how to parse the json response which starts with an array

how to parse the json response which starts with an array - java

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();
}

Related

elasticsearch how to group by repetitive items in array without distinct

I'm trying to get the counts group by the repetitive items in array without distinct, use aggs terms but not work
GET /my_index/_search
{
"size": 0,
"aggs": {
"keywords": {
"terms": {
"field": "keywords"
}
}
}
}
documents like:
"keywords": [
"value1",
"value1",
"value2"
],
but the result is:
"buckets": [
{
"key": "value1",
"doc_count": 1
},
{
"key": "value2",
"doc_count": 1
}
]
how can i get the result like:
"buckets": [
{
"key": "value1",
"doc_count": 2
},
{
"key": "value2",
"doc_count": 1
}
]

finally I modify the mapping use nested:
"keywords": {
"type": "nested",
"properties": {
"count": {
"type": "integer"
},
"keyword": {
"type": "keyword"
}
}
},
and query:
GET /my_index/_search
{
"size": 0,
"aggs": {
"keywords": {
"nested": {
"path": "keywords"
},
"aggs": {
"keyword_name": {
"terms": {
"field": "keywords.keyword"
},
"aggs": {
"sums": {
"sum": {
"field": "keywords.count"
}
}
}
}
}
}
}
}
result:
"buckets": [{
"key": "value1",
"doc_count": 495,
"sums": {
"value": 609
}
},
{
"key": "value2",
"doc_count": 440,
"sums": {
"value": 615
}
},
{
"key": "value3",
"doc_count": 319,
"sums": {
"value": 421
}
},
...]

Validating json payload against swagger file - json-schema-validator

I am trying to validate a json payload against a swagger file that contains the service agreement. I am using the json-schema-validator(2.1.7) library to achieve this, but at the moment it's not validating against the specified patterns or min/max length.
Java Code:
public void validateJsonData(final String jsonData) throws IOException, ProcessingException {
ClassLoader classLoader = getClass().getClassLoader();
File jsonSchemaFile = new File (classLoader.getResource("coachingStatusUpdate.json").getFile());
String jsonSchema = new String(Files.readAllBytes(jsonSchemaFile.toPath()));
final JsonNode dataNode = JsonLoader.fromString(jsonData);
final JsonNode schemaNode = JsonLoader.fromString(jsonSchema);
final JsonSchemaFactory factory = JsonSchemaFactory.byDefault();
JsonValidator jsonValidator = factory.getValidator();
ProcessingReport report = jsonValidator.validate(schemaNode, dataNode);
System.out.println(report);
if (!report.toString().contains("success")) {
throw new ProcessingException (
report.toString());
}
}
Message I am sending through
{
"a": "b",
"c": "d",
"e": -1,
"f": "2018-10-30",
"g": "string" }
The swagger definition:
{
"swagger": "2.0",
"info": {
"version": "1.0.0",
"title": "Test",
"termsOfService": "http://www.test.co.za",
"license": {
"name": "Test"
}
},
"host": "localhost:9001",
"basePath": "/test/",
"tags": [
{
"name": "controller",
"description": "Submission"
}
],
"paths": {
"/a": {
"put": {
"tags": [
"controller"
],
"summary": "a",
"operationId": "aPUT",
"consumes": [
"application/json;charset=UTF-8"
],
"produces": [
"application/json;charset=UTF-8"
],
"parameters": [
{
"in": "body",
"name": "aRequest",
"description": "aRequest",
"required": true,
"schema": {
"$ref": "#/definitions/aRequest"
}
}
],
"responses": {
"200": {
"description": "Received",
"schema": {
"$ref": "#/definitions/a"
}
},
"400": {
"description": "Bad Request"
},
"401": {
"description": "Unauthorized"
},
"408": {
"description": "Request Timeout"
},
"500": {
"description": "Generic Error"
},
"502": {
"description": "Bad Gateway"
},
"503": {
"description": "Service Unavailable"
}
}
}
}
},
"definitions": {
"aRequest": {
"type": "object",
"required": [
"a",
"b",
"c",
"d"
],
"properties": {
"a": {
"type": "string",
"description": "Status",
"enum": [
"a",
"b",
"c",
"d",
"e",
"f",
"g",
"h"
]
},
"aReason": {
"type": "string",
"description": "Reason",
"enum": [
"a",
"b",
"c",
"d",
"e",
"f",
"g",
"h",
"i",
"j",
"k",
"l",
"m",
"n"
]
},
"correlationID": {
"type": "integer",
"format": "int32",
"description": "",
"minimum": 1,
"maximum": 9999999
},
"effectiveDate": {
"type": "string",
"format": "date",
"description": ""
},
"f": {
"type": "string",
"description": "",
"minLength": 1,
"maxLength": 100
}
}
},
"ResponseEntity": {
"type": "object",
"properties": {
"body": {
"type": "object"
},
"statusCode": {
"type": "string",
"enum": [
"100",
"101",
"102",
"103",
"200",
"201",
"202",
"203",
"204",
"205",
"206",
"207",
"208",
"226",
"300",
"301",
"302",
"303",
"304",
"305",
"307",
"308",
"400",
"401",
"402",
"403",
"404",
"405",
"406",
"407",
"408",
"409",
"410",
"411",
"412",
"413",
"414",
"415",
"416",
"417",
"418",
"419",
"420",
"421",
"422",
"423",
"424",
"426",
"428",
"429",
"431",
"451",
"500",
"501",
"502",
"503",
"504",
"505",
"506",
"507",
"508",
"509",
"510",
"511"
]
},
"statusCodeValue": {
"type": "integer",
"format": "int32"
}
}
}
}
}
As you can see I am sending through a correlationID of -1, which should fail validation, but at the moment is's returning as successful:
com.github.fge.jsonschema.report.ListProcessingReport: success

I suggest using this library, which worked for me:
https://github.com/bjansen/swagger-schema-validator
Example:
invalid-pet.json
{
"id": 0,
"category": {
"id": 0,
"name": "string"
},
"named": "doggie",
"photoUrls": [
"string"
],
"tags": [
{
"id": 0,
"name": "string"
}
],
"status": "available"
}
My SchemaParser:
#Component
public class SchemaParser {
private Logger logger = LoggerFactory.getLogger(getClass());
public boolean isValid(String message, Resource schemaLocation) {
try (InputStream inputStream = schemaLocation.getInputStream()) {
SwaggerValidator validator = SwaggerValidator.forJsonSchema(new InputStreamReader(inputStream));
ProcessingReport report = validator.validate(message, "/definitions/Pet");
return report.isSuccess();
} catch (IOException e) {
logger.error("IOException", e);
return false;
} catch (ProcessingException e) {
e.printStackTrace();
return false;
}
}
}
A test:
#Test
void shouldFailValidateWithPetstoreSchema() throws IOException {
final Resource validPetJson = drl.getResource("http://petstore.swagger.io/v2/swagger.json");
try (Reader reader = new InputStreamReader(validPetJson.getInputStream(), UTF_8)) {
final String petJson = FileCopyUtils.copyToString(reader);
final boolean valid = schemaParser.isValid(petJson, petstoreSchemaResource);
assertFalse(valid);
}
}

json-schema-validator seems to work with pure JSON Schema only. OpenAPI Specification uses an extended subset of JSON Schema, so the schema format is different. You need a library that can validate specifically against OpenAPI/Swagger definitions, such as Atlassian's swagger-request-validator.

How to Make POJO class when response have mix data. some key contain Object and some have array type data

I am using retrofit2 to Make network request,I have searched over here but my bad luck i couldn't find any working solution. that's why i am putting my question here.
my JSON response is given below.
The problem is sometimes the REST API returns an Array of hour , but sometimes it is just a Object. How does one handle such a situation?
Is there an elegant way to handle a mixed array like this in Retrofit/Gson? I'm not responsible for the data coming from the API, so I don't think changing that will be an option.Any help would be appreciated.
{
"status": "success",
"data": [
{
"id": 30,
"name": "Rh.poutiqe",
"global_delay": "0",
"approved": true,
"min_order": "0.000",
"has_pickup": 0,
"address": {
"id": "35",
"name": "Store Address",
"type": "house",
"block_number": "8",
"street": "85",
"avenue": "0",
"building": "2",
"floor": "",
"apartment": "",
"directions": "",
"lat": null,
"lng": null,
"city": {
"id": "79",
"name": "Bayan",
"zone": "3",
"governate": "Hawally"
}
},
"status": "Available",
"owner": {
"id": "32",
"username": "+96550199900",
"creation_date": "2017-08-07 09:46:49",
"info": {
"name": "Asmaa alkandri",
"email": "Asooma_q8#hotmail.com",
"mobile": "50199900",
"store_id": "30",
"device_token": "e01efb2f03cd43509242c7b38ca890471db2e5b056f50b7a3661c34ab45b0b6e"
},
"addresses": [
{
"id": "35",
"name": "Store Address",
"type": "house",
"block_number": "8",
"street": "85",
"avenue": "0",
"building": "2",
"floor": "",
"apartment": "",
"directions": "",
"lat": null,
"lng": null,
"city": {
"id": "79",
"name": "Bayan",
"zone": "3",
"governate": "Hawally"
}
}
]
},
"open": false,
"image": {
"src": "https://api.bits.com.kw/assets/stores/30/y1nzl.jpg"
},
"hours": {
"2": [
{
"id": "117",
"day_id": "2",
"day_of_week": "Tuesday",
"start_hour": "1400",
"end_hour": "2300"
}
],
"3": [
{
"id": "118",
"day_id": "3",
"day_of_week": "Wednesday",
"start_hour": "1400",
"end_hour": "2300"
}
]
},
"next_available": {
"day_of_week": "Tuesday",
"start_hour": "1400",
"end_hour": "2300",
"day_id": "2",
"date": "2017-09-19"
}
},
{
"id": 57,
"name": "RH Kitchen",
"global_delay": "0",
"approved": true,
"min_order": "0.000",
"has_pickup": 0,
"address": {
"id": "63",
"name": "Store Address",
"type": "house",
"block_number": "5",
"street": "2",
"avenue": "",
"building": "97",
"floor": "",
"apartment": "",
"directions": "",
"lat": null,
"lng": null,
"city": {
"id": "79",
"name": "Bayan",
"zone": "3",
"governate": "Hawally"
}
},
"status": "Not Receiving Orders",
"owner": {
"id": "57",
"username": "+96566659454",
"creation_date": "2017-09-09 11:32:19",
"info": {
"name": "RH Kitchen",
"email": "taiba.aldarmi#gmail.com",
"mobile": "66659454",
"store_id": "57",
"device_token": "f6fffd3a393e9aea53863cffbb55b51a3afd2475e952091ea362a85fc930ec9a"
},
"addresses": [
{
"id": "63",
"name": "Store Address",
"type": "house",
"block_number": "5",
"street": "2",
"avenue": "",
"building": "97",
"floor": "",
"apartment": "",
"directions": "",
"lat": null,
"lng": null,
"city": {
"id": "79",
"name": "Bayan",
"zone": "3",
"governate": "Hawally"
}
}
]
},
"open": false,
"image": {
"src": "https://api.bits.com.kw/placeholder.jpg"
},
"hours": [],
"next_available": false
},
{
"id": 64,
"name": "Lets__shop",
"global_delay": "1440",
"approved": true,
"min_order": "5.000",
"has_pickup": 0,
"address": {
"id": "64",
"name": "Store Address",
"type": "house",
"block_number": "3",
"street": "312",
"avenue": "",
"building": "56",
"floor": "",
"apartment": "",
"directions": "",
"lat": "0.000000000000000000",
"lng": "0.000000000000000000",
"city": {
"id": "126",
"name": "Saad Al Abdullah",
"zone": "9",
"governate": "Jahra"
}
},
"status": "Available",
"owner": {
"id": "58",
"username": "+96555899184",
"creation_date": "2017-09-09 18:33:12",
"info": {
"name": "Moneera ibrahim",
"email": "Moneeera96#gmail.com",
"mobile": "55899184",
"store_id": "64",
"device_token": null
},
"addresses": [
{
"id": "64",
"name": "Store Address",
"type": "house",
"block_number": "3",
"street": "312",
"avenue": "",
"building": "56",
"floor": "",
"apartment": "",
"directions": "",
"lat": "0.000000000000000000",
"lng": "0.000000000000000000",
"city": {
"id": "126",
"name": "Saad Al Abdullah",
"zone": "9",
"governate": "Jahra"
}
}
]
},
"open": true,
"next_available": {
"day_of_week": "Today",
"start_hour": "1646",
"end_hour": "2230",
"day_id": "0",
"date": "2017-09-17 1646"
},
"image": {
"src": "https://api.bits.com.kw/assets/stores/64/0xqh4.jpg"
},
"hours": [
[
{
"id": "161",
"day_id": "0",
"day_of_week": "Sunday",
"start_hour": "730",
"end_hour": "2230"
}
],
[
{
"id": "162",
"day_id": "1",
"day_of_week": "Monday",
"start_hour": "730",
"end_hour": "2230"
}
],
[
{
"id": "163",
"day_id": "2",
"day_of_week": "Tuesday",
"start_hour": "730",
"end_hour": "2230"
}
],
[
{
"id": "164",
"day_id": "3",
"day_of_week": "Wednesday",
"start_hour": "730",
"end_hour": "2230"
}
],
[
{
"id": "165",
"day_id": "4",
"day_of_week": "Thursday",
"start_hour": "730",
"end_hour": "2230"
}
],
[
{
"id": "166",
"day_id": "5",
"day_of_week": "Friday",
"start_hour": "730",
"end_hour": "2230"
}
],
[
{
"id": "167",
"day_id": "6",
"day_of_week": "Saturday",
"start_hour": "730",
"end_hour": "2230"
}
]
]
}
]
}
I have Make POJO class like:
public class StoreModel implements Parcelable{
#SerializedName("id")
public int id;
#SerializedName("name")
public String name;
#SerializedName("global_delay")
public String global_delay;
#SerializedName("approved")
public boolean approved;
#SerializedName("min_order")
public String min_order;
#SerializedName("has_pickup")
public int has_pickup;
#SerializedName("address")
public AddressModel address;
#SerializedName("status")
public String status;
#SerializedName("owner")
public OwnerModel owner;
#SerializedName("open")
public boolean open;
#SerializedName("next_available")
public Object next_available;
#SerializedName("image")
public ImageModel image;
protected StoreModel(Parcel in) {
id = in.readInt();
name = in.readString();
global_delay = in.readString();
approved = in.readByte() != 0;
min_order = in.readString();
has_pickup = in.readInt();
address = in.readParcelable(AddressModel.class.getClassLoader());
status = in.readString();
owner = in.readParcelable(OwnerModel.class.getClassLoader());
open = in.readByte() != 0;
image = in.readParcelable(ImageModel.class.getClassLoader());
//next_available = in.readParcelable(NextAvailableModel.class.getClassLoader());
}
public static final Creator<StoreModel> CREATOR = new Creator<StoreModel>() {
#Override
public StoreModel createFromParcel(Parcel in) {
return new StoreModel(in);
}
#Override
public StoreModel[] newArray(int size) {
return new StoreModel[size];
}
};
#Override
public int describeContents() {
return 0;
}
#Override
public void writeToParcel(Parcel parcel, int i) {
parcel.writeInt(id);
parcel.writeString(name);
parcel.writeString(global_delay);
parcel.writeByte((byte) (approved ? 1 : 0));
parcel.writeString(min_order);
parcel.writeInt(has_pickup);
parcel.writeParcelable(address, i);
parcel.writeString(status);
parcel.writeParcelable(owner, i);
parcel.writeByte((byte) (open ? 1 : 0));
parcel.writeParcelable(image, i);
/*if(next_available instanceof NextAvailableModel)
parcel.writeParcelable((NextAvailableModel)next_available, i);
else if(next_available instanceof Boolean)
parcel.writeByte((byte) ((Boolean)next_available ? 1 : 0));*/
}
#SerializedName("hours")
#Expose
public List<List<HoursModel>> hours;
}
**And HoursModel Java Class**
public class HoursModel implements Parcelable{
#SerializedName("id")
public String id;
#SerializedName("day_id")
public String day_id;
#SerializedName("day_of_week")
public String day_of_week;
#SerializedName("start_hour")
public String start_hour;
#SerializedName("end_hour")
public String end_hour;
protected HoursModel(Parcel in) {
id = in.readString();
day_id = in.readString();
day_of_week = in.readString();
start_hour = in.readString();
end_hour = in.readString();
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(id);
dest.writeString(day_id);
dest.writeString(day_of_week);
dest.writeString(start_hour);
dest.writeString(end_hour);
}
#Override
public int describeContents() {
return 0;
}
public static final Creator<HoursModel> CREATOR = new Creator<HoursModel>() {
#Override
public HoursModel createFromParcel(Parcel in) {
return new HoursModel(in);
}
#Override
public HoursModel[] newArray(int size) {
return new HoursModel[size];
}
};
}

First, if possible, verify if you can fix this braindead API. :)
First of all, notice that the API returns 2 very different types of data:
list of hours (no keys)
map of hours (each element has a key!)
You'll need to represent this structure in your POJO somehow. Maybe a list of key-hour pairs, like List<Pair<String, Hour>, with nullable key? Your call.
Second, you need to create a custom TypeAdapter that can deserialize a list and/or map into a Java object.
Once you have a type adapter, you can either attach it to a field using #JsonAdapter annotation, or register custom type in Gson builder.
https://google.github.io/gson/apidocs/com/google/gson/annotations/JsonAdapter.html
http://www.javacreed.com/gson-typeadapter-example/

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");

Develop Reference

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

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