日期工具类TimeUtil

/**
 * 超详细的时间工具类
 * @author Administrator
 *
 */
public class TimeUtil {
     
	private static Logger logger=LoggerFactory.getLogger(TimeUtil.class);
    private static Random random = new SecureRandom();

    //====借助Calendar类获取今天、昨天、本周、上周、本年及特定时间的开始时间和结束时间（返回类型为date类型）==== 
    /**
     * 获取当天开始时间
     * @return
     */
    public static Date getDayBegin(){
        Calendar cal=Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, 0);//0点
        cal.set(Calendar.MINUTE, 0);//0分
        cal.set(Calendar.SECOND, 0);//0秒
        cal.set(Calendar.MILLISECOND, 0);//0毫秒
        return cal.getTime();
    }     
     
    /**
     * 获取当天结束时间
     * @return
     */
    public static Date getDayEnd(){
        Calendar cal=Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, 23);//23点
        cal.set(Calendar.MINUTE, 59);//59分
        cal.set(Calendar.SECOND, 59);//59秒
        return cal.getTime();
    }    
     
    /**
     * 获取昨天开始时间
     * @return
     */
    public static Date getBeginDayOfYesterday(){
        Calendar cal=Calendar.getInstance();
        cal.setTime(getDayBegin());//当天开始时间
        cal.add(Calendar.DAY_OF_MONTH, -1);//当天月份天数减1
        return cal.getTime();
    }    
     
    /**
     * 获取昨天结束时间
     * @return
     */
    public static Date getEndDayOfYesterday(){
        Calendar cal=Calendar.getInstance();
        cal.setTime(getDayEnd());//当天结束时间
        cal.add(Calendar.DAY_OF_MONTH, -1);//当天月份天数减1
        return cal.getTime();
    }     
     
    /**
     * 获取明天开始时间
     * @return
     */
    public static Date getBeginDayOfTomorrow(){
        Calendar cal=Calendar.getInstance();
        cal.setTime(getDayBegin());//当天开始时间
        cal.add(Calendar.DAY_OF_MONTH, 1);//当天月份天数加1
        return cal.getTime();
    }    
     
    /**
     * 获取明天结束时间
     * @return
     */
    public static Date getEndDayOfTomorrow(){
        Calendar cal=Calendar.getInstance();
        cal.setTime(getDayEnd());//当天结束时间
        cal.add(Calendar.DAY_OF_MONTH, 1);//当天月份天数加1
        return cal.getTime();
    }    
     
    /**
     * 获取某个日期的开始时间
     * @param d
     * @return
     */
    public static Timestamp 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 new Timestamp(calendar.getTimeInMillis());
    }

    /**
     * 获取某个日期的开始时间
     * @param d
     * @return
     */
    public static Date getDayStartTime(String d) {
        Calendar calendar=Calendar.getInstance();
        if(null!=d){
            calendar.setTime(StringToDate(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.getTime();
    }
     
    /**
     * 获取某个日期的结束时间
     * @param d
     * @return
     */
    public static Timestamp getDayEndTime(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), 23, 59, 59);
        calendar.set(Calendar.MILLISECOND, 999);
        return new Timestamp(calendar.getTimeInMillis());
    }
    
    /**
     * 获取一个日期的1年前
     * @return
     */
    public static Date getBeforeYear(Date date) {
        Calendar specialDate = Calendar.getInstance();
        specialDate.setTime(date); //注意在此处将 specialDate 的值改为特定日期
        specialDate.add(Calendar.YEAR, -1); //特定时间的1年前
        return specialDate.getTime();
    }

    /**
     * 获取一个日期的1年后
     * @return
     */
    public static Date getAfterYear(Date date) {
        Calendar specialDate = Calendar.getInstance();
        specialDate.setTime(date); //注意在此处将 specialDate 的值改为特定日期
        specialDate.add(Calendar.YEAR, 1); //特定时间的1年后
        return specialDate.getTime();
    }

    /**
     * 获取某个日期的结束时间
     * @param d
     * @return
     */
    public static Date getDayEndTime(String d) {
        Calendar calendar=Calendar.getInstance();
        if(null!=d){
            calendar.setTime(strToDate(d));
        }
        calendar.set(calendar.get(Calendar.YEAR),
                calendar.get(Calendar.MONTH),
                calendar.get(Calendar.DAY_OF_MONTH), 23, 59, 59);
        calendar.set(Calendar.MILLISECOND, 999);
        return calendar.getTime();
    }

    /**
     * 获取本周的开始时间
     * @return
     */
    @SuppressWarnings("unused")
    public static Date getBeginDayOfWeek(){
        Date date=new Date();

        Calendar cal=Calendar.getInstance();
        cal.setTime(date);
        int dayOfWeek=cal.get(Calendar.DAY_OF_WEEK);
        if(dayOfWeek==1){
            dayOfWeek+=7;
        }
        cal.add(Calendar.DATE, 2-dayOfWeek);
        return getDayStartTime(cal.getTime());
    }    
     
    /**
     * 获取本周的结束时间
     * @return
     */
    public static Date getEndDayOfWeek(){
        Calendar cal=Calendar.getInstance();
        cal.setTime(getBeginDayOfWeek());
        cal.add(Calendar.DAY_OF_WEEK, 6);
        Date weekEndSta = cal.getTime();
        return getDayEndTime(weekEndSta);
    }     
     
    /**
     * 获取上周开始时间
     */
    @SuppressWarnings("unused")
    public static Date getBeginDayOfLastWeek() {
        Date date=new Date();

        Calendar cal=Calendar.getInstance();
        cal.setTime(date);
        int dayofweek=cal.get(Calendar.DAY_OF_WEEK);
        if (dayofweek==1) {
            dayofweek+=7;
        }
        cal.add(Calendar.DATE, 2-dayofweek-7);
        return getDayStartTime(cal.getTime());
    }     
     
    /**
     * 获取上周的结束时间
     * @return
     */
    public static Date getEndDayOfLastWeek(){
        Calendar cal=Calendar.getInstance();
        cal.setTime(getBeginDayOfLastWeek());
        cal.add(Calendar.DAY_OF_WEEK, 6);
        Date weekEndSta = cal.getTime();
        return getDayEndTime(weekEndSta);
    }     
     
    /**
     * 获取今年是哪一年
     * @return
     */
    public static Integer getNowYear(){
        Date date = new Date();
        GregorianCalendar gc=(GregorianCalendar)Calendar.getInstance();
        gc.setTime(date);
        return Integer.valueOf(gc.get(1));
    }     
     
    /**
     * 获取本月是哪一月
     * @return
     */
    public static int getNowMonth() {
        Date date = new Date();
        GregorianCalendar gc=(GregorianCalendar)Calendar.getInstance();
        gc.setTime(date);
        return gc.get(2) + 1;
    }     
     
    /**
     * 获取本月的开始时间
     * @return
     */
    public static Date getBeginDayOfMonth() {
        Calendar calendar=Calendar.getInstance();
        calendar.set(getNowYear(), getNowMonth()-1, 1);
        return getDayStartTime(calendar.getTime());
    }    
     
    /**
     * 获取本月的结束时间
     * @return
     */
    public static Date getEndDayOfMonth() {
        Calendar calendar=Calendar.getInstance();
        calendar.set(getNowYear(), getNowMonth()-1, 1);
        int day = calendar.getActualMaximum(5);
        calendar.set(getNowYear(), getNowMonth()-1, day);
        return getDayEndTime(calendar.getTime());
    } 
    
    /**
     * 获取上月的开始时间
     * @return
     */
    public static Date getBeginDayOfLastMonth() {
        Calendar calendar=Calendar.getInstance();
        calendar.set(getNowYear(), getNowMonth()-2, 1);
        return getDayStartTime(calendar.getTime());
    }
     
     
    /**
     * 获取上月的结束时间
     * @return
     */
    public static Date getEndDayOfLastMonth() {
        Calendar calendar=Calendar.getInstance();
        calendar.set(getNowYear(), getNowMonth()-2, 1);
        int day = calendar.getActualMaximum(5);
        calendar.set(getNowYear(), getNowMonth()-2, day);
        return getDayEndTime(calendar.getTime());
    }
       
    /**
     * 获取本年的开始时间
     * @return
     */
    public static Date getBeginDayOfYear() {
        Calendar cal=Calendar.getInstance();
        cal.set(Calendar.YEAR, getNowYear());
        cal.set(Calendar.MONTH, Calendar.JANUARY);
        cal.set(Calendar.DATE, 1);
        return getDayStartTime(cal.getTime());
    }

    //获取传入日期所在年的第一天
    public static Date getFirstDayDateOfYear(final Date date) {
        final Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        final int last = cal.getActualMinimum(Calendar.DAY_OF_YEAR);
        cal.set(Calendar.DAY_OF_YEAR, last);
        return cal.getTime();
    }

    //获取传入日期所在年的最后一天
    public static Date getLastDayOfYear(final Date date) {
        final Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        final int last = cal.getActualMaximum(Calendar.DAY_OF_YEAR);
        cal.set(Calendar.DAY_OF_YEAR, last);
        return cal.getTime();
    }
    
    /**
     * 获得指定日期的前一天
     *
     * @param specifiedDay
     * @return
     * @throws Exception
     */
    public static String getSpecifiedDayBefore(String specifiedDay) {
        Calendar c = Calendar.getInstance();
        Date date = null;
        try {
            date = new SimpleDateFormat("yy-MM-dd").parse(specifiedDay);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        c.setTime(date);
        int day = c.get(Calendar.DATE);
        c.set(Calendar.DATE, day - 1);

        String dayBefore = new SimpleDateFormat("yyyyMM").format(c
                .getTime());
        return dayBefore;
    }

    /**
     * 获取本年的结束时间
     * @return
     */
    public static Date getEndDayOfYear() {
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.YEAR, getNowYear());
        cal.set(Calendar.MONTH, Calendar.DECEMBER);
        cal.set(Calendar.DATE, 31);
        return getDayEndTime(cal.getTime());
    }
    
    /**
     * 两个日期相减得到的天数
     * @param beginDate
     * @param endDate
     * @return
     */
    public static int getDiffDays(Date beginDate, Date endDate) {
        if(beginDate==null||endDate==null) {
            throw new IllegalArgumentException("getDiffDays param is null!");
        }
        double diff=(endDate.getTime()-beginDate.getTime())/(1000d*60d*60d*24d);
        int days = (int) diff;  //new Long(diff).intValue();
        return days;
    }

    /**
     * 两个日期相减得到的毫秒数
     * @param beginDate
     * @param endDate
     * @return
     */
    public static long dateDiff(Date beginDate, Date endDate) {
        long date1ms=beginDate.getTime();
        long date2ms=endDate.getTime();
        return date2ms-date1ms;
    }

    /**
     * 获取两个日期中的最大日起
     * @param beginDate
     * @param endDate
     * @return
     */
    public static Date max(Date beginDate, Date endDate) {
        if(beginDate==null) {
            return endDate;
        }
        if(endDate==null) {
            return beginDate;
        }
        if(beginDate.after(endDate)) {//beginDate日期大于endDate
           return beginDate;
        }
        return endDate;
    }

    /**
     * 获取两个日期中的最小日期
     * @param beginDate
     * @param endDate
     * @return
     */
    public static Date min(Date beginDate, Date endDate) {
        if(beginDate==null) {
            return endDate;
        }
        if(endDate==null) {
            return beginDate;
        }
        if(beginDate.after(endDate)) {
            return endDate;
        }
        return beginDate;
    }

    /**
     * 获取某月该季度的第一个月
     * @param date
     * @return
     */
    public static Date getFirstSeasonDate(Date date) {
        final int[] SEASON={ 1, 1, 1, 2, 2, 2, 3, 3, 3, 4, 4, 4 };
        Calendar cal=Calendar.getInstance();
        cal.setTime(date);
        int sean = SEASON[cal.get(Calendar.MONTH)];
        cal.set(Calendar.MONTH, sean*3-3);
        return cal.getTime();
    }


    /**
     * 根据时间来查询本季度和上季度
     * @param date
     * @param quarter 参数代表季度间隔  0:本季度  1:上季度  2:上上季度
     * @return
     */
    public static Map showQuarter(Date date,Integer quarter){

        //quarter参数代表季度间隔 1为上季度 2为上上季度
        Calendar calendar=Calendar.getInstance();
        //季度开始时间
        calendar.setTime(date);
        calendar.set(Calendar.MONTH, ((int) calendar.get(Calendar.MONTH) / 3 - quarter) * 3);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        setMinTime(calendar);

        //季度结束时间
        Calendar calendar2=Calendar.getInstance();
        calendar2.setTime(date);
        calendar2.set(Calendar.MONTH, ((int) calendar2.get(Calendar.MONTH) / 3 - quarter) * 3 + 2);
        calendar2.set(Calendar.DAY_OF_MONTH, calendar2.getActualMaximum(Calendar.DAY_OF_MONTH));
        setMaxTime(calendar2);

        Map map=new HashMap();
        map.put("startDate",calendar.getTime()); //季度
        map.put("endDate", calendar2.getTime());
        return map;
    }

    /**
     * 返回某个日期下几天的日期
     * @param date
     * @param i
     * @return
     */
    public static Date getNextDay(Date date, int i) {
        Calendar cal=new GregorianCalendar();
        cal.setTime(date);
        cal.set(Calendar.DATE,cal.get(Calendar.DATE)+i);
        return cal.getTime();
    }

    /**
     * 返回某个日期前几天的日期
     * @param date
     * @param i
     * @return
     */
    public static Date getFrontDay(Date date, int i) {
        Calendar cal=new GregorianCalendar();
        cal.setTime(date);
        cal.set(Calendar.DATE, cal.get(Calendar.DATE)-i);
        return cal.getTime();
    }

    /**
   * 获取某年某月按天切片日期集合（某个月间隔多少天的日期集合）
   * @param beginYear
   * @param beginMonth
   * @param k
   * @return
   */
    @SuppressWarnings({ "unchecked", "rawtypes" })
    public static List getTimeList(int beginYear, int beginMonth, int k) {
        List list = new ArrayList();
        Calendar begincal=new GregorianCalendar(beginYear,beginMonth, 1);
        int max = begincal.getActualMaximum(Calendar.DATE);
        for (int i = 1; i < max; i = i + k) {
            list.add(begincal.getTime());
            begincal.add(Calendar.DATE, k);
        }
        begincal = new GregorianCalendar(beginYear, beginMonth, max);
        list.add(begincal.getTime());
        return list;
    }


    /**
     * 获取某年某月到某年某月按天的切片日期集合（间隔天数的集合）
     * @param beginYear
     * @param beginMonth
     * @param endYear
     * @param endMonth
     * @param k
     * @return
     */
    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static List getTimeList(int beginYear,int beginMonth,int endYear,int endMonth, int k) {
        List list = new ArrayList();
        if (beginYear==endYear){
            for(int j=beginMonth;j<=endMonth;j++){
                list.add(getTimeList(beginYear,j,k));
            }
        }else{
                {
                    for(int j=beginMonth;j<12;j++){
                        list.add(getTimeList(beginYear,j,k));
                    }
                    for(int i=beginYear+1;i= startDate.getTime()
                && currentTime <= endDate.getTime()){
            return true;
        }
        return false;
    }

    /**
     * 得到二个日期间的间隔天数
     * @param secondString：后一个日期
     * @param firstString：前一个日期
     * @return
     */
    public static String getTwoDay(String secondString, String firstString) {
        SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
        long day = 0;
        try {
            Date secondTime = myFormatter.parse(secondString);
            Date firstTime = myFormatter.parse(firstString);
            day = (secondTime.getTime() - firstTime.getTime()) / (24 * 60 * 60 * 1000);
        } catch (Exception e) {
            return "";
        }
        return day + "";
    }

    /**
     * 时间前推或后推分钟,其中JJ表示分钟.
     * @param StringTime：时间
     * @param minute：分钟（有正负之分）
     * @return
     */
    public static String getPreTime(String StringTime, String minute) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String mydate1 = "";
        try {
            Date date1 = format.parse(StringTime);
            long Time = (date1.getTime() / 1000) + Integer.parseInt(minute) * 60;
            date1.setTime(Time * 1000);
            mydate1 = format.format(date1);
        } catch (Exception e) {
            return "";
        }
        return mydate1;
    }

    /**
     * 将短时间格式字符串转换为时间 yyyy-MM-dd
     *
     * @param strDate
     * @return
     */
    public static Date strToDate(String strDate) {
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        ParsePosition pos = new ParsePosition(0);
        Date strtodate = formatter.parse(strDate, pos);
        return strtodate;
    }

    /**
     * 将长时间格式字符串转换为时间 yyyy-MM-dd HH:mm:ss
     *
     * @param strDate
     * @return
     */
    public static Date longStrToDate(String strDate){
        SimpleDateFormat sdfmat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        try {
            Date start = sdfmat.parse(strDate);
            return start;
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }

    /**
     * 校验时间格式
     * @param date  字符串类型时间
     * @param dateFormat 时间格式，如yyyy-MM-dd HH:mm:ss、yyyy-MM-dd等等
     * @return
     */
    public static Boolean isDateVail(String date, String dateFormat) {
        DateTimeFormatter dtf = DateTimeFormatter.ofPattern(dateFormat);
        boolean flag = true;
        try {
            LocalDateTime.parse(date, dtf);
        } catch (Exception e) {
            flag = false;
        }
        return flag;
    }

    /**
     * 获取当前日期：yyyy-MM-dd
     * @return
     */
    public static String getCurrentDate() {
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        return simpleDateFormat.format(new Date());
    }

    /**
     * 获取当前日期：yyyy/MM/dd HH:mm:ss
     * @return
     */
    public static String getCurrentDatess() {
        Date now = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");//可以方便地修改日期格式
        return dateFormat.format(now);
    }

    /**
     * 得到一个时间延后或前移几天的时间
     * @param nowdate：时间
     * @param delay：前移或后延的天数
     * @return
     */
    public static String getNextDay(String nowdate, String delay) {
        try{
            SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
            String mdate = "";
            Date d = strToDate(nowdate);
            long myTime = (d.getTime() / 1000) + Integer.parseInt(delay) * 24 * 60 * 60;
            d.setTime(myTime * 1000);
            mdate = format.format(d);
            return mdate;
        }catch(Exception e){
            return "";
        }
    }


    /**
     * 判断是否闰年
     * @param ddate
     * @return
     */
    public static boolean isLeapYear(String ddate) {
        /**
          * 详细设计： 1.被400整除是闰年，否则： 2.不能被4整除则不是闰年 3.能被4整除同时不能被100整除则是闰年
          * 3.能被4整除同时能被100整除则不是闰年
         */
        Date d = strToDate(ddate);
        GregorianCalendar gc = (GregorianCalendar) Calendar.getInstance();
        gc.setTime(d);
        int year = gc.get(Calendar.YEAR);
        if ((year % 400) == 0){
            return true;
        }else if ((year % 4) == 0){
           if ((year % 100) == 0){
               return false;
           }else{
               return true;
           }
        }else{
            return false;
        }
    }


    /**
     * 返回美国时间格式
     * @param str
     * @return
     */
    public static String getEDate(String str) {
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        ParsePosition pos = new ParsePosition(0);
        Date strtodate = formatter.parse(str, pos);
        String j = strtodate.toString();
        String[] k = j.split(" ");
        return k[2] + k[1].toUpperCase() + k[5].substring(2, 4);
    }


    /**
     * 判断二个时间是否在同一个周
     * @param date1
     * @param date2
     * @return
     */
    public static boolean isSameWeekDates(Date date1, Date date2) {
        Calendar cal1 = Calendar.getInstance();
        Calendar cal2 = Calendar.getInstance();
        cal1.setTime(date1);
        cal2.setTime(date2);
        int subYear = cal1.get(Calendar.YEAR) - cal2.get(Calendar.YEAR);
        if(0 == subYear) {
            if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)){
                return true;
            }
        }else if(1 == subYear && 11 == cal2.get(Calendar.MONTH)) {
            // 如果12月的最后一周横跨来年第一周的话则最后一周即算做来年的第一周
            if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)){
                return true;
            }
        }else if (-1 == subYear && 11 == cal1.get(Calendar.MONTH)) {
            if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)){
                return true;
            }
        }
        return false;
    }

    /**
     * 产生周序列,即得到当前时间所在的年度是第几周
     * @return
     */
    public static String getSeqWeek() {
        Calendar c = Calendar.getInstance(Locale.CHINA);
        String week = Integer.toString(c.get(Calendar.WEEK_OF_YEAR));
        if (week.length() == 1)
        week = "0" + week;
        String year = Integer.toString(c.get(Calendar.YEAR));
        return year +"年第"+ week+"周";
    }


    /**
     * 获得一个日期所在的周的星期几的日期，如要找出2002年2月3日所在周的星期一是几号
     * @param sdate：日期
     * @param num：星期几（星期天是一周的第一天）
     * @return
     */
    public static String getWeek(String sdate, String num) {
        // 再转换为时间
        Date dd = strToDate(sdate);
        Calendar c = Calendar.getInstance();
        c.setTime(dd);
        if (num.equals("1")) // 返回星期一所在的日期
        c.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
        else if (num.equals("2")) // 返回星期二所在的日期
        c.set(Calendar.DAY_OF_WEEK, Calendar.TUESDAY);
        else if (num.equals("3")) // 返回星期三所在的日期
        c.set(Calendar.DAY_OF_WEEK, Calendar.WEDNESDAY);
        else if (num.equals("4")) // 返回星期四所在的日期
        c.set(Calendar.DAY_OF_WEEK, Calendar.THURSDAY);
        else if (num.equals("5")) // 返回星期五所在的日期
        c.set(Calendar.DAY_OF_WEEK, Calendar.FRIDAY);
        else if (num.equals("6")) // 返回星期六所在的日期
        c.set(Calendar.DAY_OF_WEEK, Calendar.SATURDAY);
        else if (num.equals("0")) // 返回星期日所在的日期
        c.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
        return new SimpleDateFormat("yyyy-MM-dd").format(c.getTime());
    }


    /**
     * 根据一个日期，返回是星期几的字符串
     * @param sdate
     * @return
     */
    public static String getWeek(String sdate) {
        // 再转换为时间
        Date date = strToDate(sdate);
        Calendar c = Calendar.getInstance();
        c.setTime(date);
        // int hour=c.get(Calendar.DAY_OF_WEEK);
        // hour中存的就是星期几了，其范围 1~7
        // 1=星期日 7=星期六，其他类推
        return new SimpleDateFormat("EEEE").format(c.getTime());
    }


    /**
     * 根据一个日期，返回是星期几的字符串
     * @param sdate
     * @return
     */
    public static String getWeekStr(String sdate){
        String str = "";
        str = getWeek(sdate);
        if("1".equals(str)){
            str = "星期日";
        }else if("2".equals(str)){
            str = "星期一";
        }else if("3".equals(str)){
            str = "星期二";
        }else if("4".equals(str)){
            str = "星期三";
        }else if("5".equals(str)){
            str = "星期四";
        }else if("6".equals(str)){
            str = "星期五";
        }else if("7".equals(str)){
            str = "星期六";
        }
        return str;
    }


    /**
     * 两个时间之间的天数
     * @param date1
     * @param date2
     * @return
     */
    public static long getDays(String date1, String date2) {
        if (date1 == null || date1.equals(""))
            return 0;
        if (date2 == null || date2.equals(""))
            return 0;
        // 转换为标准时间
        SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
        Date date = null;
        Date mydate = null;
        long day = 0;
        try {
            date = myFormatter.parse(date1);
            mydate = myFormatter.parse(date2);
            day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);

        } catch (Exception e) {
        }
        //long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
        return day;
    }
     
     
    /**
     * 形成如下的日历 ， 根据传入的一个时间返回一个结构 星期日 星期一 星期二 星期三 星期四 星期五 星期六 下面是当月的各个时间
     * 此函数返回该日历第一行星期日所在的日期
     * @param sdate
     * @return
     */
    public static String getNowMonth(String sdate) {
        // 取该时间所在月的一号
        sdate = sdate.substring(0, 8) + "01";
        // 得到这个月的1号是星期几
        Date date = strToDate(sdate);
        Calendar c = Calendar.getInstance();
        c.setTime(date);
        int u = c.get(Calendar.DAY_OF_WEEK);
        String newday = getNextDay(sdate, (1 - u) + "");
        return newday;
    }
     
     
    /**
     * 根据用户传入的时间表示格式，返回当前时间的格式 如果是yyyyMMdd，注意字母y不能大写
     * @param sformat
     * @return
     */
    public static String getUserDate(String sformat) {
        Date currentTime = new Date();
        SimpleDateFormat formatter = new SimpleDateFormat(sformat);
        String dateString = formatter.format(currentTime);
        return dateString;
    }
     
     
    /**
     * 返回一个i位数的随机数
     * @param i
     * @return
     */
    public static String getRandom(int i) {
        //Random jjj = new Random();
        // int suiJiShu = jjj.nextInt(9);
        if (i == 0)
            return "";
        String jj = "";
        for (int k = 0; k < i; k++) {
            jj = jj + random.nextInt(9);
        }
        return jj;
    }
     
     
    /**
     * 取得数据库主键 生成格式为yyyymmddhhmmss+k位随机数
     * @param k：表示是取几位随机数，可以自己定
     * @return
     */
    public static String getNo(int k) {
        return getUserDate("yyyyMMddhhmmss") + getRandom(k);
    }
    
    public static String getYearMonth() {
    	SimpleDateFormat format = new SimpleDateFormat("yyyyMM");
        return format.format(new Date());
    }
    
    public static String getlastYearMonth() {
    	SimpleDateFormat format = new SimpleDateFormat("yyyyMM");
        Calendar c = Calendar.getInstance();
        c.setTime(new Date());
        c.add(Calendar.MONTH, -1);
        return format.format(c.getTime());
    }
    public static String getlastYearMonth(String date) {
    	SimpleDateFormat format = new SimpleDateFormat("yyyyMM");
    	Calendar c = Calendar.getInstance();
    	try{
        	c.setTime(format.parse(date));
        	c.add(Calendar.MONTH, -1);
    	}catch(Exception e){
    		logger.error(e.getMessage());
    	}
    	return format.format(c.getTime());
    }
    
    public static String getBeforelastYearMonth() {
    	SimpleDateFormat format = new SimpleDateFormat("yyyyMM");
        Calendar c = Calendar.getInstance();
        c.setTime(new Date());
        c.add(Calendar.MONTH, -2);
        return format.format(c.getTime());
    }
    
    public static List getlast6YearMonth() {
    	List monlist=new ArrayList();
    	for(int i=1;i<=6;i++) {
    		SimpleDateFormat format = new SimpleDateFormat("yyyyMM");
            Calendar c = Calendar.getInstance();
            c.setTime(new Date());
            c.add(Calendar.MONTH, -i);
            monlist.add(format.format(c.getTime()));
    	}
    	Collections.sort(monlist);
        return monlist;
    }
    
    
    public static String getYear(String date,int num) {
    	SimpleDateFormat format = new SimpleDateFormat("yyyy");
    	Calendar c = Calendar.getInstance();
    	try{
        	c.setTime(format.parse(date));
        	c.add(Calendar.YEAR, -num);
    	}catch(Exception e){
    		logger.error(e.getMessage());
    	}
    	return format.format(c.getTime());
    }
    
    public static String getYf(String date,int num) {
    	SimpleDateFormat format = new SimpleDateFormat("yyyyMM");
    	Calendar c = Calendar.getInstance();
    	try{
        	c.setTime(format.parse(date));
        	c.add(Calendar.MONTH, -num);
    	}catch(Exception e){
    		logger.error(e.getMessage());
    	}
    	return format.format(c.getTime());
    }
    
    //往前面推多少个月都包含在里面(num=6 包含输入月份 总共6个)
    public static List getYfs(String date,int num) {
    	List list=new ArrayList();
    	SimpleDateFormat format = new SimpleDateFormat("yyyyMM");
    	Calendar c = Calendar.getInstance();
    	try{
    		for(int i=0;i getYfsl(String date,int num ,int lastYear) {
        List list=new ArrayList();
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM");
        Calendar c = Calendar.getInstance();
        try{
            for(int i=0;i list=new ArrayList();
    	SimpleDateFormat format = new SimpleDateFormat("yyyyMM");
    	Calendar c = Calendar.getInstance();
    	try{
    		for(int i=0;i<=100;i++) {
	        	c.setTime(format.parse(yf));
	        	c.add(Calendar.MONTH, -i);
	        	String format2 = format.format(c.getTime());
	        	if(format2.equals(lastYf)) {
	        		return i+1;
	        	}
    		}
    	}catch(Exception e){
    		logger.error(e.getMessage());
    	}
    	return 0;
    }
    
    
    //获取2个月份直接间隔的月份(包含首尾)
    public static List getYfs2(String lastYf,String yf) {
    	List list=new ArrayList();
    	SimpleDateFormat format = new SimpleDateFormat("yyyyMM");
    	Calendar c = Calendar.getInstance();
    	try{
    		for(int i=0;i<=100;i++) {
	        	c.setTime(format.parse(yf));
	        	c.add(Calendar.MONTH, -i);
	        	String format2 = format.format(c.getTime());
	        	list.add(format2);
	        	if(format2.equals(lastYf)) {
	        		Collections.sort(list);
	        		return list;
	        	}
    		}
    	}catch(Exception e){
    		logger.error(e.getMessage());
    	}
    	return null;
    }


    //获取传入的2个时间中间所有月份
    public static List getMonthBetween(String minDate, String maxDate) throws ParseException {
        ArrayList result = new ArrayList();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM");//格式化为年月
        Calendar min = Calendar.getInstance();
        Calendar max = Calendar.getInstance();
        min.setTime(sdf.parse(minDate));
        min.set(min.get(Calendar.YEAR), min.get(Calendar.MONTH), 1);
        max.setTime(sdf.parse(maxDate));
        max.set(max.get(Calendar.YEAR), max.get(Calendar.MONTH), 2);
        Calendar curr = min;
        while (curr.before(max)) {
            result.add(sdf.format(curr.getTime()));
            curr.add(Calendar.MONTH, 1);
        }
        Collections.sort(result);
        return result;
    }

    /**
     * 得到某个日期所在的年度是第几周
     * @return
     */
    public static String getDateSeqWeek(String date) {
        Calendar c = Calendar.getInstance(Locale.CHINA);
        c.setTime(StringToShortDate(date));
        String week = Integer.toString(c.get(Calendar.WEEK_OF_YEAR));
        return week;
    }

    /**
     * 获取最近几周的开始日期及结束日期
     * @param weeksum 几周
     * @return
     */
    public static String[] getSevenWeeks(int weeksum) {
        String [] weeks = new String[weeksum];
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        LocalDate localDate = null;
        for (int i=weeksum-1 ; i>=0; i--) {
            localDate = LocalDate.now();
            localDate = localDate.minusWeeks(i);
            LocalDate startDayOfWeek = localDate.with(DayOfWeek.MONDAY);//开始日期
            LocalDate endDayOfWeek = localDate.with(DayOfWeek.SUNDAY);  //结束日期
            String weekStartDay = startDayOfWeek.format(formatter);
            String weekEndDay = endDayOfWeek.format(formatter);
            weeks[weeksum-i-1] = weekStartDay+","+weekEndDay;
        }
        return weeks;
    }

    /**
     * 获取当前系统时间最近几个月的年月（含当月）
     * @param monthsum 最近几个月
     * @return
     */
    public static String[] getLatestMonth(int monthsum){
        Calendar  from  =  Calendar.getInstance();
        String[] months = new String[monthsum];
        for (int i=0; i0){
                from.add(Calendar.MONTH, -1);
            }
            String str =from.get(Calendar.YEAR)+"-"+fillZero(from.get(Calendar.MONTH)+1);
            months[monthsum-1-i] = str;
        }

        return months;
    }
    
    /**
     * 格式化月份
     */
    public static String fillZero(int i){
        String month = "";
        if(i<10){
            month = "0" + i;
        }else{
            month = String.valueOf(i);
        }
        return month;
    }

    // 根据year年的第week周，查询本周的起止时间
    public static String weekToDayFormate(int year, int week){
        Calendar calendar = Calendar.getInstance();
        // ①.设置该年份的开始日期：第一个月的第一天
        calendar.set(year,0,1);
        // ②.计算出第一周还剩几天：+1是因为1号是1天
        int dayOfWeek = 7 - calendar.get(Calendar.DAY_OF_WEEK) + 1;
        // ③.周数减去第一周再减去要得到的周
        week = week - 2;
        // ④.计算起止日期 ,+1是以周一为每周的第一天
        calendar.add(Calendar.DAY_OF_YEAR,week * 7 + dayOfWeek + 1);
        String sdate = new SimpleDateFormat("yyyy-MM-dd").format(calendar.getTime());
        calendar.add(Calendar.DAY_OF_YEAR, 6);
        String edate = new SimpleDateFormat("yyyy-MM-dd").format(calendar.getTime());
        return sdate+","+edate;
    }

    /**
     * 遍历起止日期之间的所有日期
     * @param startdate 
     * @param enddate
     * @return
     */
    public static List getStartEndDate(String startdate,String enddate){
        List dateList = new ArrayList<>();
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        try{
            Date d1 = simpleDateFormat.parse(startdate);
            Date d2 = simpleDateFormat.parse(enddate);
            
            Date tmp = d1;
            Calendar dd = Calendar.getInstance();
            dd.setTime(d1);
            //打印d1-d2之间所有日期
            while (tmp.getTime() < d2.getTime()){
                tmp = dd.getTime();
                dateList.add(simpleDateFormat.format(tmp));
                dd.add(Calendar.DAY_OF_MONTH,1);
            }
        }catch (ParseException e){
            e.printStackTrace();
        }
        return dateList;
    }

    /**
     * 获取起始日期和结束日期之间的日期列表
     * @param startDate
     * @param endDate
     * @return   Quanrun
     */
    public static List getDaysBetweenDates(Date startDate, Date endDate) {
        List dates = new ArrayList();
        Calendar calendar = new GregorianCalendar();
        calendar.setTime(startDate);
        while (calendar.getTime().before(endDate)) {
            Date result = calendar.getTime();
            dates.add(result);
            calendar.add(Calendar.DATE, 1);
        }
        return dates;
    }

    /**
     * 获取最近24小时时间列表
     * @return
     */
    public static List getHourList(){
        List hours = new ArrayList<>();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:00:00");//时间格式化
        Calendar calendar=Calendar.getInstance();
        Date date=new Date();
        calendar.setTime(date);
        for(int i=0;i<24;i++){//当前时间循环24小时减下去
            calendar.set(Calendar.HOUR_OF_DAY,calendar.get(Calendar.HOUR_OF_DAY) - 1);
            String time = sdf.format(calendar.getTime());
            hours.add(time.substring(0,13));
        }
        return hours;
    }
    
    /**测试方法 */
    public static void main(String[] args) {
        System.out.println(getHourList().toString());
    }
    
}