I want to create a JSON Object using String.
Example :
JSON {"test1":"value1","test2":{"id":0,"name":"testName"}}
In order to create the above JSON I am using this.
String message;
JSONObject json = new JSONObject();
json.put("test1", "value1");
JSONObject jsonObj = new JSONObject();
jsonObj.put("id", 0);
jsonObj.put("name", "testName");
json.put("test2", jsonObj);
message = json.toString();
System.out.println(message);
I want to know how can I create a JSON which has JSON Array in it.
Below is the sample JSON.
{
"name": "student",
"stu": {
"id": 0,
"batch": "batch@"
},
"course": [
{
"information": "test",
"id": "3",
"name": "course1"
}
],
"studentAddress": [
{
"additionalinfo": "test info",
"Address": [
{
"H.No": "1243",
"Name": "Temp Address",
"locality": "Temp locality",
"id":33
},
{
"H.No": "1243",
"Name": "Temp Address",
"locality": "Temp locality",
"id":33
},
{
"H.No": "1243",
"Name": "Temp Address",
"locality": "Temp locality",
"id":36
}
],
"verified": true,
}
]
}
Thanks.
5 Answers
JSONArray may be what you want.
String message;
JSONObject json = new JSONObject();
json.put("name", "student");
JSONArray array = new JSONArray();
JSONObject item = new JSONObject();
item.put("information", "test");
item.put("id", 3);
item.put("name", "course1");
array.put(item);
json.put("course", array);
message = json.toString();
// message
// {"course":[{"id":3,"information":"test","name":"course1"}],"name":"student"}
In contrast to what the accepted answer proposes, the documentation says that for JSONArray() you must use put(value) no add(value).
(Android API 19-27. Kotlin 1.2.50)
If you use the gson.JsonObject you can have something like that:
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
String jsonString = "{'test1':'value1','test2':{'id':0,'name':'testName'}}"
JsonObject jsonObject = (JsonObject) jsonParser.parse(jsonString)
Underscore-java can create json from an object.
String message = U.objectBuilder()
.add("course", U.arrayBuilder()
.add(U.objectBuilder()
.add("id", 3)
.add("information", "test")
.add("name", "course1")
))
.add("name", "student")
.toJson();
System.out.println(message);
// {
// "course": [
// {
// "id": 3,
// "information": "test",
// "name": "course1"
// }
// ],
// "name": "student"
// }
String jsonString = "{'element1':'value1','element2':{'id':0,'name':'testName'}}";
JsonObject jsonObject = (JsonObject) JsonParser.parseString(jsonString);
