int 做除法运算数据丢失【BigDecimal 重现数字】

最新推荐文章于 2024-06-04 16:10:04 发布

weixin_34032792

最新推荐文章于 2024-06-04 16:10:04 发布

阅读量516

点赞数

CC 4.0 BY-SA版权

文章标签：移动开发 python

原文链接：https://my.oschina.net/kuchawyz/blog/3059042

2019独角兽企业重金招聘Python工程师标准>>>

部分代码如：

//组装数据
       all.forEach(a->{
           Optional<WetListVO> re = reWetL.stream().
                   filter(b->b.getDate().equals( a.getDate())).findFirst();
           if(re.isPresent()){
               a.setResidentWetCount(re.get().getResidentWetCount());
               a.setResidentWetNum(re.get().getResidentWetNum());
           }
           Optional<WetListVO> bu = buWetL.stream().
                   filter(b->b.getDate().equals(a.getDate())).findFirst();
           if(bu.isPresent()){
               a.setResidentBucketCount(bu.get().getResidentBucketCount());
               a.setResidentBucketNum(bu.get().getResidentBucketNum());
           }
           // 计算厨余重量
           List<WetListVO> wedateL = wetL.stream().filter(b->b.getDate().equals(a.getDate()))
                   .collect(Collectors.toList());
           Map<Integer,List<WetListVO>> stationGroup = wedateL.stream()
                   .collect(Collectors.groupingBy(WetListVO::getStationId));
           double kitchenWeight = 0;
           for(Entry<Integer,List<WetListVO>> entry :stationGroup.entrySet()){
               List<WetListVO> stationList = entry.getValue();
               int totalHouseholds = stationList.stream().
                       mapToInt(WetListVO::getVillageHouseHolds).sum();
               int villageHouseHolds = stationList.stream().filter(s->s.getuVillageId() >0)
                       .collect(Collectors.toList()).stream()
                       .mapToInt(WetListVO::getVillageHouseHolds).sum();
               //BigDecimal
               kitchenWeight = kitchenWeight + new BigDecimal(villageHouseHolds).doubleValue()/
                       totalHouseholds*stationList.get(0).getKitchenWeight();
           }
           a.setKitchenWeight(new BigDecimal(kitchenWeight).
                   setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue());
       });