在第4行代码(忽略空白和评论)和超出我计算两个日期之间的月份差异.这个工作,但看起来有点黑客.有没有更好的办法？
int handleAllowance(LocalDate today) {
int allowance = membership.allowance();
if (allowance == 0) return 0;
// if update was last month (or earlier)
int months = today.monthOfYear().getMaximumValue() - today.monthOfYear().getMinimumValue(); // yeah,12,but just to be 100% correct :-)
int curMonth = (today.getYear() * months) + today. getMonthOfYear();
int updMonth = (lastAllowanceUpdate.getYear() * months) + lastAllowanceUpdate.getMonthOfYear();
if (curMonth > updMonth) {
// ...and if today is on or past update day
int updateDay = Math.min(allowanceDay,today.dayOfMonth().getMaximumValue());
if (today.getDayOfMonth() >= updateDay) {
// number of months to give allowance (in the rare case this process fails to run for 2 months or more)
int allowanceMonths = curMonth - updMonth;
// give credits
final int totalAllowance = allowance * allowanceMonths;
giveCredits(totalAllowance);
// update day
lastAllowanceUpdate = lastAllowanceUpdate.plusMonths(allowanceMonths);
// return the allowance given
return totalAllowance;
}
}
return 0;
}
解决方法
Months.monthsBetween(
start.withDayOfMonth(1),end.withDayOfMonth(1)).getMonths()
