如何比较同一JSONObject中的条目

   {"ORDER_1": {"FNAME" : "JOHN","LNAME" : "B","ORDER_ID" : "D123"},
    "ORDER_2": {"FNAME" : "LAURA","LNAME" : "S","ORDER_ID" : "D456"},
    "ORDER_3": {"FNAME" : "JACK","LNAME" : "H","ORDER_ID" : "D123"}}

下面是我动态收集客户信息并将其放入JSONObject散列集中的代码

    Set<JSONObject> customerCollection = new HashSet<JSONObject>();
    Iterator<String> keys = (Iterator<String>) customerOrders.keys();
    while (keys.hasNext()) {
        String key = keys.next();
        JSONObject obj = customerOrders.getJSONObject(key);

        JSONObject result = new JSONObject();
        JSONArray customerList = new JSONArray();

        JSONObject customer = new JSONObject();
        JSONObject customerObj = new JSONObject();

        customer.put("FNAME", obj.optString("FNAME"));
        customer.put("LNAME", obj.optString("LNAME"));
        customerObj.put("customer", customer);
        customerList.add(customerObj);
        result.put("customers", customerList);

        customerCollection.add(result);
    }

[{"customers": [{"name": {"fname": "JOHN","lname": "B"}}]},
 {"customers": [{"name": {"fname": "LAURA","lname": "S"}}]},
 {"customers": [{"name": {"fname": "JACK","lname": "H"}}]}]

现在有一个要求,那就是将共享同一个订单ID的客户分组,而这正是我有点挣扎的地方。如何比较同一个JSONObject的条目,并根据ORDER\u ID键值将它们组合在一起?所以最终的输出应该是这样的(注意到客户JOHN和JACK现在处于相同的JSONArray中,因为他们共享相同的订单ID)

[
    {
     "customers": [{"name": {"fname": "JOHN","lname": "B"}},
                   {"name": {"fname": "JACK","lname": "H"}}
                  ]
    },
    {"customers": [{"name": {"fname": "LAURA","lname": "S"}}
]