java正确开发系列：使用hutool计算出时间段范围内的每一天

背景：

前端入参分别有startDate和endDate，类型为字符串，格式为：2023-01-01、2023-05-01，需要后端计算出1月到5月的每一天

代码如下：

        String startDateStr = res.getStartDate();
        String endDateStr = res.getEndDate();
        DateTime startDate = DateUtil.parse(startDateStr);
        DateTime endDate = DateUtil.parse(endDateStr);
        LocalDateTime endDateNew = endDate.toLocalDateTime().plusDays(endDate.getLastDayOfMonth() - 1);

        LocalDateTime start = LocalDateTimeUtil.parse(startDate.toLocalDateTime().format(DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss")));
        LocalDateTime end = LocalDateTimeUtil.parse(endDate.toLocalDateTime().format(DateTimeFormatter.ofPattern("yyyy-MM-dd'T'HH:mm:ss")));
        Duration between = LocalDateTimeUtil.between(start, endDateNew);
        long days = between.toDays();
        log.info("相差天数 = " + days);

        // int startMonth = startDate.month() + 1;
        int endMonth = endDate.month() + 1;

        while (!start.isAfter(end)) {
            for (int i = 0; i < endMonth; i++) {
                // int monthDays = startDate.getLastDayOfMonth();
                int monthDays = DateUtil.parse(start.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"))).getLastDayOfMonth();
                for (int j = 0; j < monthDays; j++) {
                    log.info("month = " + (i+1) + ", monthDays = " + monthDays + ", start = " + start + ", days = " + days);
                    start = start.plusDays(1);
                    days--;
                    if (days < 0) {
                        break;
                    }
                }
            }
        }