[JAVA 获取某天、某周、某月、某年的开始时间和结束时间]

原文参考地址:JAVA 获取某天、某周、某月、某年的开始时间和结束时间

import java.util.Calendar;import java.util.Date;public class DateUtil {/*** 获取指定天的开始时间* @return*/public static Date getStartTimeOfCurrentDay(Date date){Calendar calendar = Calendar.getInstance();calendar.clear();calendar.setTime(date);setMinTimeOfDay(calendar);return calendar.getTime();}/*** 获取指定天的结束时间* @return*/public static Date getEndTimeOfCurrentDay(Date date){Calendar calendar = Calendar.getInstance();calendar.clear();calendar.setTime(date);setMaxTimeOfDay(calendar);return calendar.getTime();}/*** 获取指定周的开始时间* @return*/public static Date getStartTimeOfCurrentWeek(Date date){Calendar calendar = Calendar.getInstance();calendar.clear();calendar.setTime(date);calendar.setFirstDayOfWeek(Calendar.MONDAY);calendar.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);setMinTimeOfDay(calendar);return calendar.getTime();}/*** 获取指定月的结束时间* @return*/public static Date getEndTimeOfCurrentWeek(Date date){Calendar calendar = Calendar.getInstance();calendar.clear();calendar.setTime(date);calendar.setFirstDayOfWeek(Calendar.MONDAY);calendar.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);setMaxTimeOfDay(calendar);return calendar.getTime();}/*** 获取指定月的开始时间* @return*/public static Date getStartTimeOfCurrentMonth(Date date){Calendar calendar = Calendar.getInstance();calendar.clear();calendar.setTime(date);calendar.set(calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),1);setMinTimeOfDay(calendar);return calendar.getTime();}/*** 获取指定月的结束时间* @return*/public static Date getEndTimeOfCurrentMonth(Date date){Calendar calendar = Calendar.getInstance();calendar.clear();calendar.setTime(date);int maxMonthDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);calendar.set(calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),maxMonthDay);setMaxTimeOfDay(calendar);return calendar.getTime();}/*** 获取指定年的开始时间 注意月份要减1* @return*/public static Date getStartTimeOfCurrentYear(Date date){Calendar calendar = Calendar.getInstance();calendar.clear();calendar.setTime(date);calendar.set(calendar.get(Calendar.YEAR),0,1);setMinTimeOfDay(calendar);return calendar.getTime();}/*** 获取指定年的结束时间 注意月份要减1* @return*/public static Date getEndTimeOfCurrentYear(Date date){Calendar calendar = Calendar.getInstance();calendar.clear();calendar.setTime(date);calendar.set(calendar.get(Calendar.YEAR),11,31);setMaxTimeOfDay(calendar);return calendar.getTime();}/*** 设置当天的开始时间* @param calendar*/private static void setMinTimeOfDay(Calendar calendar) {calendar.set(Calendar.HOUR_OF_DAY, 0);calendar.set(Calendar.SECOND, 0);calendar.set(Calendar.MINUTE, 0);calendar.set(Calendar.MILLISECOND, 0);}/*** 设置当天的结束时间* @param calendar*/private static void setMaxTimeOfDay(Calendar calendar) {calendar.set(Calendar.HOUR_OF_DAY, 23);calendar.set(Calendar.SECOND, 59);calendar.set(Calendar.MINUTE, 59);calendar.set(Calendar.MILLISECOND, 999);}}

测试部分:

Date nowTime = new Date();System.out.println("当前时间："+nowTime);Date currentDayStartTime = DateUtil.getStartTimeOfCurrentDay(nowTime);Date currentDayEndTime = DateUtil.getEndTimeOfCurrentDay(nowTime);System.out.println("当天开始时间："+currentDayStartTime+"当天结束时间："+currentDayEndTime);Date currentWeekStartTime = DateUtil.getStartTimeOfCurrentWeek(nowTime);Date currentWeekEndTime = DateUtil.getEndTimeOfCurrentWeek(nowTime);System.out.println("当周开始时间："+currentWeekStartTime+"当周结束时间："+currentWeekEndTime);Date currentMonthStartTime = DateUtil.getStartTimeOfCurrentMonth(nowTime);Date currentMonthEndTime = DateUtil.getEndTimeOfCurrentMonth(nowTime);System.out.println("当月开始时间："+currentMonthStartTime+"当月结束时间："+currentMonthEndTime);Date currentYearStartTime = DateUtil.getStartTimeOfCurrentYear(nowTime);Date currentYearEndTime = DateUtil.getEndTimeOfCurrentYear(nowTime);System.out.println("当年开始时间："+currentYearStartTime+"当年结束时间："+currentYearEndTime);结果如下：当前时间：Wed Jun 23 10:27:03 CST 当天开始时间：Wed Jun 23 00:00:00 CST 当天结束时间：Wed Jun 23 23:59:59 CST 当周开始时间：Mon Jun 21 00:00:00 CST 当周结束时间：Sun Jun 27 23:59:59 CST 当月开始时间：Tue Jun 01 00:00:00 CST 当月结束时间：Wed Jun 30 23:59:59 CST 当年开始时间：Fri Jan 01 00:00:00 CST 当年结束时间：Fri Dec 31 23:59:59 CST