I have json serialized arraylist in java which i want to insert into another json object, how can i do this without having double quotes on my json string?
JSONSerializer serializer = new JSONSerializer();
String serializedList = serializer.serialize(myArrayList);
I want serializedList nested into my json object:
myJsonOutput = Json.createObjectBuilder()
.add("key1", "val1")
.add("key2", "val2")
.add("myArray", serializedList)
.build();
If i do it like this my serializedList will be inserted as a whole string?
Related
I have a REST response, which contains text and JSON value. I need to get uniqueId from JSON value, what will be the best way?
My JSON is very big, but looks like this:
paymentResponse = Published your custom Transaction json to topic env_txn_endtoend_01 Final json: {"txnId":null, "envelope":{"uniqueId":234234_2344432_23442","rootID":"34534554534" etc...}}
How can I get this uniqueId value = 234234_2344432_23442?
There are many libraries to help with Json Serialization and Deserialization. Jackson Object Mapper is one of the most popular ones.
The code would be something like this. To begin with you would need Java Pojo which represents your json Object e.g. let's consider this example from this tutorial, where you can create a Car Java Object from a Car json string.
ObjectMapper objectMapper = new ObjectMapper();
String json = "{ \"color\" : \"Black\", \"type\" : \"BMW\" }";
Car car = objectMapper.readValue(json, Car.class); // you should have a Car Class(Pojo) with color, and type attributes
Final json: {"txnId":null,
"envelope":{"uniqueId":234234_2344432_23442","rootID":"34534554534"
etc...}}
How can i get this uniqueId value = 234234_2344432_23442
You could do something like this:
import groovy.json.JsonSlurper
...
String jsonString = '{"txnId":null, "envelope":{"uniqueId":"234234_2344432_23442","rootID":"34534554534"}}'
def slurper = new JsonSlurper()
def json = slurper.parseText(jsonString)
def envelope = json.envelope
String rootId = envelope.rootID
assert rootId == '34534554534'
String uniqueId = envelope.uniqueId
assert uniqueId == '234234_2344432_23442'
Is there a way to convert the whole JSON path data to a string in Java?
I am working on APIs and their responses are in JSON format. It is easy to understand the JSON structure through Postman/WireShark but I am trying to run an API request through Java, grab the response, convert the raw response to JSON, convert JSON response to a string format and print it. The method '.getString()' is to access a particular element and not the whole data. The method '.toString()' does not work on JSON data either.
JsonPath json = (ConvertRawFiles.rawtoJSON(response));
String id = json.get("id");
log.info("The id is " + id);
JsonPath json = (ConvertRawFiles.rawtoJSON(response));
String complete_json_data = ???;
log.info("The complete json data is " + complete_json_data);
The code snippet which is mentioned "???" is what I was trying to achieve.
The methods which can convert a JsonPath object into a String are:
JsonPath json = (ConvertRawFiles.rawtoJSON(response));
String complete_json_data = json.prettify();
and
JsonPath json = (ConvertRawFiles.rawtoJSON(response));
String complete_json_data = json.prettyPrint();
var obj = { "field1":"foo", "age":55, "city":"Honolulu"};
var myJSON = JSON.stringify(obj);
Are there any libraries to convert JSON in String/jackson/org.JSON.JSONOBJECT/etc... to a JSON schema?
So far, the only generator I found covert Java classes to JSON schemas. I'm about to write my own converted, but it'd be nice if I didn't have to re-invent the wheel.
looks like there isn't. I had to write my own generator.
Yes there is: https://github.com/java-json-tools/json-schema-validator. It ingests Jacson's JsonNode containing the schema definition and can validate JSON data against that schema.
You can use GSON library.
Convert Java object to JSON:
Gson gson = new Gson();
Staff obj = new Staff();
// 1. Java object to JSON, and save into a file
gson.toJson(obj, new FileWriter("D:\\file.json"));
// 2. Java object to JSON, and assign to a String
String jsonInString = gson.toJson(obj);
Convert JSON to Java object:
Gson gson = new Gson();
// 1. JSON to Java object, read it from a file.
Staff staff = gson.fromJson(new FileReader("D:\\file.json"), Staff.class);
// 2. JSON to Java object, read it from a Json String.
String jsonInString = "{'name' : 'foo'}";
Staff staff = gson.fromJson(jsonInString, Staff.class);
// JSON to JsonElement, convert to String later.
JsonElement json = gson.fromJson(new FileReader("D:\\file.json"), JsonElement.class);
String result = gson.toJson(json);
Here is my json:
{
"timestamp":"04295d4f-2a6f-4a38-a818-52108cbdc358",
"lastFullSyncDate":null,
"ftpInfo":null,
"listingInfo":{
"itemID":"110179365615",
"itemTitle":"test",
"itemPrice":"88.2235294117647",
.......
....
.....
}
}
I have a java class named listingInfo was trying to use gson to convert the string with the key of listingInfo to the class, but i'm getting nulls for all the vars.
Gson gson = new Gson();
gson.fromJson(json, ListingInfo.class);
While trying to convert to the part class which contains the time stamp and etc i dot get the vars but the listingInfo is null inside
Is it possible to get into the nested key and only convert him to the class?
You can do it by parsing whole json tree and then extracting the nested key
String json = ...; //your json string
Gson gson = new Gson();
JsonElement element = new JsonParser().parse(json); //parse to json tree
JsonElement listingElement = element.getAsJsonObject().get("listingInfo"); // extract key
ListingInfo listingInfo = gson.fromJson(listingElement, ListingInfo.class);
I would like to know if it is possible to convert any Java object to JSON object. Currently I have the following code.
JSONArray data = new JSONArray();
for (User user : users) {
JSONArray row = new JSONArray();
row.put(user.getId()).put(user.getUserName()).put(user.isEnabled());
data.put(row);
}
The current issue is different object (e.g. User and Admin) will have different property, thus the above code will work for other object. I am thinking of putting a similar code in my GenericHibernateDAO in order to automatically convert any list into a json list.
You can serialize your java object to json object. There are n number of library is available ex gson, jettyson, flexjson etc.
GSON example -
Gson gson = new Gson();
Collection<Integer> ints = Lists.immutableList(1,2,3,4,5);
(Serialization)
String json = gson.toJson(ints); ==> json is [1,2,3,4,5]
Here i exemplify the way of converting POJO to json using jackson
create your pojo : User user = new User();
you can set or get values to/from user
create ObjectMapper : ObjectMapper mapper = new ObjectMapper();
String json = mapper.writeValueAsString(user);// object to json