ObjectMapper mapper = new ObjectMapper(); String json = mapper.writeValueAsString(object); MyClass obj = mapper.readValue(json, MyClass.class); Gson gson = new Gson(); String json = gson.toJson(object); MyClass obj = gson.fromJson(json, MyClass.class); JSONObject jsonObject = new JSONObject(); String value = (String) jsonObject.get("key"); jsonObject.put("key", "value"); JsonParser parser = Json.createParser(new StringReader(json)); while (parser.hasNext()) { Event event = parser.next(); switch (event) { case KEY_NAME: String key = parser.getString(); break; case VALUE_STRING: String value = parser.getString(); break; } }


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