I have a JSoN data like this:
{
"data": {
"noofCity": "1",
"City 1": [
{
"id": "12",
"title": "Delhi"
}
]
},
"success": true
}
Now based on noofCity next tag City 1 will be generated. If noofCity will be 2 then there are two tag City 1 and City 2. Then how can I parse it using Json? Please tell me how can I generate my POJO class structure.
Your POJOs should look like below:
Main POJO for Response:
public class Response {
Data data;
boolean success;
}
For Data
public class Data {
int noofCity;
Map<String, List<City>> cityMap;
void put(String key, List<City> city){
if(cityMap == null){
cityMap = new HashMap<>();
}
cityMap.put(key, city);
}
public void setNoofCity(int noofCity) {
this.noofCity = noofCity;
}
public int getNoofCity() {
return noofCity;
}
}
For City
public class City {
int id;
String title;
}
But one of the most important think is a way how to deserialise Data. You have to prepare your own deserialiser for this, and define way how to fill HashMap as is shown in the code below:
public class DataDeserializer implements JsonDeserializer<Data> {
@Override
public Data deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
Data result = new Data();
Gson gson = new Gson();
JsonObject jsonObject= json.getAsJsonObject();
result.setNoofCity(jsonObject.get("noofCity").getAsInt());
for(int i =1; i<=result.getNoofCity() ; i++ ){
List<City> cities= gson.fromJson(jsonObject.getAsJsonArray("City "+ i), List.class);
result.put("City "+ i, cities);
}
return result;
}
}
And now you can deserialise you json
Gson gson = new GsonBuilder()
.registerTypeAdapter(Data.class, new DataDeserializer())
.create();
Response test = gson.fromJson(json, Response.class);
noofCityhas value 2 will you have two arraysCity 1andCity 2? Is that right?"City 1" and "City 2". He is concern about handling it dynamically because this list may grow beyond that.