java list.stream

Posted 2021-05-16 IT的鱼

   list.stream 根据条件筛选

 resList = rfcPlanEntities.getPlanEntityList().stream().filter(o -> o.getOperationStatus().equals("Not Start")).collect(Collectors.toList());

 

 

给字段赋值

 findClockList.stream().forEach(item-> {
                    try {
                        item.setPunchTypeStr(RfcClockNodeEnum.byCode(item.getPunchType()).getDesc());
                    } catch (NoSuchEnumApplicationException e) {
                        e.printStackTrace();
                    }
                });// 对查询出来的list统一赋值

 

根据字段分组

    maps = safeguardList.stream().collect(Collectors.groupingBy(
                    (Map m) -> (String) m.get("USERNAME")));