Java 结构处理

Java 结构处理:

 

       LinkedHashMap<String, Object> xxx = new LinkedHashMap<>();
        List<String> ma = Arrays.asList("6月", "5月", "4月", "3月", "2月", "1月");
        Iterator<String> it = ma.iterator();
        for (int i = 0; it.hasNext(); i++) {
            String month = it.next();
            ArrayList<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

            for (int j = 0; j < 6; j++) {
                HashMap<String, Object> obj = new HashMap<String, Object>();
                obj.put("id", j);
                obj.put("val", j + 10 + i);
                list.add(obj);
            }
            xxx.put(month, list);
        }

        HashMap<Integer, HashMap<String, Object>> res = new HashMap<>();
        List<String> mArr = xxx.keySet().stream().sorted(Comparator.naturalOrder()).collect(Collectors.toList());
        ArrayList<Object> list = (ArrayList<Object>) xxx.get(mArr.get(0));
        for (int i = 0; i < list.size(); i++) {
            HashMap<String, Object> obj = (HashMap<String, Object>) list.get(i);
            ArrayList<Integer> mv = new ArrayList<>();
            for (int j = 0; j < mArr.size(); j++) {
                HashMap<String, Object> o = ((ArrayList<HashMap<String, Object>>) xxx.get(mArr.get(j))).get(i);
                mv.add((Integer) o.get("val"));
            }
            obj.put("arr", mv);
            System.out.println(obj);
            res.put((Integer) obj.get("id"), obj);
        }

        System.out.println(res);