[JAVA]inputstream을 JSONobject로 변경하는 방법

Since you're already using Google's Json-Simple library, you can parse the json from an InputStream like this:

InputStream inputStream = ... //Read from a file, or a HttpRequest, or whatever.
JSONParser jsonParser = new JSONParser();
JSONObject jsonObject = (JSONObject)jsonParser.parse(
      new InputStreamReader(inputStream, "UTF-8"));

참고사이트

https://stackoverflow.com/questions/22461663/convert-inputstream-to-jsonobject