Develop Reference

How can i deserialize this JSON

This is my JSON data i want to parse but am still new in deserialization, i want to get the following Attributes from this JSON data :
1.AirportCode.
2.Latutude.
3.Longitude.
This is the JSON containing two lists of the Airports.
{
"AirportResource": {
"Airports": {
"Airport": [{
"AirportCode": "AAL",
"Position": {
"Coordinate": {
"Latitude": 57.09305556,
"Longitude": 9.85
}
},
"CityCode": "AAL",
"CountryCode": "DK",
"LocationType": "Airport",
"Names": {
"Name": [{
"#LanguageCode": "xx",
"$": "Aalborg"
}, {
"#LanguageCode": "de",
"$": "Aalborg"
}, {
"#LanguageCode": "ru",
"$": "Ольборг"
}, {
"#LanguageCode": "pt",
"$": "Aalborg"
}, {
"#LanguageCode": "jp",
"$": "オールボア"
}, {
"#LanguageCode": "kr",
"$": "올보르그"
}, {
"#LanguageCode": "en",
"$": "Aalborg"
}, {
"#LanguageCode": "it",
"$": "Aalborg"
}, {
"#LanguageCode": "fr",
"$": "Aalborg"
}, {
"#LanguageCode": "es",
"$": "Aalborg"
}, {
"#LanguageCode": "ka",
"$": "奧爾堡"
}, {
"#LanguageCode": "pl",
"$": "Aalbork"
}, {
"#LanguageCode": "mi",
"$": "奥尔堡"
}]
},
"UtcOffset": 2,
"TimeZoneId": "Europe\/Copenhagen"
}, {
"AirportCode": "AAR",
"Position": {
"Coordinate": {
"Latitude": 56.30388889,
"Longitude": 10.62
}
},
"CityCode": "AAR",
"CountryCode": "DK",
"LocationType": "Airport",
"Names": {
"Name": [{
"#LanguageCode": "xx",
"$": "Aarhus"
}, {
"#LanguageCode": "en",
"$": "Aarhus"
}, {
"#LanguageCode": "de",
"$": "Aarhus"
}, {
"#LanguageCode": "it",
"$": "Aarhus"
}, {
"#LanguageCode": "fr",
"$": "Aarhus"
}, {
"#LanguageCode": "es",
"$": "Aarhus"
}]
},
"UtcOffset": 2,
"TimeZoneId": "Europe\/Copenhagen"
}]
},
"Meta": {
"#Version": "1.0.0",
"Link": [{
"#Href": "https:\/\/api.lufthansa.com\/v1\/references\/airports\/?limit=2&LHoperated=0&offset=0",
"#Rel": "self"
}, {
"#Href": "https:\/\/api.lufthansa.com\/v1\/references\/airports\/?limit=2&LHoperated=0&offset=2",
"#Rel": "next"
}, {
"#Href": "https:\/\/api.lufthansa.com\/v1\/references\/airports\/?limit=2&LHoperated=0&offset=1260",
"#Rel": "last"
}, {
"#Href": "https:\/\/api.lufthansa.com\/v1\/references\/cities\/{cityCode}",
"#Rel": "related"
}, {
"#Href": "https:\/\/api.lufthansa.com\/v1\/references\/countries\/{countryCode}",
"#Rel": "related"
}],
"TotalCount": 1261
}
}
}
Then my Java code:
EDITTED:
private void parseJson(String result)
{
try {
if (result!=null) {
JSONObject obj = new JSONObject(result).getJSONObject("AirportResource").getJSONObject("Airports");
JSONArray arr = obj.getJSONArray("Airport");
for (int i = 0; i < arr.length(); i++)
{
String AirportCode = arr.getJSONObject(i).getString("AAL");
String Latitude = arr.getJSONObject(i).getJSONObject("Position").getJSONObject("Coordinate").getString("Latitude");
String Longitude = arr.getJSONObject(i).getJSONObject("Position").getJSONObject("Coordinate").getString("Longitude");
System.out.println("Airport : " + AirportCode + " Latitude: " + Latitude+
" Longitude : " + Longitude );
}
}
else{
Toast.makeText(MainActivity.this,Config.POOR_NETWORK_CONNECTION, Toast.LENGTH_LONG).show();
}
}
catch (JSONException r){
System.out.println("ERROR PROB : "+ r);
}
}
The exception am getting is :
org.json.JSONException: No value for AirportResource
How can i parse this JSON kind of Data?

This will HOPEFULLY get you started.
private static void parseJson(JSONObject object) throws JSONException {
if (object!=null) {
JSONObject airportResource = object.getJSONObject("AirportResource");
JSONObject airports = airportResource.getJSONObject("Airports");
JSONArray airportArray = airports.getJSONArray("Airport");
for (int i = 0 ; i < airportArray.length(); i++) {
JSONObject airport = (JSONObject) airportArray.get(i);
//System.out.println(airport);
System.out.println("CityCode: " + airport.getString("CityCode"));
}
}
else{
//null
}
}
The output will be:
CityCode: AAL
CityCode: AAR

You didnt take the object of Airports. Inside Airports object is the Airport array and you are directly accessing it. Hence throwing error.
JSONObject obj2 = obj.getJSONObject("Airports");
Now get Json Array from obj
JsonArray jsonarray= obj2.getJsonArray("Airport");
Use the for loop on jsonarray's length now.

I recommend using this tool to view and formate your JSON properly.
this is the result
from here you could easily resolve your problem
JSONObject AirportResource= obj.getJSONObject("AirportResource");
JsonArray AirPorts= AirportResource.getJSONObject("Airports");
JsonArray jsonarray= AirPorts.getJsonArray("Airport");
for (int i = 0; i < jsonarray.length(); i++) {
JSONObject obj= AirportResource.get(i); do sth with it
obj.getString("key"); //do sth with it
}

how to parse the json response which starts with an array

response:
[
{
"id": "e9299032e8a34d168def176af7d62da3",
"createdAt": "Nov 8, 2017 9:46:40 AM",
"model": {
"id": "eeed0b6733a644cea07cf4c60f87ebb7",
"name": "color",
"app_id": "main",
"created_at": "May 11, 2016 11:35:45 PM",
"model_version": {}
},
"input": {
"id": "df6eae07cd86483f811c5a2202e782eb",
"data": {
"concepts": [],
"metadata": {},
"image": {
"url": "http://www.sachinmittal.com/wp-content/uploads/2017/04/47559184-image.jpg"
}
}
},
"data": [
{
"hex": "#f59b2d",
"webSafeHex": "#ffa500",
"webSafeColorName": "Orange",
"value": 0.0605
},
{
"hex": "#3f1303",
"webSafeHex": "#000000",
"webSafeColorName": "Black",
"value": 0.2085
},
{
"hex": "#a33303",
"webSafeHex": "#8b0000",
"webSafeColorName": "DarkRed",
"value": 0.3815
},
{
"hex": "#000000",
"webSafeHex": "#000000",
"webSafeColorName": "Black",
"value": 0.34275
},
{
"hex": "#f7ce93",
"webSafeHex": "#ffdead",
"webSafeColorName": "NavajoWhite",
"value": 0.00675
}
],
"status": {}
}
]
need to parse this reponse in json. Please help me out.

You can try something like this..
try{
JSONArray array= new JSONArray(Yourresponse);
for(int i=0; i<=array.length();i++){
JSONObject jsonObject=array.getJSONObject(i);
String id= jsonObject.getString("id");
String created_at= jsonObject.getString("createdAt");
String model_id = jsonObject.getJSONObject("model").getString("id");
String app_id=jsonObject.getJSONObject("model").getString("app_id");
//So On... Depends on your requirements. It's just an idea!
}
}
catch (Exception e){
e.printStackTrace();
}

JSON content from file via Java

My program parse JSON from file where is saved unstructured content of this json adress.
Unstructured json format from file json.txt:
{"total":3307,"watershed":100,"maxPage":5,"search":"http://10.103.80.149:3312/bin/sp?app=pinglun&outfmt=json&seek_timeout=400&gmt_create=1465228800~&validfeedback=1&item_id=538236063692&rate=1&layer_quota=500000&status=0,-1&order=algo_sort:des&s=0&n=20&is_wireless=0&user_id=0&utd_id=ba3290d86b9fdcd927e8ae83fde1ee64&is_click_sku=0","currentPageNum":1,"comments":[{"auction":{"title":"","thumbnail":""....
For better view in structured form:
{
"total": 3307,
"watershed": 100,
"maxPage": 5,
"search": "http://10.103.80.162:3312/bin/sp?app=pinglun&outfmt=json&seek_timeout=400&gmt_create=1465228800~&validfeedback=1&item_id=538236063692&rate=1&layer_quota=500000&status=0,-1&order=algo_sort:des&s=0&n=20&is_wireless=0&user_id=0&is_click_sku=0",
"currentPageNum": 1,
"comments": [
{
"auction": {
"title": "",
"thumbnail": "",
"aucNumId": "538236063692",
"link": "//item.taobao.com/item.htm?id=538236063692",
"auctionPic": "//img.alicdn.com/bao/uploaded/null_40x40.jpg",
"sku": "机身颜色:黑色（顶级配置）[移动+联通] &nbsp套餐类型:官方标配 &nbsp存储容量:64MB &nbsp版本类型:中国大陆"
},
"promotionType": "活动促销 ",
"enableSNS": false,
"tag": "",
"appendCanExplainable": false,
"showCuIcon": true,
"validscore": 1,
"award": "",
"noQna": true,
"appendList": [
{
"photos": [
],
"content": "老人机使用效果好，功能强大，非常值得拥有！！！",
"vicious": "",
"reply": null,
"show": true,
"dayAfterConfirm": 0,
"appendId": 290673146633
}
],
"from": "",
"date": "2016年11月05日 16:46",
"dayAfterConfirm": 0,
"bidPriceMoney": {
"cent": 7905,
"amount": 79.05,
"currencyCode": "CNY",
"centFactor": 100,
"displayUnit": "元",
"currency": {
"defaultFractionDigits": 2,
"currencyCode": "CNY",
"symbol": "￥"
}
},
"rate": "1",
"o2oRate": null,
"propertiesAvg": "0.0",
"showDepositIcon": false,
"rateId": 290589793921,
"creditFraudRule": 0,
"useful": 0,
"reply": null,
"append": {
"photos": [
],
"content": "老人机使用效果好，功能强大，非常值得拥有！！！",
"vicious": "",
.
.
.
.}
And I need to parse only chinese comments in element "content" e.g. "老人机使用效果好，功能强大，非常值得拥有！！！", but I don't know how to works with this element in JSONArray with json-simple.
Here is example of code:
public class Final {
public static void main(String[] args) throws IOException, JSONException {
String jsonData = "";
BufferedReader br = null;
try {
String line;
br = new BufferedReader(new FileReader("json.txt"));
while ((line = br.readLine()) != null) {
jsonData += line + "\n";
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (br != null)
br.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
System.out.println("\nFile Content: \n" + jsonData1); // displays all content
JSONObject obj = new JSONObject(jsonData);
System.out.println("search: " + obj.getString("search"));
System.out.println("comments: " + obj.getJSONObject("comments"));
}
}
Could you please help me with this problem?

How get array value from nested json data (java android)

I've got the title, author, and published date from json data to my android app.
I'm trying to get event_start_date and event_location, but failed. can anyone help me how I can get it?
Json:
{
"status": "ok",
"count": 1,
"count_total": 29,
"pages": 29,
"posts": [
{
"id": 2815,
"type": "event",
"slug": "itb-integrated-career-days",
"url": "http://example.com/event/itb-integrated-career-days/",
"status": "publish",
"title": "Title",
"title_plain": "Title",
"content": "<p>test</p>\n",
"excerpt": "<p>test […]</p>\n",
"date": "2015-09-25 01:09:40",
"modified": "2015-09-29 22:52:35",
"categories": [],
"tags": [],
"author": {
"id": 1,
"slug": "john",
"name": "john",
"first_name": "",
"last_name": "",
"nickname": "john",
"url": "",
"description": ""
},
"comments": [],
"attachments": [
{
"id": 2817,
"url": "http://example.com/wp-content/uploads/2015/09/bannertkt102015.gif",
"slug": "bannertkt102015",
"title": "bannertkt102015",
"description": "",
"caption": "",
"parent": 2815,
"mime_type": "image/gif",
"images": {
"full": {
"url": "http://example.com/wp-content/uploads/2015/09/bannertkt102015.gif",
"width": 1000,
"height": 563
},
"thumbnail": {
"url": "http://example.com/wp-content/uploads/2015/09/bannertkt102015-150x150.gif",
"width": 150,
"height": 150
},
"medium": {
"url": "http://example.com/wp-content/uploads/2015/09/bannertkt102015-300x169.gif",
"width": 300,
"height": 169
},
"large": {
"url": "http://example.com/wp-content/uploads/2015/09/bannertkt102015.gif",
"width": 1000,
"height": 563
},
"blog-default": {
"url": "http://example.com/wp-content/uploads/2015/09/bannertkt102015-806x300.gif",
"width": 806,
"height": 300
}
}
},
{
"id": 2818,
"url": "http://example.com/wp-content/uploads/2015/09/2015-09-25_012008.jpg",
"slug": "2015-09-25_012008",
"title": "2015-09-25_012008",
"description": "",
"caption": "",
"parent": 2815,
"mime_type": "image/jpeg",
"images": {
"full": {
"url": "http://example.com/wp-content/uploads/2015/09/2015-09-25_012008.jpg",
"width": 589,
"height": 529
},
"thumbnail": {
"url": "http://example.com/wp-content/uploads/2015/09/2015-09-25_012008-150x150.jpg",
"width": 150,
"height": 150
},
"medium": {
"url": "http://example.com/wp-content/uploads/2015/09/2015-09-25_012008-300x269.jpg",
"width": 300,
"height": 269
},
"large": {
"url": "http://example.com/wp-content/uploads/2015/09/2015-09-25_012008.jpg",
"width": 589,
"height": 529
},
"blog-default": {
"url": "http://example.com/wp-content/uploads/2015/09/2015-09-25_012008-589x300.jpg",
"width": 589,
"height": 300
}
}
}
],
"comment_count": 0,
"comment_status": "open",
"thumbnail": "http://example.com/wp-content/uploads/2015/09/2015-09-25_012008-150x150.jpg",
"custom_fields": {
"event_location": [
"New York"
],
"event_start_date": [
"10/23/2015"
],
"event_start_time": [
"09:00 AM"
],
"event_start_date_number": [
"1445590800"
],
"event_address_country": [
"US"
],
"event_address_state": [
"Jawdst"
],
"event_address_city": [
"New York"
],
"event_address_address": [
"Gedung Sasana Budaya Ganesha (Sabuga) Jalan Tamansari 73, New York"
],
"event_address_zip": [
"42132"
],
"event_phone": [
"5345"
],
"post_views_count": [
"23"
]
}
}
]
}
And my function
public void parseJson(JSONObject json) {
try {
info.pages = json.getInt("pages");
// parsing json object
if (json.getString("status").equalsIgnoreCase("ok")) {
JSONArray posts = json.getJSONArray("posts");
info.feedList = new ArrayList<PostItem>();
for (int i = 0; i < posts.length(); i++) {
Log.v("INFO",
"Step 3: item " + (i + 1) + " of " + posts.length());
try {
JSONObject post = (JSONObject) posts.getJSONObject(i);
PostItem item = new PostItem();
item.setTitle(Html.fromHtml(post.getString("title"))
.toString());
item.setDate(post.getString("date"));
item.setId(post.getInt("id"));
item.setUrl(post.getString("url"));
item.setContent(post.getString("content"));
if (post.has("author")) {
Object author = post.get("author");
if (author instanceof JSONArray
&& ((JSONArray) author).length() > 0) {
author = ((JSONArray) author).getJSONObject(0);
}
if (author instanceof JSONObject
&& ((JSONObject) author).has("name")) {
item.setAuthor(((JSONObject) author)
.getString("name"));
}
}
if (post.has("tags") && post.getJSONArray("tags").length() > 0) {
item.setTag(((JSONObject) post.getJSONArray("tags").get(0)).getString("slug"));
}
// TODO do we dear to remove catch clause?
try {
boolean thumbnailfound = false;
if (post.has("thumbnail")) {
String thumbnail = post.getString("thumbnail");
if (thumbnail != "") {
item.setThumbnailUrl(thumbnail);
thumbnailfound = true;
}
}
if (post.has("attachments")) {
JSONArray attachments = post
.getJSONArray("attachments");
// checking how many attachments post has and
// grabbing the first one
if (attachments.length() > 0) {
JSONObject attachment = attachments
.getJSONObject(0);
item.setAttachmentUrl(attachment
.getString("url"));
// if we do not have a thumbnail yet, get
// one now
if (attachment.has("images")
&& !thumbnailfound) {
JSONObject thumbnail;
if (attachment.getJSONObject("images")
.has("post-thumbnail")) {
thumbnail = attachment
.getJSONObject("images")
.getJSONObject(
"post-thumbnail");
item.setThumbnailUrl(thumbnail
.getString("url"));
} else if (attachment.getJSONObject(
"images").has("thumbnail")) {
thumbnail = attachment
.getJSONObject("images")
.getJSONObject("thumbnail");
item.setThumbnailUrl(thumbnail
.getString("url"));
}
}
}
}
} catch (Exception e) {
Log.v("INFO",
"Item "
+ i
+ " of "
+ posts.length()
+ " will have no thumbnail or image because of exception!");
e.printStackTrace();
}
if (item.getId() != info.ignoreId)
info.feedList.add(item);
} catch (Exception e) {
Log.v("INFO", "Item " + i + " of " + posts.length()
+ " has been skipped due to exception!");
e.printStackTrace();
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
}

This should do it
JSONObject custom_fields = post.getJSONObject("custom_fields");
JSONArray event_start_date_array = custom_fields.getJSONArray("event_start_date");
JSONArray event_location_array = custom_fields.getJSONArray("event_location");
String event_start_date = event_start_date_array.getString(0);
String event_location = event_location_array.getString(0);

How to read a JSON file in Java using org.json.simple package

I am going to get facebook read_books
The file is in this format:
{
"data": [
{
"id": "270170479804513",
"from": {
"name": "L I",
"id": "1000022"
},
"start_time": "2014-01-22T09:31:00+0000",
"publish_time": "2014-01-22T09:31:00+0000",
"application": {
"name": "Books",
"id": "174275722710475"
},
"data": {
"book": {
"id": "133556360140246",
"url": "https://www.facebook.com/pages/Pride-and-Prejudice/133556360140246",
"type": "books.book",
"title": "Pride and Prejudice"
}
},
"type": "books.reads",
"no_feed_story": false,
"likes": {
"count": 0,
"can_like": true,
"user_likes": false
},
"comments": {
"count": 0,
"can_comment": true,
"comment_order": "chronological"
}
},
{
"id": "270170328",
"from": {
"name": "h",
"id": "100004346894022"
},
"start_time": "2014-01-22T09:29:42+0000",
"publish_time": "2014-01-22T09:29:42+0000",
"application": {
"name": "Books",
"id": "174275722710475"
},
"data": {
"book": {
"id": "104081659627680",
"url": "https://www.facebook.com/pages/Gulistan-of-Sadi/104081659627680",
"type": "books.book",
"title": "Gulistan of Sa'di"
}
},
"type": "books.reads",
"no_feed_story": false,
"likes": {
"count": 0,
"can_like": true,
"user_likes": false
},
"comments": {
"count": 0,
"can_comment": true,
"comment_order": "chronological"
}
}
],
I need books titles and their URL. I run the below code but I get Exception in thread "main" java.lang.ClassCastException: org.json.simple.JSONObject cannot be cast to java.lang.String
while ((inputLine = in.readLine()) != null)
{
s = s + inputLine + "\r\n";
if (s == null) {
break;
}
t = t + inputLine + "\r\n";
}
in.close();
t = t.substring(0, t.length() - 2);
System.out.println(t);
Object dataObj =JSONValue.parse(t);
System.out.println(dataObj);
JSONObject dataJson = (JSONObject) dataObj;
JSONArray data = (JSONArray) dataJson.get("data");
for (Object o: data)
{
JSONObject indata= (JSONObject) o;
Object indatafirst=(JSONObjec`enter code here`t).get("0");
String inndata=(String) indatafirst.get("data");
System.out.println("inndata"+inndata);
}}
but it is not true

The problem is with the following line:
String inndata=(String) indatafirst.get("data");
The data field in the JSON is not a String, it's a nested JSON object.
"data": {
"book": {
"id": "104081659627680",
"url": "https://www.facebook.com/pages/Gulistan-of-Sadi/104081659627680",
"type": "books.book",
"title": "Gulistan of Sa'di"
}
}
This explains your ClassCastException.
Instead you should do something like:
JSONObject data = (JSONObject) indatafirst.get("data");
JSONObject book = (JSONObject) data.get("book");
String bookTitle = book.get("title");