Json simple Correct recording of an array of objects

Question

JSONObject obj = new JSONObject(); obj.put("name", "name"); obj.put("age", 100); JSONArray list = new JSONArray(); list.add("msg 1"); list.add("msg 2"); list.add("msg 3"); obj.put("messages", list); try { try (FileWriter file = new FileWriter("test.json")) { file.write(obj.toJSONString()); file.flush(); } } catch (IOException e) { e.printStackTrace(); } System.out.print(obj);

I get the string:

  {"name":"name","messages":["msg 1","msg 2","msg 3"],"age":100}

And how can I enter an array of objects? To get a line of the following form:

 [{ "name": "name", "messages": ["msg 1", "msg 2", "msg 3"], "age": 100 }, { "name": "name1", "messages": ["msg 4", "msg 5", "msg 6"], "age": 101 }]

Create JSONArray where to add the set obj, and then add the resulting JSONArray to the new JSONObject and work with it already

Saidolim saidolim 7,918 3 gold marks 19 silver marks 39 bronze marks · Accepted Answer · 2016-11-23T14:36:12

I think before the first object you need to create an array

 JSONArray listMain = new JSONArray(); JSONObject obj1 = new JSONObject(); obj.put("name", "name"); obj.put("age", 100); JSONArray list1 = new JSONArray(); list.add("msg 1"); list.add("msg 2"); list.add("msg 3"); obj1.put("messages", list1); listMain.add(obj1); JSONObject obj2 = new JSONObject(); obj.put("name", "name 2"); obj.put("age", 101); JSONArray list2 = new JSONArray(); list2.add("msg 4"); list2.add("msg 5"); list2.add("msg 6"); obj2.put("messages", list2); listMain.add(obj2); System.out.print(listMain);

But what if you need to add an unknown number of objects to the array?
Well, generate your objects in a cycle, not linearly, and add to the list in the same place.

Json simple Correct recording of an array of objects

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