////////////数组中某个字段匹配，N(1)
Map<Integer, String> orgMap = orgList.stream().collect(Collectors.toMap(ESBasOrg::getId, ESBasOrg::getName));

///////////List中某个属性值从0累加
BigDecimal freeAmt = orgValue.stream().map(FudAccountPrepayVO::getFreeAmt).reduce(BigDecimal.ZERO, BigDecimal::add);

//////////排序
List<AdsPrereceiptAmtDetailVO> adsPrereceiptAmtDetailVOS = list.stream()
                    .sorted(Comparator.comparing(AdsPrereceiptAmtDetailVO::getStatDtm))
                    .collect(Collectors.toList());
					
////////// 使用Java 8流来对id相同的对象进行分组和合计money字段
            Map<Integer, BigDecimal> idToTotalMoneyMap = simpleVOList.stream()
                    .collect(Collectors.groupingBy(
                            AcvGdsSimpleVO::getGoodsOrgId,
                            Collectors.mapping(AcvGdsSimpleVO::getStoreCnt, Collectors.reducing(BigDecimal.ZERO, BigDecimal::add))
                    ));
//////////对象去重，并保留一个
            ArrayList<AcvGdsSimpleVO> distinctList = simpleVOList.stream().collect(Collectors.collectingAndThen(
                    Collectors.toCollection(() -> new TreeSet<>(Comparator.comparing(AcvGdsSimpleVO::getGoodsOrgId))), ArrayList::new));
            distinctList.forEach(simpleVO -> {
                simpleVO.setStoreCnt(idToTotalMoneyMap.get(simpleVO.getGoodsOrgId()));
            });
			
			
			
////////// 多字段分组，map的key为数组的情况获取到分组后的数组
			 Map<List<? extends Number>, List<AdsStkGdsOrgBalCnt1dVO>> listMap = list.stream().collect(Collectors.groupingBy(vo -> Arrays.asList(vo.getSkuId(), vo.getOwnOrgId())));
            List<? extends Number> key = new ArrayList<>();
            for (StoStockVO stockVO : stockVOList) {
                key = Arrays.asList(stockVO.getSkuId(), stockVO.getOwnOrgId());
                if (listMap.containsKey(key)) {
                    List<AdsStkGdsOrgBalCnt1dVO> adsStkGdsOrgBalCnt1dVOS = listMap.get(key);
                    if (!CollectionUtils.isEmpty(adsStkGdsOrgBalCnt1dVOS)) {
                        adsStkGdsOrgBalCnt1dVOS.sort(Comparator.comparing(AdsStkGdsOrgBalCnt1dVO::getStatDtm));
                        Optional<AdsStkGdsOrgBalCnt1dVO> first = adsStkGdsOrgBalCnt1dVOS.stream().findFirst();
                        if (stockVO.getSkuId().equals(first.get().getSkuId()) && stockVO.getOwnOrgId().equals(first.get().getOwnOrgId())) {
                            List<LocalDate> dates = new ArrayList<>();
                            adsStkGdsOrgBalCnt1dVOS.forEach(item->{
                                dates.add(LocalDate.parse(item.getStatDtm(), DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));
                            });
                            int count = findLongestConsecutiveDays(dates);
                            stockVO.setNegativeDays(count);
                        }
                    }
                }
            }