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java减月份

发布时间:2024-04-27 23:19:47

‘壹’ java月份相减

/**
* @param args
*/
public static Integer getDiffNum(Date startMonth,Date endMonth){


Integer monthNum = 0;
Integer yearNumber = 0;
Calendar startCalendar = Calendar.getInstance();
Calendar endCalendar = Calendar.getInstance();

startCalendar.setTime(startMonth);
endCalendar.setTime(endMonth);

yearNumber = endCalendar.get(endCalendar.YEAR) - startCalendar.get(endCalendar.YEAR);
monthNum = endCalendar.get(Calendar.MONTH) - startCalendar.get(Calendar.MONTH);

return yearNumber*12 + monthNum;
}

已经测试

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publicstaticvoidmain(String[]args){
SimpleDateFormatsdf=newSimpleDateFormat("yyyy/MM/ddHH:mm:ss");
Datedate=newDate();
System.out.println(sdf.format(date));
System.out.println(sdf.format(subtractMarch(date,6)));
}
//鍑忔湀浠
publicstaticDatesubtractMarch(Datedate,intnum){
Calendarcal=Calendar.getInstance();
cal.setTime(date);
cal.set(Calendar.MARCH,cal.get(Calendar.MARCH)-num);
returncal.getTime();
}

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