
return cliente;
}
but the line producao.setCliente(ClienteDAO.jSONToCliente(jPro.getJSONObject("cliente"))) returns:
JSON Exception ~> No value for cliente”. ¬¬'
I tried to read it as a JSONArray too, but it didn't work.
JSON Exception ~> No value for cliente
because you are passing cliente JSONObject to jSONToCliente method from jSONToProducao so change your code as to get all values from cliente JSONObject :
public static Cliente jSONToCliente(JSONObject json) throws JSONException{
// json contain only cliente JSONObject
Cliente cliente = new Cliente();
cliente.setId(json.getInt("id"));
cliente.setNome_fantasia(json.getString("nome_fantasia"));
return cliente;
}

How do I sort JSONObjects in an JSONArray in Java (Server side)?

#GET
#Produces("application/json")
#Consumes("application/json")
#Path("/getStuff/{id}")
public String getStuff(
#PathParam("id") String id,
#Context HttpServletRequest request,
#Context HttpServletResponse response) throws Exception
{
Collection<Stuff> stuff = Manager.getStuff().values();
JSONArray jArray = new JSONArray();
for (Stuff i : stuff)
{
jsnObjct.put("id", i.getId());
jsnObjct.put("name", i.getName());
jArray.add(jsnObjct);
}
json = jArray.toString();
response.setContentType("text/javascript");
response.getOutputStream().print(json);
response.flushBuffer();
return null;
}
I'm guessing that you're using the net.sf.json library for this? If so, I'd try something like the following. I don't know for sure if this would work, but if it does work it will be by far the easiest approach. Unfortunately I'm not too familiar with that library so I'm not sure of the exact details (you may be able to skip the creation of a second JSONArray - not sure if add(int, Object) pushes objects down or overwrites them):
Object[] myArray = jArray.toArray();
myArray = Arrays.sort(myArray);
JSONArray sortedJArray = new JSONArray();
for (Object obj : myArray) {
sortedJArray.add(obj);
}

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