map的二次分组

private Map<String, Map<Integer, List<AbNormalData>>> groupByAbnormal(List<AbNormalData> values) {
        Map<String, Map<Integer, List<AbNormalData>>> eeMap = new LinkedHashMap<>();
        // 先对用户分组
        Map<String, List<AbNormalData>> eeIpMap = new LinkedHashMap<>();
        values.stream().forEach(i -> {
            List<AbNormalData> onlineRoomVos = eeIpMap.get(i.getDistrictId() + "-" + i.getAddressId());
            if(onlineRoomVos == null){
                onlineRoomVos = new ArrayList<>();
            }
            onlineRoomVos.add(i);
            eeIpMap.put(i.getDistrictId() + "-" + i.getAddressId(), onlineRoomVos);
        });
        // 再根据时段分组
        eeIpMap.forEach((k,v) -> {
            Map<Integer, List<AbNormalData>> sequenceMap = new LinkedHashMap<>();
            v.stream().forEach(i -> {
                List<AbNormalData> onlineRoomVos = sequenceMap.get(i.getSegmentId());
                if(onlineRoomVos == null){
                    onlineRoomVos = new ArrayList<>();
                }
                onlineRoomVos.add(i);
                sequenceMap.put(i.getSegmentId(), onlineRoomVos);
            });
            eeMap.put(k, sequenceMap);
        });
        return eeMap;
    }