Convert JsonObject to String

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you can use

JsonObject.getString("msg");

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There is an inbuilt method to convert a JSONObject to a String. Why don't you use that:

JSONObject json = new JSONObject();


json.toString();

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I think you need this :

Suppose you have Sample JSON like this :

{"ParamOne":"InnerParamOne":"InnerParamOneValue","InnerParamTwo":"InnerParamTwoValue","InnerParamThree":"InnerParamThreeValue","InnerParamFour":"InnerParamFourValue","InnerParamFive":"InnerParamFiveValue"}}

Converted to String :

String response = {\"ParamOne\":{\"InnerParamOne\":\"InnerParamOneValue\",\"InnerParamTwo\":\"InnerParamTwoValue\",\"InnerParamThree\":\"InnerParamThreeValue\",\"InnerParamFour\":\"InnerParamFourValue\",\"InnerParamFive\":\"InnerParamFiveValue\"}} ;

Just replace " by \"

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Add a double quotes outside the brackets and replace double quotes inside the {} with \"

So: "{\"data\":{..... }"

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     This should get all the values from the above JsonObject
System.out.println(jsonObj.get("msg"));
System.out.println(jsonObj.get("code"));


JsonObject obj= jsonObj.get("data").getAsJsonObject().get("map").getAsJsonObject();
System.out.println(obj.get("allowNestedValues"));
System.out.println(obj.get("create"));
System.out.println(obj.get("title"));
System.out.println(obj.get("transitions"));

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JSONObject metadata = (JSONObject) data.get("map"); //for example
String jsonString = metadata.**toJSONString()**;

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 var data= {"data": {"map":{"allowNestedValues": true,"create": "2012-12-11 15:16:13","title": "test201212110004","transitions": []}},"msg": "success","code": "0"}

o/p:

Object {data: Object, msg: "success", code: "0"}

Use JSON.stringify to convert entire data into string like below

var stringData = JSON.stringify(data);

o/p:

"{"data":{"map":{"allowNestedValues":true,"create":"2012-12-11 15:16:13","title":"test201212110004","transitions":[]}},"msg":"success","code":"0"}"

Use JSON.parse to convert entire string object into JSON Object like below

var orgdata = JSON.parse(stringData);

o/p:

Object {data: Object, msg: "success", code: "0"}

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You can use reliable library GSON

private static final Type DATA_TYPE_JSON =
new TypeToken<JSONObject>() {}.getType();
JSONObject orderJSON = new JSONObject();
orderJSON.put("noOfLayers", "2");
orderJSON.put("baseMaterial", "mat");
System.out.println("JSON == "+orderJSON.toString());
String dataAsJson = new Gson().toJson(orderJSON, DATA_TYPE_JSON);
System.out.println("Value of dataAsJson == "+dataAsJson.toString());
String data = new Gson().toJson(dataAsJson);
System.out.println("Value of jsonString == "+data.toString());

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You can use:

JSONObject jsonObject = new JSONObject();
jsonObject.toString();

And if you want to get a specific value, you can use:

jsonObject.getString("msg");

or Integer value

jsonObject.getInt("codeNum");

For long Integers

jsonObject.getLong("longNum");

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You can try Gson convertor, to get the exact conversion like json.stringify

val jsonString:String = jsonObject.toString()
val gson:Gson = GsonBuilder().setPrettyPrinting().create()
val json:JsonElement = gson.fromJson(jsonString,JsonElement.class)
val jsonInString:String= gson.toJson(json)
println(jsonInString)

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JsonObject seems to be JSON-P API. If this is true, I would use JsonWritter to write JsonValue into StringWriter:

    JsonObjectBuilder pokemonBuilder = Json.createObjectBuilder();
pokemonBuilder.add("name", "Pikachu");
pokemonBuilder.add("type", "electric");
pokemonBuilder.add("cp", 827);
pokemonBuilder.add("evolve", true);
JsonObject pokemon = pokemonBuilder.build();
StringWriter sw = new StringWriter(128);
try (JsonWriter jw = Json.createWriter(sw)) {
jw.write(pokemon);
}
String pokemonStr = sw.toString();

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just use ObjectMapper

ObjectMapper objectMapper = new ObjectMapper();
objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS,false);
//here more config opts...
Car car = new Car("yellow", "renault");
objectMapper.writeValue(new File("target/car.json"), car);
String carAsString = objectMapper.writeValueAsString(car);

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Use This :

JSONObject json = new JSONObject();
JSONObject.valueToString(json.toString());

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JSONObject data = (JSONObject) data.get("map");
//for example
String jsonString = data.toJSONString();

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Example of Model

public class Person {
private String name;
private String age;
// setter and getter
// toString method
}

Example of Service method

public String getPerson() {
JSONObject returnObj = new JSONObject();
Person person = new Person();
person.setAge("24");
person.setName("Fazal");
returnObj.put("age", person.getAge());
returnObj.put("name", person.getName());
return returnObj.toString();
}

Json in java dependency needed

<!-- https://mvnrepository.com/artifact/org.json/json -->
<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>{New_Version}</version>
</dependency>

You will get this type of JSON result