I have an empty json file in my java project with only json object bracket:- that is
a.json
{}
i want to read from it and after adding a key value write back to it, that is:-
{"a":"a"}
Is there any Json Library i can use to do so.
I don't wanna use simple FileReaders and FileWriters in java to read and write.
There are several libraries for this task.
One could be Jettison https://mvnrepository.com/artifact/org.codehaus.jettison/jettison
Path filePath = <your-file-path>;
String json = new String(Files.readAllBytes(filePath));
JSONObject jsonObject = new JSONObject(json);
jsonObject.put("a", "a");
Files.write(filePath, jsonObject.toString().getBytes());