[英]Group a list of json object by property inside the common Array in Java
我想问是否可以将 object 与另一个 object 组合在其公共阵列中。
这是 JSON 响应,我需要按程序 id对项目列表进行分组。 我正在尝试将其放在 HashMap 上,但效果不佳。
{
"id": "",
"ordered_by": 64,
"order_details": [
{
"resource": "Product",
"required_prescription": false,
"item": {
"id": 6,
"name": "Synergistic Copper Gloves",
"code": "51537661-C",
"enabled": true,
"generic_name": "Mediocre Steel Wallet",
"price_cents": 200000
},
"program": {
"id": 12,
"name": "Synergistic Wooden Shoes",
"provider": "Synergistic Rubber Coat",
"discount_type": "fixed"
}
},
{
"resource": "Product",
"required_prescription": true,
"item": {
"id": 7,
"name": "Rustic Leather Table",
"code": "74283131-P",
"enabled": true,
"generic_name": "Incredible Bronze Clock",
"price_cents": 8994
},
"program": {
"id": 12,
"name": "Synergistic Wooden Shoes",
"provider": "Synergistic Rubber Coat",
"discount_type": "fixed"
}
},
{
"resource": "Product",
"required_prescription": false,
"item": {
"id": 116,
"name": "Ergonomic Marble Hat",
"code": "98845056-A",
"enabled": true,
"generic_name": "Incredible Granite Lamp",
"price_cents": 8267
},
"program": {
"id": 10,
"name": "Durable Rubber Bag",
"provider": "Aerodynamic Steel Chair",
"discount_type": "fixed"
}
}
]}
这应该是分组后预期的 object。 该项目按程序 ID 12 和 10 分组。
[
{
"id": 12,
"name": "Synergistic Wooden Shoes",
"provider": "Synergistic Rubber Coat",
"discount_type": "fixed",
"item": [
{
"id": 6,
"name": "Synergistic Copper Gloves",
"code": "51537661-C",
"enabled": true,
"generic_name": "Mediocre Steel Wallet",
"price_cents": 200000
},
{
"id": 7,
"name": "Rustic Leather Table",
"code": "74283131-P",
"enabled": true,
"generic_name": "Incredible Bronze Clock",
"price_cents": 8994
}
]
},
{
"id": 10,
"name": "Durable Rubber Bag",
"provider": "Aerodynamic Steel Chair",
"discount_type": "fixed",
"item": [
{
"id": 116,
"name": "Ergonomic Marble Hat",
"code": "98845056-A",
"enabled": true,
"generic_name": "Incredible Granite Lamp",
"price_cents": 8267
}
]
}
]
所有评论将不胜感激。 提前致谢!
我已获取您的源 json 并尝试根据您的规范对其进行转换,这是有效的解决方案,将您的源 JSON 作为字符串传递,您将获得所需的 Z78E6221F6393D1356681DB398F14CE6D
private String parseJson(String source) {
JSONArray result = new JSONArray();
List<Integer> ids = new ArrayList<>();
HashMap<Integer,JSONObject> programs = new HashMap<>();
try {
JSONObject jSource = new JSONObject(source);
JSONArray orderDetails = jSource.getJSONArray("order_details");
if (orderDetails.length() > 0) {
for (int i = 0; i < orderDetails.length(); i++) {
JSONObject jsonObject = orderDetails.getJSONObject(i);
JSONObject item = jsonObject.getJSONObject("item");
JSONObject program = jsonObject.getJSONObject("program");
int programId = jsonObject.getJSONObject("program").getInt("id");
if (!ids.contains(programId)) {
ids.add(programId);
program.put("item",new JSONArray().put(item));
programs.put(programId,program);
}else{
program.put("item",programs.get(programId).getJSONArray("item").put(item));
}
}
for(int k :programs.keySet()){
result.put(programs.get(k));
}
}
} catch (Exception e) {
e.printStackTrace();
}
return result.toString();
}
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