- A+
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一、当前年的上一年
核心代码:
public static String getYearBefore() { SimpleDateFormat formats = new SimpleDateFormat("yyyy"); Calendar c = Calendar.getInstance(); c.add(Calendar.YEAR, -1); Date date = c.getTime(); return formats.format(date); }
二、上一季度
核心代码:
/** * 获取上一季度 开始和结束时间 * * @return */public static DateRange getLastQuarter() { Calendar startCalendar = Calendar.getInstance(); startCalendar.set(Calendar.MONTH, ((int) startCalendar.get(Calendar.MONTH) / 3 - 1) * 3); startCalendar.set(Calendar.DAY_OF_MONTH, 1); setMinTime(startCalendar); Calendar endCalendar = Calendar.getInstance(); endCalendar.set(Calendar.MONTH, ((int) endCalendar.get(Calendar.MONTH) / 3 - 1) * 3 + 2); endCalendar.set(Calendar.DAY_OF_MONTH, endCalendar.getActualMaximum(Calendar.DAY_OF_MONTH)); setMaxTime(endCalendar); return new DateRange(startCalendar.getTime(), endCalendar.getTime()); }/** * 最小时间 * * @param calendar */private static void setMinTime(Calendar calendar) { calendar.set(Calendar.HOUR_OF_DAY, 0); calendar.set(Calendar.MINUTE, 0); calendar.set(Calendar.SECOND, 0); calendar.set(Calendar.MILLISECOND, 0); }/** * 最大时间 * * @param calendar */private static void setMaxTime(Calendar calendar) { calendar.set(Calendar.HOUR_OF_DAY, calendar.getActualMaximum(Calendar.HOUR_OF_DAY)); calendar.set(Calendar.MINUTE, calendar.getActualMaximum(Calendar.MINUTE)); calendar.set(Calendar.SECOND, calendar.getActualMaximum(Calendar.SECOND)); calendar.set(Calendar.MILLISECOND, calendar.getActualMaximum(Calendar.MILLISECOND)); }
DateRange.java:
@Data @NoArgsConstructor @AllArgsConstructorpublic class DateRange { private Date start; private Date end; }
三、当月
核心代码:
/** * 获取当月(开始时间) * * @return */ public static String getCurrentMonthStartDate() { // 获取当前年份、月份、日期 Calendar cale = null; // 获取当月第一天 SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd"); String firstday; cale = Calendar.getInstance(); cale.add(Calendar.MONTH, 0); cale.set(Calendar.DAY_OF_MONTH, 1); firstday = format.format(cale.getTime()); return firstday; } /** * 获取当月(结束时间) * * @return */ public static String getCurrentMonthEndDate() { // 获取当前年份、月份、日期 Calendar cale = null; // 获取当月最后一天 SimpleDateFormat format = new SimpleDateFormat("yyyyMMdd"); String lastday; cale = Calendar.getInstance(); cale.add(Calendar.MONTH, 1); cale.set(Calendar.DAY_OF_MONTH, 0); lastday = format.format(cale.getTime()); return lastday; }
四、当季
核心代码:
/** * 获取当季 * * @return */ public static DateRange getThisQuarter() { Calendar startCalendar = Calendar.getInstance(); startCalendar.set(Calendar.MONTH, ((int) startCalendar.get(Calendar.MONTH) / 3) * 3); startCalendar.set(Calendar.DAY_OF_MONTH, 1); setMinTime(startCalendar); Calendar endCalendar = Calendar.getInstance(); endCalendar.set(Calendar.MONTH, ((int) startCalendar.get(Calendar.MONTH) / 3) * 3 + 2); endCalendar.set(Calendar.DAY_OF_MONTH, endCalendar.getActualMaximum(Calendar.DAY_OF_MONTH)); setMaxTime(endCalendar); return new DateRange(startCalendar.getTime(), endCalendar.getTime()); }