import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.*;/*** @Author : JCccc* @CreateTime : /3/27* @Description :**/public class DateTimeUtil {//输入一个时间,获取对应的自然月开始时间 和结束时间public static Map getMonthStartTimeByDate(String dateTime) throws ParseException {SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");Date date = simpleDateFormat.parse(dateTime);long currentTime = date.getTime();String timeZone = "GMT+8:00";Calendar calendar = Calendar.getInstance();// 获取当前日期calendar.setTimeZone(TimeZone.getTimeZone(timeZone));calendar.setTimeInMillis(currentTime);calendar.add(Calendar.YEAR, 0);calendar.add(Calendar.MONTH, 0);calendar.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天calendar.set(Calendar.HOUR_OF_DAY, 0);calendar.set(Calendar.MINUTE, 0);calendar.set(Calendar.SECOND, 0);calendar.set(Calendar.MILLISECOND, 0);long timeInMillis = calendar.getTimeInMillis();Date resultStartDate = new Date(timeInMillis);String resultStartTime = simpleDateFormat.format(resultStartDate);Calendar calendar2 = Calendar.getInstance();// 获取当前日期calendar2.setTimeZone(TimeZone.getTimeZone(timeZone));calendar2.setTimeInMillis(currentTime);calendar2.add(Calendar.YEAR, 0);calendar2.add(Calendar.MONTH, 0);calendar2.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));// 获取当前月最后一天calendar2.set(Calendar.HOUR_OF_DAY, 23);calendar2.set(Calendar.MINUTE, 59);calendar2.set(Calendar.SECOND, 59);calendar2.set(Calendar.MILLISECOND, 999);long timeInMillis2 = calendar2.getTimeInMillis();Date resultEndDate = new Date(timeInMillis2);String resultEndTime = simpleDateFormat.format(resultEndDate);Map map = new HashMap();map.put("startDate", resultStartTime);map.put("endDate", resultEndTime);return map;}//输入一个时间,获取对应的自然年开始时间,结束时间public static Map getYearStartTimeByDate(String dateTime) throws ParseException {SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");Date date = simpleDateFormat.parse(dateTime);GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();gc.setTime(date);Calendar cal = Calendar.getInstance();cal.set(Calendar.YEAR, Integer.valueOf(gc.get(1)));cal.set(Calendar.MONTH, Calendar.JANUARY);cal.set(Calendar.DATE, 1);Long dayStartTime = getDayStartTime(cal.getTime());Date resultStartDate = new Date(dayStartTime);String resultStartTime = simpleDateFormat.format(resultStartDate);Calendar cal2 = Calendar.getInstance();cal2.set(Calendar.YEAR, Integer.valueOf(gc.get(1)));cal2.set(Calendar.MONTH, Calendar.DECEMBER);cal2.set(Calendar.DATE, 31);Long dayEndTime = getDayStartTime(cal2.getTime());Date resultEndDate = new Date(dayEndTime);String resultEndTime = simpleDateFormat.format(resultEndDate);Map map = new HashMap();map.put("startDate", resultStartTime);map.put("endDate", resultEndTime);return map;}public static Long getDayStartTime(Date d) {Calendar calendar = Calendar.getInstance();if (null != d) calendar.setTime(d);calendar.set(calendar.get(Calendar.YEAR),calendar.get(Calendar.MONTH),calendar.get(Calendar.DAY_OF_MONTH), 0, 0, 0);calendar.set(Calendar.MILLISECOND, 0);return calendar.getTimeInMillis();}public static void main(String[] args) throws Exception {Map monthStartTimeByDate = getMonthStartTimeByDate("-03-24");System.out.println(monthStartTimeByDate.toString());Map yearStartTimeByDate = getYearStartTimeByDate("-03-24");System.out.println(yearStartTimeByDate.toString());}}
测试效果：
