場景

求數(shù)據(jù)庫中某記錄的同比昨日增長率。

使用MyBatisPlus的selectCount方法返回的是int類型。

最后需要再轉(zhuǎn)換成百分?jǐn)?shù)表示。

實現(xiàn)

//查詢昨日物流數(shù)SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");Date createTimeDate = simpleDateFormat.parse(createTime);createTimeDate = yesterday(createTimeDate);String formateDate = simpleDateFormat.format(createTimeDate);QueryWrapper<BusLogisticsOrder> BusLogisticsOrderQueryWrapper1 =new QueryWrapper<BusLogisticsOrder>();BusLogisticsOrderQueryWrapper1.eq("deleted_flag","0");BusLogisticsOrderQueryWrapper1.apply("CONVERT(varchar(100), gmt_creat, 23)= '"+formateDate+"'");Integer sumCountYesterDay = busLogisticsOrderMapper.selectCount(BusLogisticsOrderQueryWrapper1);String sumPercent="";if(sumCountYesterDay==0){if(sumCount==0){sumPercent="+0%";}else{sumPercent="+100%";}}else{Double sumPercentNum=0.0;sumPercentNum= Double.valueOf(Double.valueOf((sumCount-sumCountYesterDay))/Double.valueOf(sumCountYesterDay));DecimalFormat df = new DecimalFormat("0.00%");if(sumCount-sumCountYesterDay<0){sumPercent = df.format(sumPercentNum);}else{sumPercent = "+"+df.format(sumPercentNum);}

打斷點查看效果

總結(jié)

以上是生活随笔為你收集整理的Java中int转Double再转换成百分数并应用在求同比昨日增长率的全部內(nèi)容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網(wǎng)站內(nèi)容還不錯，歡迎將生活随笔推薦給好友。