获取当月日历中的所有日期 [英] Get all dates in calendar in current month
问题描述
如何获取当前/某月日历中的所有日期?例如本月的
,例如图片
How to get all dates in the calendar in current/some month? for example for this month, like the picture
因此,结果是[ 07-31-2016, 08-01-2016, 2016年8月2日 ... ... 2016年8月31日, 2016年9月1日, 2016年9月2日, 2016年3月9日]
So the result is ["07-31-2016", "08-01-2016", "08-02-2016" ... "08-31-2016", "09-01-2016", "09-02-2016", "09-03-2016"]
有什么想法吗?,请先谢谢。
Any ideas?, thanks in advance.
推荐答案
好吧,用 Calendar
及其常量您可以轻松实现:
Well, with Calendar
and its constants you can achieve this quite easy:
给出月
和年
获取每月的第一天并将日历放在星期一:
Given month
and year
get first day of the month and place calendar on monday:
Calendar start = Calendar.getInstance();
start.set(MONTH, month - 1); // month is 0 based on calendar
start.set(YEAR, year);
start.set(DAY_OF_MONTH, 1);
start.getTime(); // to avoid problems getTime make set changes apply
start.set(DAY_OF_WEEK, SUNDAY);
if (start.get(MONTH) <= (month - 1)) // check if sunday is in same month!
start.add(DATE, -7);
给出月
和年
获取月份的最后一天并将日历移至星期日
Given month
and year
get last day of month and move calendar to sunday
Calendar end = Calendar.getInstance();
end.set(MONTH, month); // next month
end.set(YEAR, year);
end.set(DAY_OF_MONTH, 1);
end.getTime(); // to avoid problems getTime make set changes apply
end.set(DATE, -1);
end.set(DAY_OF_WEEK, SATURDAY);
if (end.get(MONTH) != month)
end.add(DATE, + 7);
测试:
public static void main(String[] args) {
int month = 8, year = 2016;
Calendar start = Calendar.getInstance();
start.set(MONTH, month - 1); // month is 0 based on calendar
start.set(YEAR, year);
start.set(DAY_OF_MONTH, 1);
start.getTime();
start.set(DAY_OF_WEEK, SUNDAY);
if (start.get(MONTH) <= (month - 1))
start.add(DATE, -7);
System.out.println(printCalendar(start));
Calendar end = Calendar.getInstance();
end.set(MONTH, month); // next month
end.set(YEAR, year);
end.set(DAY_OF_MONTH, 1);
end.getTime();
end.set(DATE, -1);
end.set(DAY_OF_WEEK, SATURDAY);
start.getTime();
if (end.get(MONTH) != month)
end.add(DATE, + 7);
System.out.println(printCalendar(end));
}
结合:
import static java.util.Calendar.*;
和
private final static SimpleDateFormat df = new SimpleDateFormat("yyyy/MM/dd");
private static String printCalendar(Calendar c) {
return df.format(c.getTime());
}
输出:
2016/07/31
2016/09/03
有
int month = 5, year = 2015;
输出:
2015/04/26
2015/06/06
现在,只需迭代开始 Calendar
将 +1
添加到 Calendar。
(在示例中,我分几周进行了更清晰的显示): while
循环中的DATE
Now, just iterate over starting Calendar
adding +1
to Calendar.DATE
in a while
loop (in the example I split by weeks to be more clear):
int i = 1;
while (start.before(end)) {
System.out.print(printCalendar(start));
if (i % 7 == 0) { // last day of the week
System.out.println();
i = 1;
} else {
System.out.print(" - ");
i++;
}
start.add(DATE, 1);
}
输出:
2015/04/26 - 2015/04/27 - 2015/04/28 - 2015/04/29 - 2015/04/30 - 2015/05/01 - 2015/05/02
2015/05/03 - 2015/05/04 - 2015/05/05 - 2015/05/06 - 2015/05/07 - 2015/05/08 - 2015/05/09
2015/05/10 - 2015/05/11 - 2015/05/12 - 2015/05/13 - 2015/05/14 - 2015/05/15 - 2015/05/16
2015/05/17 - 2015/05/18 - 2015/05/19 - 2015/05/20 - 2015/05/21 - 2015/05/22 - 2015/05/23
2015/05/24 - 2015/05/25 - 2015/05/26 - 2015/05/27 - 2015/05/28 - 2015/05/29 - 2015/05/30
2015/05/31 - 2015/06/01 - 2015/06/02 - 2015/06/03 - 2015/06/04 - 2015/06/05 - 2015/06/06
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