In my project I have an int jsonobject by 20 value. To get the int value I used this:
model.setInt(jsonObject.getInt("price"));
Now it returns 0 value for price. How can I get real value?
Here is My out put Json:
"data": [
{
"id": "571dd7817f8b9a1c190bbdb5",
"goods": 0,
"rate": {
"r1": 0
},
"price": 20
}
Please look at the example:
String jsonData = "{\"count\": 20}";
JSONObject obj = new JSONObject(jsonData);
System.out.println("Count: " + obj.getInt("count"));
Your JSON is invalid. you can use online tools like the jsonformatter to test the validity of your JSON.
Maybe try something like:
{
"data": [
{
"id": "571dd7817f8b9a1c190bbdb5",
"goods": 0,
"rate": {"r1": 0},
"price": 20
}
]
}
Looking at your code, you may have better luck with this structure:
{
"id": "571dd7817f8b9a1c190bbdb5",
"goods": 0,
"rate": {"r1": 0},
"price": 20
}
Related
orderHDRObjectList contains hdrObject table deatils and orderDETObjList contains orderDetails table list
this is a valid jason and i want to implement this.
and display orderHdrObjList of orderId=1 and corresponding orderDETObjList of orderId=1 and so on..
how can I do that?
{
"orderObj": {
"orderHDRObjList": {
"hdrObject": [{
"orderID": 1,
"customerName": "Alex",
"address": "Kottayam",
"totalPrice": 250,
"orderDate": "2020-11-21"
},
{
"orderID": 2,
"customerName": "Aljin",
"address": "Kochi",
"totalPrice": 250,
"orderDate": "2020-11-21"
}
]
},
"orderDETObjList": {
"1": [{
"productId": 2,
"productQty": 250,
"price": 500
},
{
"productId": 3,
"productQty": 150,
"price": 300
}
],
"2": [{
"productId": 2,
"productQty": 250,
"price": 500
},
{
"productId": 3,
"productQty": 150,
"price": 300
}
]
}
}
}
solution 1: use jackson explained here for converting your model to json: Converting Java objects to JSON with Jackson
solution 2:
use java classes: JSONObject and JSONArray
*needs
import org.json.JSONArray;
import org.json.JSONObject;
e.g:
JSONObject json = new JSONObject();
json.put("key1", "value1");
JSONArray array = new JSONArray();
array.put(1);
array.put(2);
json.put("numbers", array);
the output will be this
{
"key1": "value1",
"numbers": [
1,
2
]
}
to convert your java json object to a string use toString() method
System.out.println(json.toString());
some IDEs like IntelliJ suggests to put your json codes inside a try...catch because it may produce some Exceptions when you want to read data with a wrong index.
I get data from an API in which the JSON object changes randomly, like if it is at "position": 1, now it will change randomly to "number": 1. So, how can I check in my application if the object is at "position": 1 or "number": 1 and use it as int?
JSON :-
{
"now": [{
"time": {
"starts_in": 0,
"ends_in": 79580,
"starts_at": 0,
"ends_at": "2018-01-21T08:00:00.788Z"
},
"coins": {
"free": 8,
"first_win": 16,
"max": 52,
"collected": 0
},
"unk1": -88317689,
"position": 1,
"xp_multiplier": 0,
"location_scid": {
"scid_type": 15,
"scid_id": 1
},
"tid": "TID_WANTED_3",
"location": "Terre",
"mode": {
"name": "Bty",
"color": "#0884FA",
"description": " The team wins!"
},
"unk4": 0,
"info": "",
"unk5": 0,
"unk6": 0
}, {
"time": {
"starts_in": 0,
"ends_in": 36380,
"starts_at": 0,
"ends_at": "2018-01-20T20:00:00.788Z"
},
"coins": {
"free": 24,
"first_win": 0,
"max": 32,
"collected": 0
}
}],
"later": [{
"time": {
"starts_in": 79580,
"ends_in": 165980,
"starts_at": "2018-01-21T08:00:00.788Z",
"ends_at": "2018-01-22T08:00:00.788Z"
},
"coins": {
"free": 8,
"first_win": 16,
"max": 52,
"collected": 0
},
"unk1": -88217689,
"position": 1,
"xp_multiplier": 0,
"location_scid": {
"scid_type": 15,
"scid_id": 7
},
"tid": "TID_GOLDRUSH_1",
"location": "Mine",
"mode": {
"name": "Grab",
"color": "#AA57CF",
"description": " An. "
}
}]
}
Thanks in advance :)
JSONObject c = //Your jsonObject;
String position = c.getInt("position");
String number = c.getInt("number");
if(position!=null){
//TODO You know it is position and it's int value
}else if(number!=null){
//TODO You know it is number and it's int value
}else{
//TODO Its neither of two
}
If you're using Gson to convert your JSON to a class, you can use both position and number as attributes for your destination class.
After that, check which one is null and which one is not and use that is not null as your number.
Just try this one,
JSONObject object = (Your jsonObject);
if(object.has("position")){
** do your code here **
}else if(object.has("number"){
** do your code here **
}
I can get other fields correctly, but can parse the "title" or "title_full" values. I always receives an empty string. I am using the org.json library. This is the json. What's the trick?
try {
title = jsonDoc.getString("title_full");
} catch (JSONException e) {
log.info("no full title: " + docString);
}
{
"organizations": [],
"uuid": "d0adc516c9012113774557365f9847da99b228e7",
"thread": {
"site_full": "www.fark.com",
"main_image": "http://img.fark.net/images/cache/orig/5/51/fark_514Jh7VFpynQw4MyN2xcK1jwCxk.png?t=RQrnhq8EGZiUuElMitgLOQ&f=1488776400",
"site_section": "http://www.fark.com/discussion/",
"section_title": "FARK.com: Discussion links",
"url": "http://www.fark.com/comments/9500577/I-want-to-support-work-that-NY-Times-Washington-Post-are-doing-I-can-only-afford-one-subscription-Who-do-you-recommend-I-throw-my-support-to?cpp=1",
"country": "US",
"domain_rank": 3382,
"title": "(9500577) I want to support the work that the NY Times and Washington Post are doing. I can only afford one subscription. Who do you recommend I throw my support to?",
"performance_score": 0,
"site": "fark.com",
"participants_count": 31,
"title_full": "FARK.com: (9500577) I want to support the work that the NY Times and Washington Post are doing. I can only afford one subscription. Who do you recommend I throw my support to?",
"spam_score": 0.0,
"site_type": "discussions",
"published": "2017-03-03T12:00:00.000+02:00",
"replies_count": 2,
"uuid": "67213179a24931106e75cd588386bd30fb3bbdc8"
},
"author": "EbolaNYC",
"url": "http://www.fark.com/comments/9500577/I-want-to-support-work-that-NY-Times-Washington-Post-are-doing-I-can-only-afford-one-subscription-Who-do-you-recommend-I-throw-my-support-to?cpp=1#c107765048",
"ord_in_thread": 1,
"title": "",
"locations": [],
"entities": {
"persons": [],
"locations": [],
"organizations": []
},
"highlightText": "",
"language": "english",
"persons": [],
"text": "dionysusaur : Either the NY Post or the WA Times.\nOnly asshats read the NY Post.",
"external_links": [],
"published": "2017-03-03T15:58:00.000+02:00",
"crawled": "2017-03-03T17:05:26.049+02:00",
"highlightTitle": "",
"social": {
"gplus": {"shares": 0},
"pinterest": {"shares": 0},
"vk": {"shares": 0},
"linkedin": {"shares": 0},
"facebook": {"likes": 0, "shares": 0, "comments": 0},
"stumbledupon": {"shares": 0}
}
}
Your JSON seems like follows:
{
{
"main": {
"key": "value",
},
},
}
So, First fetch the main json and then the key.
Code should be like as follows:
String something = jsonDoc.get("main").get("key").toString();
There are two title values in your JSON, Do check which title you need before fetching.
After I formatted the json code, the problem becomes obvious:
title_full is only available inside the thread node, and a non-empty title is also only inside the thread node. So you'll first have to access the thread node and then access title and title_full inside that node.
Using the org.json library, you can access the fields like this:
String fullTitle = jsonDoc.getJSONObject("thread").getString("title_full");
If you take a look at the json you will see that the "title" and "title_full" fields are in the thread field.
So try reading that field and then parsing the filed into a new jsonObject and you should be able to get them.
I have a JSON source with more empty_slots elements (in the example exist below only one, but in the reality exist more stations with empty_slots). How can I sum the values from empty_slots and return as double? Thanks!
JAVA
public static double getValueFromJSONString(String jString) throws JSONException
{
JSONObject json = new JSONObject(jString);
return json.getJSONObject("empty_bikes").getDouble(jString);
}
JSON
{"network": {
"company": [
"Gewista Werbegesellschaft m.b.H"
],
"id": "citybike-wien",
"location": {
"city": "Wien",
},
"stations": [
{
"empty_slots": 3,
"extra": {
"slots": "26",
},
"free_bikes": 23
}]}
Checkout JsonPath. Below code is not tested but should work with RestAssured dependency - https://github.com/rest-assured/rest-assured
JsonPath jsonPath = new JsonPath(jsonString);
List<Integer> companyEntityIds = jsonPath.getList("network.stations.empty_slots");
Once you have the array you can just use a stream or whatever to add these up.
Im requesting data from instagram api when I search for any tag. In return I get a massive chunk of json data corresponding to like 20 pictures. The response below is the chunk I used to generate my pojos online
{
"pagination": {
"next_max_tag_id": "1193052000552992097",
"deprecation_warning": "next_max_id and min_id are deprecated for this endpoint; use min_tag_id and max_tag_id instead",
"next_max_id": "1193052000552992097",
"next_min_id": "1193052554319844057",
"min_tag_id": "1193052554319844057",
"next_url": "https://api.instagram.com/v1/tags/cats/media/recent?access_token=631477962.1fb234f.f7c5cda97c7f4df983b1c764f066ed37&max_tag_id=1193052000552992097"
},
"meta": {
"code": 200
},
"data": [
{
"attribution": null,
"tags": [
"cats",
"caseworker",
"homestuck"
],
"type": "image",
"location": null,
"comments": {
"count": 0,
"data": []
},
"filter": "Normal",
"created_time": "1456442969",
"link": "https://www.instagram.com/p/BCOkvoim1LZ/",
"likes": {
"count": 0,
"data": []
},
"images": {
"low_resolution": {
"url": "https://scontent.cdninstagram.com/t51.2885-15/s320x320/e35/12729405_224148847934280_1450226662_n.jpg?ig_cache_key=MTE5MzA1MjU1NDMxOTg0NDA1Nw%3D%3D.2",
"width": 320,
"height": 320
},
"thumbnail": {
"url": "https://scontent.cdninstagram.com/t51.2885-15/s150x150/e35/12729405_224148847934280_1450226662_n.jpg?ig_cache_key=MTE5MzA1MjU1NDMxOTg0NDA1Nw%3D%3D.2",
"width": 150,
"height": 150
},
"standard_resolution": {
"url": "https://scontent.cdninstagram.com/t51.2885-15/s640x640/sh0.08/e35/12729405_224148847934280_1450226662_n.jpg?ig_cache_key=MTE5MzA1MjU1NDMxOTg0NDA1Nw%3D%3D.2",
"width": 640,
"height": 640
}
},
"users_in_photo": [],
"caption": {
"created_time": "1456442969",
"text": "Bitch! I'm fabulous! That's my case worker..she is obsessed with cats\n\n#cats #caseworker #homestuck",
"from": {
"username": "strider_inc",
"profile_picture": "https://scontent.cdninstagram.com/t51.2885-19/s150x150/12558836_953196128050469_1739102_a.jpg",
"id": "2322171747",
"full_name": "WE All 4EVER KAWAII TRASH GODS"
},
"id": "1193052563471815092"
},
"user_has_liked": false,
"id": "1193052554319844057_2322171747",
"user": {
"username": "strider_inc",
"profile_picture": "https://scontent.cdninstagram.com/t51.2885-19/s150x150/12558836_953196128050469_1739102_a.jpg",
"id": "2322171747",
"full_name": "WE All 4EVER KAWAII TRASH GODS"
}
}
So when I do that I get like 10-12 different pojo classes into which I should map this data. Now firstly...Im just trying that out and Im 100% Ill have some problem mapping them I mean gson will do it for me but i dont know if there are any more that I would need etc.
but most importantly my app only needs the low standard url pictures all the other information is useless for me.
Ofcourse, I know one way to do it which is to convert the whole thing into a string and parse the whole string through multiple times looking for key words etc and making images etc. I dont want to do that because its ugly. It works but I want a concise way of doing that at the same time without mapping completely.
Using Gson's JsonParser class, you can parse your JSON into a tree of JsonElements, and then extract just the data that you need.
For example, in order to print out all the low resolution URLs, you could use the following code:
String json = "...";
JsonParser parser = new JsonParser();
JsonObject object = parser.parse(json).getAsJsonObject();
JsonArray data = object.getAsJsonArray("data");
for (JsonElement element : data) {
JsonObject images = element.getAsJsonObject().getAsJsonObject("images");
JsonObject lowResolution = images.getAsJsonObject("low_resolution");
String url = lowResolution.getAsJsonPrimitive("url").getAsString();
System.out.println(url);
}
Using your example JSON, this would print:
https://scontent.cdninstagram.com/t51.2885-15/s320x320/e35/12729405_224148847934280_1450226662_n.jpg?ig_cache_key=MTE5MzA1MjU1NDMxOTg0NDA1Nw%3D%3D.2