Java 将两个日期的时间段按照一定天数进行周期切割

曾经终败给现在 2023-07-06 08:55 2阅读 0赞

上代码：

public  static List<CycleTimeVo> getCycleList(int cycleNum,String startTime,String endTime) throws ParseException {
            System.out.println("统计的时间段为：从"+startTime+"到"+endTime);
            Date endParse = new SimpleDateFormat("yyyy-MM-dd").parse(endTime);
            Long endLong = endParse.getTime();
    
            SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");//这个是你要转成后的时间的格式
            endTime = sdf.format(new Date(endLong));
            System.out.println("结束时间是："+endTime);
    
            int daysBetweenNum = daysBetween(startTime, endTime);
            int cycleForNum = daysBetweenNum % cycleNum == 0 ? (daysBetweenNum / cycleNum) : (daysBetweenNum / cycleNum) + 1;
            System.out.println("两日期间相隔的天数为：" + daysBetweenNum);
            System.out.println("周期选择是：" + cycleNum + "天一周期, 则切割出来的周期存在个数：" + cycleForNum);
            Date startParse = new SimpleDateFormat("yyyy-MM-dd").parse(startTime);
            Long startLong = startParse.getTime();
    
            Long calculationLong = startLong;
    
            List<CycleTimeVo> CycleTimeList=new ArrayList();
            for (int i = 1; i <= cycleForNum; i++) {
    
                String startStr = sdf.format(new Date(calculationLong));
                Date startStrParse = new SimpleDateFormat("yyyy-MM-dd").parse(startStr);
                Long startStrLong = startStrParse.getTime();
                Long cycleLong = cycleNum*86400000l;
                calculationLong = startStrLong + cycleLong;
                String endStr = endTime;
                if (calculationLong <= endLong) {
                    endStr = sdf.format(new Date(calculationLong));
                }
                System.out.println("起始:" + startStr + "结束：" + endStr);
                CycleTimeVo cycleTimeVo=new CycleTimeVo();
                cycleTimeVo.setStartTimeStr(startStr);
                cycleTimeVo.setEndTimeStr(endStr);
                CycleTimeList.add(cycleTimeVo);
            }
            System.out.println("周期list："+CycleTimeList.toString());
            return CycleTimeList;
        }
    
        public static int daysBetween(String smdate, String bdate) throws ParseException {
    
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            Calendar cal = Calendar.getInstance();
            cal.setTime(sdf.parse(smdate));
            long time1 = cal.getTimeInMillis();
            cal.setTime(sdf.parse(bdate));
            long time2 = cal.getTimeInMillis();
            long between_days = (time2 - time1) / (1000 * 3600 * 24);
            return Integer.parseInt(String.valueOf(between_days));
    
        }

测试结果：

第一个参数为周期的天数，这里示例为7天一个周期切割，

getCycleList(7,"2020-02-01","2020-02-14");

可以看到结果正确：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Mzg3OTQw_size_16_color_FFFFFF_t_70][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Mzg3OTQw_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200217143555437.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Mzg3OTQw,size_16,color_FFFFFF,t_70