JAVA获取当前时间或传入时间的年月日

1.JAVA获取当前时间的年月日

Calendar cal = Calendar.getInstance();
int year = cal.get(Calendar.YEAR);
int month = cal.get(Calendar.MONTH ) + 1;//获取到0-11，与我们正常的月份差1
int day = cal.get(Calendar.HOUR_OF_DAY);

2.JAVA获取指定时间的年月

private String getYearMonthDate(String str){
    SimpleDateFormat sdf= new SimpleDateFormat("yyyy-MM");
    Date date = null;
    try {
        date = sdf.parse(str);
    } catch (ParseException e) {
        e.printStackTrace();
    }
    Calendar calendar = Calendar.getInstance();
    calendar.setTime(date);
    calendar.add(calendar.MONTH);
    int year = calendar.get(Calendar.YEAR);
    int month = calendar.get(Calendar.MONTH) + 1;
    return month < 10 ? year + "-0" + month : year + "-" + month;
}

 

原作者：https://blog.csdn.net/qq_34926773/article/details/80008007