java 中关于日历的一些方法

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获取当月的所有天http://www.cnblogs.com/maowang1991/archive/2012/12/29/2838919.html

private List<String> getDays() {    List<String> list = new ArrayList<>();    GregorianCalendar now = new GregorianCalendar();    int month = now.get(Calendar.MONTH);    int today = now.get(Calendar.DAY_OF_MONTH);    Log.d("Debug","当月："+month+",当天："+today);    int intent = 0;    now.set(Calendar.DAY_OF_MONTH, 1);    int week = now.get(Calendar.DAY_OF_WEEK);    int firstDayOfWeek = now.getFirstDayOfWeek();    while (firstDayOfWeek != week) {        ++intent;        now.add(Calendar.DAY_OF_MONTH, -1);        week = now.get(Calendar.DAY_OF_WEEK);    }    String[] weekdayNames = new DateFormatSymbols().getShortWeekdays();    do {        System.out.printf("%4s", weekdayNames[week]);        now.add(Calendar.DAY_OF_MONTH, 1);        week = now.get(Calendar.DAY_OF_WEEK);    } while (week != firstDayOfWeek);    System.out.println();    Log.d("debug","这个月改缺少："+intent+"天");    for (int i = 0; i < intent; ++i) {        System.out.print("    ");    }    now.set(Calendar.DAY_OF_MONTH, 1);    week = now.get(Calendar.DAY_OF_WEEK);    int day = now.get(Calendar.DAY_OF_MONTH);    do {        System.out.printf("%3s", day);        list.add(day + "");        if (today == day) {            System.out.print("*");        } else {            System.out.print(" ");        }        now.add(Calendar.DAY_OF_MONTH, 1);        week = now.get(Calendar.DAY_OF_WEEK);        day = now.get(Calendar.DAY_OF_MONTH);        if (week == firstDayOfWeek) {            System.out.println();        }    } while (month == now.get(Calendar.MONTH));    if (week != firstDayOfWeek) {        System.out.println();    }    return list;}

根据年月日获取指定月份的所有天

private void  sss(){    String date = "2016-06-12";    int[] daysInMonth = getMonthDays(date,0);    Log.d("Debug","日期的长度："+daysInMonth.length);    for(int value: daysInMonth){        Log.d("Debug",value + " ");    }}private static int[] getMonthDays(String date,int deleOrAdd) {    Calendar calendar = Calendar.getInstance();    calendar.set(Calendar.YEAR, Integer.parseInt(date.substring(0, 4)));    calendar.set(Calendar.MONTH, Integer.parseInt(date.substring(5, 7)) -1+deleOrAdd);    int maxDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);    int[] days = new int[maxDay];    for(int i = 1; i <= maxDay; i++){        days[i-1] = i;    }    return days;}

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