如何创建不带键的JSONObject？

Question

我正在尝试将我的JSONObject设置为以下格式。我对如何拥有Yellow Room和Blue Room感到困惑，但是他们没有钥匙？

[ { "room": "Yellow Room", "Bookings": [
    { "customer": "John", "age": "21" },
    { "customer": "Bob", "age": "33" }
    ] },
  { "room": "Blue Room", "Bookings": [
    { "customer": "Mike", "age": "56" },
    { "customer": "Billy", "age": "37" }
    ] }
]

这不是我的实际代码，我使用循环来执行此操作，但是我想首先了解一下。

JSONObject rooms = new JSONObject();
rooms.put("name", "Yellow room");
JSONObject bookings = new JSONObject();
JSONObject booking = new JSONObject();
booking.put("customer", "John");
booking.put("age", "21");
bookings.put("bookings", booking);
booking.put("customer", "Bob");
booking.put("age", "33");
bookings.put("bookings", booking);
// Now I am lost, What do I do?

rooms = new JSONObject();
rooms.put("name", "Blue room");
bookings = new JSONObject();
booking = new JSONObject();
booking.put("customer", "Mike");
booking.put("age", "56");
bookings.put("bookings", booking);
booking.put("customer", "Billy");
booking.put("age", "37");
bookings.put("bookings", booking);
// Now I am lost, What do I do?

Answer 1

首先，您需要创建房间列表，预订列表以及预订地图和房间地图。然后，您可以将预订添加到bookingsList，将bookingsList添加到房间，最后您可以将该房间添加到roomsList。请参考以下代码，

Map<String, Object> room = new HashMap<>(); //put room details to this
Map<String, Object> booking = new HashMap<>(); //put booking details to this
List<Map<String, Object>> list = new ArrayList<>(); //put rooms to this
List<Map<String, Object>> bookingList = new ArrayList<>(); //put bookings to this

booking.put("customer", "John"); //creating booking 1
booking.put("age", "21");
bookingList.add(booking); //adding booking bookingList

booking.put("customer", "Bob"); //creating booking 2
booking.put("age", "33");
bookingList.add(booking); //adding booking to bookingList

room.put("name", "Yellow room"); //adding name to room list
room.put("bookings", bookingList); //adding bookings to room list
list.add(room);


booking.put("customer", "Mike");
booking.put("age", "56");
bookingList.add(booking);

booking.put("customer", "Billy");
booking.put("age", "37");
bookingList.add(booking);

room.put("name", "Blue room"); //adding second name to room list
room.put("bookings", bookingList); //adding second bookings to room list
list.add(room); 

System.out.println(list);

输出

[{name=Blue room, bookings=[{age=37, customer=Billy}, {age=37, customer=Billy}, {age=37, customer=Billy}, {age=37, customer=Billy}]}, {name=Blue room, bookings=[{age=37, customer=Billy}, {age=37, customer=Billy}, {age=37, customer=Billy}, {age=37, customer=Billy}]}]

使用JsonObject

JSONObject rooms = new JSONObject();
JSONObject booking = new JSONObject();
JSONArray list = new JSONArray();
JSONArray bookingList = new JSONArray();

booking.put("customer", "John"); //creating booking 1
booking.put("age", "21");
bookingList.put(booking); //adding booking bookingList

booking.put("customer", "Bob"); //creating booking 2
booking.put("age", "33");
bookingList.put(booking); //adding booking to bookingList

rooms.put("name", "Yellow room"); //adding name to room list
rooms.put("bookings", bookingList); //adding bookings to room list
list.put(rooms);


booking.put("customer", "Mike");
booking.put("age", "56");
bookingList.put(booking);

booking.put("customer", "Billy");
booking.put("age", "37");
bookingList.put(booking);

rooms.put("name", "Blue room"); //adding second name to room list
rooms.put("bookings", bookingList); //adding second bookings to room list
list.put(rooms); 

System.out.println(list);

输出

[{"name":"Blue room","bookings":[{"age":"37","customer":"Billy"},{"age":"37","customer":"Billy"},{"age":"37","customer":"Billy"},{"age":"37","customer":"Billy"}]},{"name":"Blue room","bookings":[{"age":"37","customer":"Billy"},{"age":"37","customer":"Billy"},{"age":"37","customer":"Billy"},{"age":"37","customer":"Billy"}]}]

Answer 2

您可以使用下面的链接创建JSON对象数组，  https://docs.oracle.com/javame/8.0/api/json/api/com/oracle/json/JsonArray.html

您可以在下面找到屏幕截图，