jdk8对list的各种处理实例详解，包括去重，排序，过滤，分组，统计

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https://blog.youkuaiyun.com/qq_33142257/article/details/62891612

 

//个别名字对应不上，故意的

if(null != list&& list.size() >= 1){
            //2,根据客户编号分组
            Map<String*//*客户编号*//*, Map<String*//*组合编号*//*, List<ImportVo>>> groupMap = list.stream().collect(Collectors.groupingBy(t -> t.getKehubianhao(), Collectors.groupingBy(t -> t.getZuhebianhao())));
            //取出按照客户编号分组后的数据
            for(Map.Entry<String, Map<String*//*组合编号*//*, List<ImportVo>>> investorIdMap : groupMap.entrySet()){
                //取出组合策略编号分组后的数据
                for(Map.Entry<String,List<ImportVo>> adviserNoMap : investorIdMap.getValue().entrySet()){
                    List<ImportVo> listGroup =  adviserNoMap.getValue();
                    //按照申请时间排序
                    List<ImportVo> sortList = listGroup.stream().sorted(Comparator.comparingInt(a -> Integer.parseInt(a.getApplyTime()))).collect(Collectors.toList());
//                    List<ImportVo> sortList = listGroup.stream().sorted((a, b) -> Integer.parseInt(a.getApplyTime()) - Integer.parseInt(b.getApplyTime())).collect(Collectors.toList());
                    //过滤申请时间小于首次出现是否全赎为1的时间
                    List<ImportVo> filterList = sortList.stream().filter(t -> Integer.parseInt(t.getIsAllRedeem()) != 1).collect(Collectors.toList());
                    String isAllRedeemApplyTime = "";
                    if(null != filterList && filterList.size() >= 1){
                        isAllRedeemApplyTime = filterList.get(0).getApplyTime();

                    }
                }
            }
            //3,根据日期排列大小
            //4,查询是否有条件为全赎的数据
            //5,如果没有，则正常修改
        }