Java中获取指定日为星期几及其他日期操作(二)
DateFormat("EEEE");
String week = sdf.format(date);
return week;
}
// 取得日期是某年的第几周
public static int getWeekOfYear(Date date) {
Calendar cal = Calendar.getInstance();
cal.setTime(date);
int week_of_year = cal.get(Calendar.WEEK_OF_YEAR);
return week_of_year;
}
// 取得某个月有多少天
public static int getDaysOfMonth(int year, int month) {
Calendar cal = Calendar.getInstance();
cal.set(Calendar.YEAR, year);
cal.set(Calendar.MONTH, month-1);
int days_of_month = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
return days_of_month;
} www.2cto.com
// 取得两个日期之间的相差多少天
public static long getDaysBetween(Date date0, Date date1) {
long daysBetween = (date0.getTime() - date1.getTime() + 1000000) / 86400000;// 86400000=3600*24*1000 用立即数，减少乘法计算的开销
return daysBetween;
}
}
6、测试结果
