importjava.text.SimpleDateFormat;importjava.util.Calendar;importjava.util.Date;publicclassWeekOfMonthCalculator{publicstaticintgetWeekOfMonth(Datedate){Calendarcalendar=Calendar.getInstance();calendar.setTime(date);intdayOfWeek=calendar.get(Calendar.DAY_OF_WEEK);intdayOfMonth=calendar.get(Calendar.DAY_OF_...
根据当前日期计算是本月的第几周,需要先判断当前日期是星期几,然后再计算是第几周。代码如下: // 获取当前日期是星期几intdayOfWeek=cal.get(Calendar.DAY_OF_WEEK);// 计算是第几周intweekOfMonth=(dayOfMonth+6-dayOfWeek)/7+1; 1. 2. 3. 4. 5. 三、甘特图 2022-01-012022-01-012022-01-012022-0...
Map<Integer, WeekData> weeks(YearMonth yearMonth) { // 获取指定月份的第一天 LocalDate start = LocalDate.now().with(yearMonth).with(TemporalAdjusters.firstDayOfMonth()); // 获取指定月份的最后一天 LocalDate end = LocalDate.now().with(yearMonth).with(TemporalAdjusters.lastDayOfMonth()); Ma...
intweeks = c.getActualMaximum(Calendar.WEEK_OF_MONTH); LocalDate localDateate = LocalDate.parse(date, dateTimeFormatter); //月份第一周的起始时间和结束时间 LocalDate firstDay = localDateate.with(java.time.DayOfWeek.MONDAY); String firstDayStr = firstDay.format(dateTimeFormatter); String sunStr =...
DAY_OF_WEEK); c.add(Calendar.DATE, 8 - weekday); c.setTime(longSdf.parse(shortSdf.format(c.getTime()) + " 23:59:59.999")); } catch (Exception e) { e.printStackTrace(); } return c.getTime(); } /** * 获得本月的开始时间 * * @return */ public static Date getMonthStart...
getTime(); } // 获得本周日24点时间 public static Date getTimesWeeknight() { Calendar cal = Calendar.getInstance(); cal.setTime(getTimesWeekmorning()); cal.add(Calendar.DAY_OF_WEEK, 7); return cal.getTime(); } // 获得本月第一天0点时间 public static Date getTimesMonthmorning() { ...
getTime(); } // 获得本周日24点时间 public static Date getTimesWeeknight() { Calendar cal = Calendar.getInstance(); cal.setTime(getTimesWeekmorning()); cal.add(Calendar.DAY_OF_WEEK, 7); return cal.getTime(); } // 获得本月第一天0点时间 public static Date getTimesMonthmorning() { ...
SimpleDateFormat format=newSimpleDateFormat(“yyyy-MM-dd”);Calendar c=Calendar.getInstance();c.set(Calendar.DAY_OF_MONTH,1);//设置为1号,当前日期既为本月第一天String monthStart=format.format(c.getTime())+" 00:00:00";System.out.println(monthStart);Calendar ca=Calendar.getInstance();ca.se...
int weekday = c.get(Calendar.DAY_OF_WEEK) - 1; c.add(Calendar.DATE, -weekday); c.setTime(longSdf.parse(shortSdf.format(c.getTime()) + " 00:00:00")); } catch (Exception e) { e.printStackTrace(); } return c.getTime(); ...
在Java中，Calendar类提供了多个用于获取日期信息的变量。DAY_OF_MONTH表示某一天是当月的第几天，数值从1开始。DAY_OF_WEEK则表示某一天是周中的哪一天，返回的值是Calendar类定义的SUNDAY（周日）、MONDAY（周一）、TUESDAY（周二）、WEDNESDAY（周三）、THURSDAY（周四）、FRIDAY（周五）和SATURDAY（周六...