Receive array of objects in JSON by Spring Boot RestApi Controller

Receive array of objects in JSON by Spring Boot RestApi Controller - java

I want to send array of objects like this to Spring REST Controller:
{
"measureList": [
{
"apiKey": "exampleKEY",
"stationId": "abcdef123",
"date": "2022-02-18T17:43:51.787535Z",
"temp": "20.5",
"humidity": "60.4",
"pressure": "1020.5",
"pm25": "100.0",
"pm25Corr": "150.0",
"pm10": "90.0"
},
{
"apiKey": "exampleKEY",
"stationId": "abcdef123",
"date": "2022-02-18T17:43:53.254309Z",
"temp": "20.5",
"humidity": "60.4",
"pressure": "1020.5",
"pm25": "100.0",
"pm25Corr": "150.0",
"pm10": "90.0"
}
]
}
I have created NewMeausurePackageDto like this:
package com.weather.server.domain.dto;
import java.util.ArrayList;
import java.util.List;
public class NewMeasurePackageDto {
private ArrayList<NewMeasureDto> measureList;
public NewMeasurePackageDto(ArrayList<NewMeasureDto> measureList) {
this.measureList = measureList;
}
public NewMeasurePackageDto() {
}
public ArrayList<NewMeasureDto> getNewMeasureListDto() {
return measureList;
}
#Override
public String toString() {
return "NewMeasurePackageDto{" +
"measureList=" + measureList +
'}';
}
}
NewMeasureDto class:
package com.weather.server.domain.dto;
public class NewMeasureDto {
private String apiKey;
private String stationId;
private String date;
private String temp;
private String humidity;
private String pressure;
private String pm25;
private String pm10;
private String pm25Corr;
//station_id
public NewMeasureDto() {
}
private NewMeasureDto(Builder builder){
apiKey = builder.apiKey;
stationId = builder.stationId;
date = builder.date;
temp = builder.temp;
humidity = builder.humidity;
pressure = builder.pressure;
pm25 = builder.pm25;
pm10 = builder.pm10;
pm25Corr = builder.pm25Corr;
}
public String getApiKey() {
return apiKey;
}
public String getStationID() {
return stationId;
}
public String getDate() {
return date;
}
public String getTemp() {
return temp;
}
public String getHumidity() {
return humidity;
}
public String getPressure() {
return pressure;
}
public String getPm25() {
return pm25;
}
public String getPm10() {
return pm10;
}
public String getPm25Corr() {
return pm25Corr;
}
public static final class Builder {
private String apiKey;
private String stationId;
private String date;
private String temp;
private String humidity;
private String pressure;
private String pm25;
private String pm10;
private String pm25Corr;
public Builder() {
}
public Builder apiKey(String apiKey) {
this.apiKey = apiKey;
return this;
}
public Builder stationID(String stationId) {
this.stationId = stationId;
return this;
}
public Builder date(String date) {
this.date = date;
return this;
}
public Builder temp(String temp) {
this.temp = temp;
return this;
}
public Builder humidity(String humidity) {
this.humidity = humidity;
return this;
}
public Builder pressure(String pressure){
this.pressure = pressure;
return this;
}
public Builder pm25(String pm25){
this.pm25 = pm25;
return this;
}
public Builder pm10(String pm10){
this.pm10 = pm10;
return this;
}
public Builder pm25Corr(String pm25Corr){
this.pm25Corr = pm25Corr;
return this;
}
public NewMeasureDto build() {
return new NewMeasureDto(this);
}
}
}
And request mapping in RestController:
#PostMapping(value="/new-measure-package") //addStation id
public ResponseEntity<Void> newMeasure(#RequestBody NewMeasurePackageDto measureList){
//if api key is valid
return measureService.saveMeasurePackage(measureList.getNewMeasureListDto()) ? new ResponseEntity<>(HttpStatus.OK) :
new ResponseEntity<>(HttpStatus.BAD_REQUEST);
}
With this code all I got is error about null measureList in Service function when trying to iterate over the list. I tried changing #RequestBody to
List<NewMeasureDto> measureList, and to Map<String, NewMeasureDto> measureList but still measureList is null or empty.

Thanks to ShaharT suggestion I found the answer.
There was missing setter in NewMeasurePackageDto, the class should look like this:
package com.weather.server.domain.dto;
import java.util.ArrayList;
public class NewMeasurePackageDto {
private ArrayList<NewMeasureDto> measureList;
public NewMeasurePackageDto(ArrayList<NewMeasureDto> measureList) {
this.measureList = measureList;
}
public NewMeasurePackageDto() {
}
public ArrayList<NewMeasureDto> getMeasureList() {
return measureList;
}
public void setMeasureList(ArrayList<NewMeasureDto> measureList) {
this.measureList = measureList;
}
#Override
public String toString() {
return "NewMeasurePackageDto{" +
"measureList=" + measureList +
'}';
}
}
Conclusion is: when dealing with object of arrays in JSON, there must be setter method for variable storing list in DTO.

Related

How can I parse object inside array using retrofit

[
{
"login": "mojombo",
"id": 1,
"node_id": "MDQ6VXNlcjE=",
"avatar_url": "https://avatars0.githubusercontent.com/u/1?v=4",
"gravatar_id": "",
"url": "https://api.github.com/users/mojombo",
"html_url": "https://github.com/mojombo",
"followers_url": "https://api.github.com/users/mojombo/followers",
"following_url": "https://api.github.com/users/mojombo/following{/other_user}",
"gists_url": "https://api.github.com/users/mojombo/gists{/gist_id}",
"starred_url": "https://api.github.com/users/mojombo/starred{/owner}{/repo}",
"subscriptions_url": "https://api.github.com/users/mojombo/subscriptions",
"organizations_url": "https://api.github.com/users/mojombo/orgs",
"repos_url": "https://api.github.com/users/mojombo/repos",
"events_url": "https://api.github.com/users/mojombo/events{/privacy}",
"received_events_url": "https://api.github.com/users/mojombo/received_events",
"type": "User",
"site_admin": false
}
]
Json: https://api.github.com/users
This is URL of an API... how can i parse this object to fetch the data using retrofit?

Here is the example on how to fetch JSON object with array using retrofit. I believe you won't have troubles changing it to work with your data.
Example.java
public class Example {
#SerializedName("PnrNumber")
#Expose
private String pnrNumber;
#SerializedName("Status")
#Expose
private String status;
#SerializedName("ResponseCode")
#Expose
private String responseCode;
#SerializedName("TrainNumber")
#Expose
private String trainNumber;
#SerializedName("TrainName")
#Expose
private String trainName;
#SerializedName("JourneyClass")
#Expose
private String journeyClass;
#SerializedName("ChatPrepared")
#Expose
private String chatPrepared;
#SerializedName("From")
#Expose
private String from;
#SerializedName("To")
#Expose
private String to;
#SerializedName("JourneyDate")
#Expose
private String journeyDate;
#SerializedName("Passangers")
#Expose
private List<Passanger> passangers = null;
public String getPnrNumber() {
return pnrNumber;
}
public void setPnrNumber(String pnrNumber) {
this.pnrNumber = pnrNumber;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getResponseCode() {
return responseCode;
}
public void setResponseCode(String responseCode) {
this.responseCode = responseCode;
}
public String getTrainNumber() {
return trainNumber;
}
public void setTrainNumber(String trainNumber) {
this.trainNumber = trainNumber;
}
public String getTrainName() {
return trainName;
}
public void setTrainName(String trainName) {
this.trainName = trainName;
}
public String getJourneyClass() {
return journeyClass;
}
public void setJourneyClass(String journeyClass) {
this.journeyClass = journeyClass;
}
public String getChatPrepared() {
return chatPrepared;
}
public void setChatPrepared(String chatPrepared) {
this.chatPrepared = chatPrepared;
}
public String getFrom() {
return from;
}
public void setFrom(String from) {
this.from = from;
}
public String getTo() {
return to;
}
public void setTo(String to) {
this.to = to;
}
public String getJourneyDate() {
return journeyDate;
}
public void setJourneyDate(String journeyDate) {
this.journeyDate = journeyDate;
}
public List<Passanger> getPassangers() {
return passangers;
}
public void setPassangers(List<Passanger> passangers) {
this.passangers = passangers;
}
}
Passanger.Java
public class Passanger {
#SerializedName("Passenger")
#Expose
private String passenger;
#SerializedName("BookingStatus")
#Expose
private String bookingStatus;
#SerializedName("CurrentStatus")
#Expose
private String currentStatus;
public String getPassenger() {
return passenger;
}
public void setPassenger(String passenger) {
this.passenger = passenger;
}
public String getBookingStatus() {
return bookingStatus;
}
public void setBookingStatus(String bookingStatus) {
this.bookingStatus = bookingStatus;
}
public String getCurrentStatus() {
return currentStatus;
}
public void setCurrentStatus(String currentStatus) {
this.currentStatus = currentStatus;
}
}
Here are the classes which are generated from the Response which you have provided in the question.
You can use this link to generate the POJO class for JSON response.
JSON TO POJO
Add this gradle:
implementation 'com.google.code.gson:gson:2.8.2'
Init the Gson buildr:
private Gson gson;
GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.setDateFormat("M/d/yy hh:mm a");
gson = gsonBuilder.create();
Parse the JSON using GSON
gson.fromJson(jsonObject.getJSONObject("data").toString(), Example.class);
These are the basic steps to parse the JSON using GSON.
For more information you can refer to the below article:
Parsing JSON on Android using GSON
Or Check the GSON official GitHub Repository
GSON

Json Get Request using retrofit won't work

Until this api i had this ones and my code worked now i can not figure out what i need to get and what to put in Map also i don't know where to start to get this response into my app.
This api i know how work and i have working code for it :
https://gyazo.com/f2eb4858c48c31c5c48765a9e7512179
But this one api is really hard to figure for me.
https://gyazo.com/d2bad9dbe66bf7c51b169b54a68a003a
I really don't know what i need to put here in Map and how to get "result" array(if that is array list?? )
Thank you guys this is my unworking example.
Datas.class
package Model.BittrexApiModel;
public class Datas {
private Result result;
public Result getResult() {
return result;
}
public void setResult(Result result) {
this.result = result;
}
public Datas withDatas(Result result){
this.result=result;
return this;
}
}
Here is my Result POJO CLASS
package Model.BittrexApiModel;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Result {
#SerializedName("MarketName")
#Expose
private String marketName;
#SerializedName("High")
#Expose
private Double high;
#SerializedName("Low")
#Expose
private Double low;
#SerializedName("Volume")
#Expose
private Double volume;
#SerializedName("Last")
#Expose
private Double last;
#SerializedName("BaseVolume")
#Expose
private Double baseVolume;
#SerializedName("TimeStamp")
#Expose
private String timeStamp;
#SerializedName("Bid")
#Expose
private Double bid;
#SerializedName("Ask")
#Expose
private Double ask;
#SerializedName("OpenBuyOrders")
#Expose
private Integer openBuyOrders;
#SerializedName("OpenSellOrders")
#Expose
private Integer openSellOrders;
#SerializedName("PrevDay")
#Expose
private Double prevDay;
#SerializedName("Created")
#Expose
private String created;
public String getMarketName() {
return marketName;
}
public void setMarketName(String marketName) {
this.marketName = marketName;
}
public Result withMarketName(String marketName) {
this.marketName = marketName;
return this;
}
public Double getHigh() {
return high;
}
public void setHigh(Double high) {
this.high = high;
}
public Result withHigh(Double high) {
this.high = high;
return this;
}
public Double getLow() {
return low;
}
public void setLow(Double low) {
this.low = low;
}
public Result withLow(Double low) {
this.low = low;
return this;
}
public Double getVolume() {
return volume;
}
public void setVolume(Double volume) {
this.volume = volume;
}
public Result withVolume(Double volume) {
this.volume = volume;
return this;
}
public Double getLast() {
return last;
}
public void setLast(Double last) {
this.last = last;
}
public Result withLast(Double last) {
this.last = last;
return this;
}
public Double getBaseVolume() {
return baseVolume;
}
public void setBaseVolume(Double baseVolume) {
this.baseVolume = baseVolume;
}
public Result withBaseVolume(Double baseVolume) {
this.baseVolume = baseVolume;
return this;
}
public String getTimeStamp() {
return timeStamp;
}
public void setTimeStamp(String timeStamp) {
this.timeStamp = timeStamp;
}
public Result withTimeStamp(String timeStamp) {
this.timeStamp = timeStamp;
return this;
}
public Double getBid() {
return bid;
}
public void setBid(Double bid) {
this.bid = bid;
}
public Result withBid(Double bid) {
this.bid = bid;
return this;
}
public Double getAsk() {
return ask;
}
public void setAsk(Double ask) {
this.ask = ask;
}
public Result withAsk(Double ask) {
this.ask = ask;
return this;
}
public Integer getOpenBuyOrders() {
return openBuyOrders;
}
public void setOpenBuyOrders(Integer openBuyOrders) {
this.openBuyOrders = openBuyOrders;
}
public Result withOpenBuyOrders(Integer openBuyOrders) {
this.openBuyOrders = openBuyOrders;
return this;
}
public Integer getOpenSellOrders() {
return openSellOrders;
}
public void setOpenSellOrders(Integer openSellOrders) {
this.openSellOrders = openSellOrders;
}
public Result withOpenSellOrders(Integer openSellOrders) {
this.openSellOrders = openSellOrders;
return this;
}
public Double getPrevDay() {
return prevDay;
}
public void setPrevDay(Double prevDay) {
this.prevDay = prevDay;
}
public Result withPrevDay(Double prevDay) {
this.prevDay = prevDay;
return this;
}
public String getCreated() {
return created;
}
public void setCreated(String created) {
this.created = created;
}
public Result withCreated(String created) {
this.created = created;
return this;
}
}
And here is my BittrexResponse.class ( i think this one is not working.)
package Model.BittrexApiModel;
import java.util.Map;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class BittrexResponse {
#SerializedName("success")
#Expose
private Boolean success;
#SerializedName("message")
#Expose
private String message;
#SerializedName("result")
#Expose
private Map<String, Result> datas;
public Map<String,Result> getDatas(){
return datas;
}
public void setDatas(Map<String,Result> datas){
this.datas=datas;
}
//private List<Result> result = new ArrayList<>();
//This is first original JSONSCHEMA2POJO - SAVING RESPONSE DON't WORK
// private List<Result> result = new ArrayList<Result>();
public Boolean getSuccess() {
return success;
}
public void setSuccess(Boolean success) {
this.success = success;
}
public BittrexResponse withSuccess(Boolean success) {
this.success = success;
return this;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public BittrexResponse withMessage(String message) {
this.message = message;
return this;
}
ApiClient.class (working , tested on earlier examples)
package Model.CoinMarketCapApiModel;
import com.test.retrofit.CryptoCyber.Settings;
import okhttp3.OkHttpClient;
import okhttp3.logging.HttpLoggingInterceptor;
import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;
public class ApiClient {
public static final String BASE_URL = Settings.getBase_url();
private static Retrofit retrofit = null;
public static Retrofit getClient() {
HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
OkHttpClient client = new OkHttpClient.Builder().addInterceptor(interceptor).build();
retrofit = new Retrofit.Builder()
.client(client)
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
return retrofit;
}
}
I hope someone will help me to figure out why i don't know get data and save it to map...
P.s. here is link for api
CLICK HERE

Here's a possible way to design your classes to correctly parse the response.
ApiResponse
public class ApiResponse {
private boolean success;
private String message;
#SerializedName("result")
private List<Market> markets;
// Other fields + getters&setters
...
}
Market
public class Market {
#SerializedName("MarketName")
private String marketName;
#SerializedName("High")
private double high;
#SerializedName("Low")
private double low;
#SerializedName("Volume")
private double volume;
// Other fields + getters&setters
...
}
Main
public class Main {
public static void main(String[] args) throws IOException {
Retrofit retrofit = createRetrofit();
Api api = retrofit.create(Api.class);
retrofit2.Response<ApiResponse> response = api.getMarketSummaries().execute();
if (!response.isSuccessful()) {
// Handle error case
} else {
ApiResponse marketApiResponse = response.body();
System.out.println(marketApiResponse);
}
}
private static Retrofit createRetrofit() {
return new Retrofit.Builder()
.baseUrl("https://bittrex.com/api/v1.1/public/")
.addConverterFactory(GsonConverterFactory.create())
.build();
}
}
It will print something like this (only first item of the list is reported for the sake of brevity):
ApiResponse{success=true, message='', markets=[Market{marketName='BTC-2GIVE', high=1.1E-6, low=9.7E-7, volume=3499023.70109898},

How can I set My Json Value in Adapter

I Am Having two JsonArray in Which there is JsonObject I have Got the String of each value but the problem is that when i am passing i into adapter I am getting indexOutofbound exeption because my value are getting Store in my object class so can any one help me how can i send my data to Object so that i can inflate to recyclerView.
private void callola() {
progressDialog = new ProgressDialog(CabBookingActivity.this);
progressDialog.setMessage("Loading ...");
progressDialog.setCancelable(false);
progressDialog.show();
final RequestQueue queue = Volley.newRequestQueue(CabBookingActivity.this);
String url = "https://www.reboundindia.com/app/application/ola/ride_estimate.php";
StringRequest stringRequest = new StringRequest(Request.Method.POST, url,
new Response.Listener<String>() {
#Override
public void onResponse(String response) {
progressDialog.setCancelable(true);
progressDialog.dismiss();
Log.e("sushil Call ola response", response);
try {
JSONObject mainObj = new JSONObject(response);
arrayList = new ArrayList<>();
String result = mainObj.getString("result");
int i, j;
ArrayList categoriess, Ride;
if (result.equals("606")) {
JSONObject message = mainObj.getJSONObject("message");
categories = message.getJSONArray("categories");
ride_estimate = message.getJSONArray("ride_estimate");
// JSONArray ride_estimate = message.getJSONArray("ride_estimate");
for (i = 0; i < categories.length(); i++) {
Log.e("sushil", String.valueOf(i));
jsonObject = categories.getJSONObject(i);
id = jsonObject.getString("id");
display_name = jsonObject.getString("display_name");
image = jsonObject.getString("image");
eta = jsonObject.getString("eta");
Log.e("OutPut", id + " " + eta + " " + image + " " + amount_min + " " + amount_max);
}
for (j = 0; j < ride_estimate.length(); j++) {
Log.e("sushil", String.valueOf(j));
rideestimate = ride_estimate.getJSONObject(j);
distance = rideestimate.getString("distance");
amount_min = rideestimate.getString("amount_min");
amount_max = rideestimate.getString("amount_max");
category = rideestimate.getString("category");
}
}
OlaUberModel olaUberModel = new OlaUberModel(category, display_name, amount_min, eta, image, amount_max);
arrayList.add(olaUberModel);
Log.e("sushil ride_estimate", distance + " " + amount_min + " " + amount_max);
AdapterOlaUber adapterOlaUber = new AdapterOlaUber(context, arrayList, CabBookingActivity.this);
recyclerView.setAdapter(adapterOlaUber);
} catch (Exception e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
progressDialog.dismiss();
Log.e("error", error.toString());
}
}) {
#Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> params = new HashMap<>();
params.put("pickup_lat", "" + pickLat);
params.put("pickup_lng", "" + pickLong);
params.put("drop_lat", String.valueOf(dropLat));
params.put("drop_lng", String.valueOf(dropLong));
params.put("category", "all");
params.put("token", token);
Log.e("sushil param", String.valueOf(params));
return params;
}
};
stringRequest.setRetryPolicy(new DefaultRetryPolicy(
90000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
queue.add(stringRequest);
}
Here is my JSONRESPONSE
{
"result":"606",
"message":{
"categories":[
{
"id":"micro",
"display_name":"Micro",
"currency":"INR",
"distance_unit":"kilometre",
"time_unit":"minute",
"eta":5,
"distance":"0.7",
"ride_later_enabled":"true",
"image":"http:\/\/d1foexe15giopy.cloudfront.net\/micro.png",
"cancellation_policy":{
"cancellation_charge":50,
"currency":"INR",
"cancellation_charge_applies_after_time":5,
"time_unit":"minute"
},
"fare_breakup":[
{
"type":"flat_rate",
"minimum_distance":0,
"minimum_time":0,
"base_fare":50,
"minimum_fare":60,
"cost_per_distance":6,
"waiting_cost_per_minute":0,
"ride_cost_per_minute":1.5,
"surcharge":[
],
"rates_lower_than_usual":false,
"rates_higher_than_usual":false
}
]
},
{ },
{ },
{ },
{ },
{ },
{ },
{ },
{ }
],
"ride_estimate":[
{
"category":"prime_play",
"distance":3.99,
"travel_time_in_minutes":30,
"amount_min":155,
"amount_max":163,
"discounts":{
"discount_type":null,
"discount_code":null,
"discount_mode":null,
"discount":0,
"cashback":0
}
},
{ },
{ },
{ },
{ },
{ },
{ },
{ }
]
}
}
My Problem is that how can send the data in model.
My Model Should contain data Like id,displayName,amountMin,eta,image,amountMax

First of all you need to make two different models for category and ride_estimate.Because they both are in different loops. Also try this
for (j = 0; j < ride_estimate.length(); j++) {
Log.e("sushil", String.valueOf(j));
rideestimate = ride_estimate.getJSONObject(j);
distance = rideestimate.getString("distance");
amount_min = rideestimate.getString("amount_min");
amount_max = rideestimate.getString("amount_max");
category = rideestimate.getString("category");
OlaUberModel olaUberModel = new OlaUberModel(category, display_name, amount_min, eta, image, amount_max);
arrayList.add(olaUberModel);
}
May be this would helpful for you..
Thanks!

replace
eta = jsonObject.getString("eta");
by
int eta = jsonObject.getInt("eta");

On the basis of id of any cab type "prime" you can fetch image. what say

create some class as per your data
-----------------------------------com.example.CancellationPolicy.java-----------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class CancellationPolicy {
#SerializedName("cancellation_charge")
#Expose
private Integer cancellationCharge;
#SerializedName("currency")
#Expose
private String currency;
#SerializedName("cancellation_charge_applies_after_time")
#Expose
private Integer cancellationChargeAppliesAfterTime;
#SerializedName("time_unit")
#Expose
private String timeUnit;
public Integer getCancellationCharge() {
return cancellationCharge;
}
public void setCancellationCharge(Integer cancellationCharge) {
this.cancellationCharge = cancellationCharge;
}
public String getCurrency() {
return currency;
}
public void setCurrency(String currency) {
this.currency = currency;
}
public Integer getCancellationChargeAppliesAfterTime() {
return cancellationChargeAppliesAfterTime;
}
public void setCancellationChargeAppliesAfterTime(Integer cancellationChargeAppliesAfterTime) {
this.cancellationChargeAppliesAfterTime = cancellationChargeAppliesAfterTime;
}
public String getTimeUnit() {
return timeUnit;
}
public void setTimeUnit(String timeUnit) {
this.timeUnit = timeUnit;
}
}
-----------------------------------com.example.Category.java-----------------------------------
package com.example;
import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Category {
#SerializedName("id")
#Expose
private String id;
#SerializedName("display_name")
#Expose
private String displayName;
#SerializedName("currency")
#Expose
private String currency;
#SerializedName("distance_unit")
#Expose
private String distanceUnit;
#SerializedName("time_unit")
#Expose
private String timeUnit;
#SerializedName("eta")
#Expose
private Integer eta;
#SerializedName("distance")
#Expose
private String distance;
#SerializedName("ride_later_enabled")
#Expose
private String rideLaterEnabled;
#SerializedName("image")
#Expose
private String image;
#SerializedName("cancellation_policy")
#Expose
private CancellationPolicy cancellationPolicy;
#SerializedName("fare_breakup")
#Expose
private List<FareBreakup> fareBreakup = null;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getDisplayName() {
return displayName;
}
public void setDisplayName(String displayName) {
this.displayName = displayName;
}
public String getCurrency() {
return currency;
}
public void setCurrency(String currency) {
this.currency = currency;
}
public String getDistanceUnit() {
return distanceUnit;
}
public void setDistanceUnit(String distanceUnit) {
this.distanceUnit = distanceUnit;
}
public String getTimeUnit() {
return timeUnit;
}
public void setTimeUnit(String timeUnit) {
this.timeUnit = timeUnit;
}
public Integer getEta() {
return eta;
}
public void setEta(Integer eta) {
this.eta = eta;
}
public String getDistance() {
return distance;
}
public void setDistance(String distance) {
this.distance = distance;
}
public String getRideLaterEnabled() {
return rideLaterEnabled;
}
public void setRideLaterEnabled(String rideLaterEnabled) {
this.rideLaterEnabled = rideLaterEnabled;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public CancellationPolicy getCancellationPolicy() {
return cancellationPolicy;
}
public void setCancellationPolicy(CancellationPolicy cancellationPolicy) {
this.cancellationPolicy = cancellationPolicy;
}
public List<FareBreakup> getFareBreakup() {
return fareBreakup;
}
public void setFareBreakup(List<FareBreakup> fareBreakup) {
this.fareBreakup = fareBreakup;
}
}
-----------------------------------com.example.Discounts.java-----------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Discounts {
#SerializedName("discount_type")
#Expose
private Object discountType;
#SerializedName("discount_code")
#Expose
private Object discountCode;
#SerializedName("discount_mode")
#Expose
private Object discountMode;
#SerializedName("discount")
#Expose
private Integer discount;
#SerializedName("cashback")
#Expose
private Integer cashback;
public Object getDiscountType() {
return discountType;
}
public void setDiscountType(Object discountType) {
this.discountType = discountType;
}
public Object getDiscountCode() {
return discountCode;
}
public void setDiscountCode(Object discountCode) {
this.discountCode = discountCode;
}
public Object getDiscountMode() {
return discountMode;
}
public void setDiscountMode(Object discountMode) {
this.discountMode = discountMode;
}
public Integer getDiscount() {
return discount;
}
public void setDiscount(Integer discount) {
this.discount = discount;
}
public Integer getCashback() {
return cashback;
}
public void setCashback(Integer cashback) {
this.cashback = cashback;
}
}
-----------------------------------com.example.Example.java-----------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Example {
#SerializedName("result")
#Expose
private String result;
#SerializedName("message")
#Expose
private Message message;
public String getResult() {
return result;
}
public void setResult(String result) {
this.result = result;
}
public Message getMessage() {
return message;
}
public void setMessage(Message message) {
this.message = message;
}
}
-----------------------------------com.example.FareBreakup.java-----------------------------------
package com.example;
import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class FareBreakup {
#SerializedName("type")
#Expose
private String type;
#SerializedName("minimum_distance")
#Expose
private Integer minimumDistance;
#SerializedName("minimum_time")
#Expose
private Integer minimumTime;
#SerializedName("base_fare")
#Expose
private Integer baseFare;
#SerializedName("minimum_fare")
#Expose
private Integer minimumFare;
#SerializedName("cost_per_distance")
#Expose
private Integer costPerDistance;
#SerializedName("waiting_cost_per_minute")
#Expose
private Integer waitingCostPerMinute;
#SerializedName("ride_cost_per_minute")
#Expose
private Double rideCostPerMinute;
#SerializedName("surcharge")
#Expose
private List<Object> surcharge = null;
#SerializedName("rates_lower_than_usual")
#Expose
private Boolean ratesLowerThanUsual;
#SerializedName("rates_higher_than_usual")
#Expose
private Boolean ratesHigherThanUsual;
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public Integer getMinimumDistance() {
return minimumDistance;
}
public void setMinimumDistance(Integer minimumDistance) {
this.minimumDistance = minimumDistance;
}
public Integer getMinimumTime() {
return minimumTime;
}
public void setMinimumTime(Integer minimumTime) {
this.minimumTime = minimumTime;
}
public Integer getBaseFare() {
return baseFare;
}
public void setBaseFare(Integer baseFare) {
this.baseFare = baseFare;
}
public Integer getMinimumFare() {
return minimumFare;
}
public void setMinimumFare(Integer minimumFare) {
this.minimumFare = minimumFare;
}
public Integer getCostPerDistance() {
return costPerDistance;
}
public void setCostPerDistance(Integer costPerDistance) {
this.costPerDistance = costPerDistance;
}
public Integer getWaitingCostPerMinute() {
return waitingCostPerMinute;
}
public void setWaitingCostPerMinute(Integer waitingCostPerMinute) {
this.waitingCostPerMinute = waitingCostPerMinute;
}
public Double getRideCostPerMinute() {
return rideCostPerMinute;
}
public void setRideCostPerMinute(Double rideCostPerMinute) {
this.rideCostPerMinute = rideCostPerMinute;
}
public List<Object> getSurcharge() {
return surcharge;
}
public void setSurcharge(List<Object> surcharge) {
this.surcharge = surcharge;
}
public Boolean getRatesLowerThanUsual() {
return ratesLowerThanUsual;
}
public void setRatesLowerThanUsual(Boolean ratesLowerThanUsual) {
this.ratesLowerThanUsual = ratesLowerThanUsual;
}
public Boolean getRatesHigherThanUsual() {
return ratesHigherThanUsual;
}
public void setRatesHigherThanUsual(Boolean ratesHigherThanUsual) {
this.ratesHigherThanUsual = ratesHigherThanUsual;
}
}
-----------------------------------com.example.Message.java-----------------------------------
package com.example;
import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Message {
#SerializedName("categories")
#Expose
private List<Category> categories = null;
#SerializedName("ride_estimate")
#Expose
private List<RideEstimate> rideEstimate = null;
public List<Category> getCategories() {
return categories;
}
public void setCategories(List<Category> categories) {
this.categories = categories;
}
public List<RideEstimate> getRideEstimate() {
return rideEstimate;
}
public void setRideEstimate(List<RideEstimate> rideEstimate) {
this.rideEstimate = rideEstimate;
}
}
-----------------------------------com.example.RideEstimate.java-----------------------------------
package com.example;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class RideEstimate {
#SerializedName("category")
#Expose
private String category;
#SerializedName("distance")
#Expose
private Double distance;
#SerializedName("travel_time_in_minutes")
#Expose
private Integer travelTimeInMinutes;
#SerializedName("amount_min")
#Expose
private Integer amountMin;
#SerializedName("amount_max")
#Expose
private Integer amountMax;
#SerializedName("discounts")
#Expose
private Discounts discounts;
public String getCategory() {
return category;
}
public void setCategory(String category) {
this.category = category;
}
public Double getDistance() {
return distance;
}
public void setDistance(Double distance) {
this.distance = distance;
}
public Integer getTravelTimeInMinutes() {
return travelTimeInMinutes;
}
public void setTravelTimeInMinutes(Integer travelTimeInMinutes) {
this.travelTimeInMinutes = travelTimeInMinutes;
}
public Integer getAmountMin() {
return amountMin;
}
public void setAmountMin(Integer amountMin) {
this.amountMin = amountMin;
}
public Integer getAmountMax() {
return amountMax;
}
public void setAmountMax(Integer amountMax) {
this.amountMax = amountMax;
}
public Discounts getDiscounts() {
return discounts;
}
public void setDiscounts(Discounts discounts) {
this.discounts = discounts;
}
}
Now compile a library compile 'com.google.code.gson:gson:2.8.2'
then write few line to get your data fill in class
Gson gson = new Gson();
Example example = gson.fromJson(mainObj, Example.class);
Now you can try to fetch your categories like this
example.getCategories();

How to set Json string array to Java object using Java

I have following JSON string that I need to set to the Java objects of POJO class.
What method should I follow?
{"status":"FOUND","messages":null,"sharedLists": [{"listId":"391647d","listName":"/???","numberOfItems":0,"colla borative":false,"displaySettings":true}] }
I tried using Gson but it did not work for me.
Gson gson = new Gson();
SharedLists target = gson.fromJson(sb.toString(), SharedLists.class);
Following is my SharedLists pojo
public class SharedLists {
#SerializedName("listId")
private String listId;
#SerializedName("listName")
private String listName;
#SerializedName("numberOfItems")
private int numberOfItems;
#SerializedName("collaborative")
private boolean collaborative;
#SerializedName("displaySettings")
private boolean displaySettings;
public int getNumberOfItems() {
return numberOfItems;
}
public void setNumberOfItems(int numberOfItems) {
this.numberOfItems = numberOfItems;
}
public boolean isCollaborative() {
return collaborative;
}
public void setCollaborative(boolean collaborative) {
this.collaborative = collaborative;
}
public boolean isDisplaySettings() {
return displaySettings;
}
public void setDisplaySettings(boolean displaySettings) {
this.displaySettings = displaySettings;
}
public String getListId() {
return listId;
}
public void setListId(String listId) {
this.listId = listId;
}
}

Following is your JSON string.
{
"status": "FOUND",
"messages": null,
"sharedLists": [
{
"listId": "391647d",
"listName": "/???",
"numberOfItems": 0,
"colla borative": false,
"displaySettings": true
}
]
}
Clearly sharedLists is a JSON array within the outer JSON object.
So I have two classes as follows (created from http://www.jsonschema2pojo.org/ by providing your JSON as input)
ResponseObject - Represents the outer object
public class ResponseObject {
#SerializedName("status")
#Expose
private String status;
#SerializedName("messages")
#Expose
private Object messages;
#SerializedName("sharedLists")
#Expose
private List<SharedList> sharedLists = null;
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public Object getMessages() {
return messages;
}
public void setMessages(Object messages) {
this.messages = messages;
}
public List<SharedList> getSharedLists() {
return sharedLists;
}
public void setSharedLists(List<SharedList> sharedLists) {
this.sharedLists = sharedLists;
}
}
and the SharedList - Represents each object within the array
public class SharedList {
#SerializedName("listId")
#Expose
private String listId;
#SerializedName("listName")
#Expose
private String listName;
#SerializedName("numberOfItems")
#Expose
private Integer numberOfItems;
#SerializedName("colla borative")
#Expose
private Boolean collaBorative;
#SerializedName("displaySettings")
#Expose
private Boolean displaySettings;
public String getListId() {
return listId;
}
public void setListId(String listId) {
this.listId = listId;
}
public String getListName() {
return listName;
}
public void setListName(String listName) {
this.listName = listName;
}
public Integer getNumberOfItems() {
return numberOfItems;
}
public void setNumberOfItems(Integer numberOfItems) {
this.numberOfItems = numberOfItems;
}
public Boolean getCollaBorative() {
return collaBorative;
}
public void setCollaBorative(Boolean collaBorative) {
this.collaBorative = collaBorative;
}
public Boolean getDisplaySettings() {
return displaySettings;
}
public void setDisplaySettings(Boolean displaySettings) {
this.displaySettings = displaySettings;
}
}
Now you can parse the entire JSON string with GSON as follows
Gson gson = new Gson();
ResponseObject target = gson.fromJson(inputString, ResponseObject.class);
Hope this helps.

null values returning from gson.fromJson

I have some values in my object are returning by value null when converting from json to object and some others doesn't,i can't figure out why is that happening
here's my code to convert
OriginalMovie originalMovie = gson.fromJson(jsonString, OriginalMovie.class);
here's my json
{"page":1,
"results":[{"adult":false,
"backdrop_path":"/o4I5sHdjzs29hBWzHtS2MKD3JsM.jpg",
"genre_ids":[878,28,53,12],
"id":87101,"original_language":"en",
"original_title":"Terminator Genisys",
"overview":"The year is 2029. John Connor, leader of the resistance continues the war against the machines.",
"release_date":"2015-07-01",
"poster_path":"/5JU9ytZJyR3zmClGmVm9q4Geqbd.jpg",
"popularity":54.970301,
"title":"Terminator Genisys","video":false,
"vote_average":6.4,
"vote_count":197}],
"total_pages":11666,"total_results":233312}
and here's my base class (contains results)
package MovieReviewHelper;
import java.util.ArrayList;
import java.util.List;
public class OriginalMovie
{
private long page;
private List<Result> results = new ArrayList<Result>();
private long totalPages;
private long totalResults;
public long getPage()
{
return page;
}
public void setPage(long page)
{
this.page = page;
}
public List<Result> getResults()
{
return results;
}
public void setResults(List<Result> results)
{
this.results = results;
}
public long getTotalPages() {
return totalPages;
}
public void setTotalPages(long totalPages)
{
this.totalPages = totalPages;
}
public long getTotalResults()
{
return totalResults;
}
public void setTotalResults(long totalResults)
{
this.totalResults = totalResults;
}
}
and here's my other class
package MovieReviewHelper;
import java.util.ArrayList;
import java.util.List;
public class Result {
private boolean adult;
private String backdropPath;
private List<Long> genreIds = new ArrayList<Long>();
private long id;
private String originalLanguage;
private String originalTitle;
private String overview;
private String releaseDate;
private String posterPath;
private double popularity;
private String title;
private boolean video;
private double voteAverage;
private long voteCount;
public boolean isAdult()
{
return adult;
}
public void setAdult(boolean adult)
{
this.adult = adult;
}
public String getBackdropPath()
{
return backdropPath;
}
public void setBackdropPath(String backdropPath)
{
this.backdropPath = backdropPath;
}
public List<Long> getGenreIds()
{
return genreIds;
}
public void setGenreIds(List<Long> genreIds)
{
this.genreIds = genreIds;
}
public long getId()
{
return id;
}
public void setId(long id)
{
this.id = id;
}
public String getOriginalLanguage()
{
return originalLanguage;
}
public void setOriginalLanguage(String originalLanguage)
{
this.originalLanguage = originalLanguage;
}
public String getOriginalTitle()
{
return originalTitle;
}
public void setOriginalTitle(String originalTitle)
{
this.originalTitle = originalTitle;
}
public String getOverview()
{
return overview;
}
public void setOverview(String overview)
{
this.overview = overview;
}
public String getReleaseDate()
{
return releaseDate;
}
public void setReleaseDate(String releaseDate)
{
this.releaseDate = releaseDate;
}
public String getPosterPath()
{
return posterPath;
}
public void setPosterPath(String posterPath)
{
this.posterPath = posterPath;
}
public double getPopularity()
{
return popularity;
}
public void setPopularity(double popularity)
{
this.popularity = popularity;
}
public String getTitle()
{
return title;
}
public void setTitle(String title)
{
this.title = title;
}
public boolean isVideo()
{
return video;
}
public void setVideo(boolean video)
{
this.video = video;
}
public double getVoteAverage()
{
return voteAverage;
}
public void setVoteAverage(double voteAverage)
{
this.voteAverage = voteAverage;
}
public long getVoteCount()
{
return voteCount;
}
public void setVoteCount(long voteCount)
{
this.voteCount = voteCount;
}
}

Your Json and Class variables should have the same name.
backdrop_path in Json and backdropPath in class would not work

Incase this helps for someone like me who spent half a day in trying to figure out a similar issue with gson.fromJson() returning object with null values, but when using #JsonProperty with an underscore in name and using Lombok in the model class.
My model class had a property like below and am using Lombok #Data for class
#JsonProperty(value="dsv_id")
private String dsvId;
So in my Json file I was using
"dsv_id"="123456"
Which was causing null value. The way I resolved it was changing the Json to have below ie.without the underscore. That fixed the problem for me.
"dsvId = "123456"

Develop Reference

Java is a programming language and computing platform first released by Sun Microsystems in 1995.

Receive array of objects in JSON by Spring Boot RestApi Controller - java

Related

How can I parse object inside array using retrofit

Json Get Request using retrofit won't work

How can I set My Json Value in Adapter

How to set Json string array to Java object using Java

null values returning from gson.fromJson

Categories

Resources