java 合并两个map

    public static Map mapMerge(List<Map> list) {
        Map<Object, List> map = new HashMap<>();
        for (Map m : list) {
            Iterator<Object> it = m.keySet().iterator();
            while (it.hasNext()) {
                Object key = it.next();
                if (!map.containsKey(key)) {
                    List newList = new ArrayList<>();
                    newList.add(m.get(key));
                    map.put(key, newList);
                } else {
                    map.get(key).add(m.get(key));
                }
            }
        }
        return map;
    }