Date类的getYear(),getMonth过时，现在的获取方法

已知一个时间 Date businessDateTime 已知

1 Calendar cal = Calendar.getInstance();
2 cal.setTime(businessDateTime);
3 int year = cal.get(Calendar.YEAR);
4 int month = cal.get(Calendar.MONTH) + 1;

 获取当前月具有的天数：

1 Integer dayCount = LocalDate.now().withMonth(localDate.getMonthValue()).lengthOfMonth();