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  • DateUtils

    /**
     * 日期工具类
     */
    public class DateUtil{
        
        // ==格式到年== 
        /**
         * 日期格式,年份,例如:2004,2008
         */
        public static final String DATE_FORMAT_YYYY = "yyyy";
        
        
        // ==格式到年月 == 
        /**
         * 日期格式,年份和月份,例如:200707,200808
         */
        public static final String DATE_FORMAT_YYYYMM = "yyyyMM";
     
        /**
         * 日期格式,年份和月份,例如:200707,2008-08
         */
        public static final String DATE_FORMAT_YYYY_MM = "yyyy-MM";
     
        
        // ==格式到年月日== 
        /**
         * 日期格式,年月日,例如:050630,080808
         */
        public static final String DATE_FORMAT_YYMMDD = "yyMMdd";
     
        /**
         * 日期格式,年月日,用横杠分开,例如:06-12-25,08-08-08
         */
        public static final String DATE_FORMAT_YY_MM_DD = "yy-MM-dd";
     
        /**
         * 日期格式,年月日,例如:20050630,20080808
         */
        public static final String DATE_FORMAT_YYYYMMDD = "yyyyMMdd";
        
        /**
         * 日期格式,年月日,用横杠分开,例如:2006-12-25,2008-08-08
         */
        public static final String DATE_FORMAT_YYYY_MM_DD = "yyyy-MM-dd";
        
        /**
         * 日期格式,年月日,例如:2016.10.05
         */
        public static final String DATE_FORMAT_POINTYYYYMMDD = "yyyy.MM.dd";
        
        /**
         * 日期格式,年月日,例如:2016年10月05日
         */
        public static final String DATE_TIME_FORMAT_YYYY年MM月DD日 = "yyyy年MM月dd日";
        
        
        // ==格式到年月日 时分 == 
        
        /**
         * 日期格式,年月日时分,例如:200506301210,200808081210
         */
        public static final String DATE_FORMAT_YYYYMMDDHHmm = "yyyyMMddHHmm";
     
        /**
         * 日期格式,年月日时分,例如:20001230 12:00,20080808 20:08
         */
        public static final String DATE_TIME_FORMAT_YYYYMMDD_HH_MI = "yyyyMMdd HH:mm";
        
        /**
         * 日期格式,年月日时分,例如:2000-12-30 12:00,2008-08-08 20:08
         */
        public static final String DATE_TIME_FORMAT_YYYY_MM_DD_HH_MI = "yyyy-MM-dd HH:mm";
        
        
        // ==格式到年月日 时分秒== 
        /**
         * 日期格式,年月日时分秒,例如:20001230120000,20080808200808
         */
        public static final String DATE_TIME_FORMAT_YYYYMMDDHHMISS = "yyyyMMddHHmmss";
        
        /**
         * 日期格式,年月日时分秒,年月日用横杠分开,时分秒用冒号分开
         * 例如:2005-05-10 23:20:00,2008-08-08 20:08:08
         */
        public static final String DATE_TIME_FORMAT_YYYY_MM_DD_HH_MI_SS = "yyyy-MM-dd HH:mm:ss";
     
        
        // ==格式到年月日 时分秒 毫秒== 
        /**
         * 日期格式,年月日时分秒毫秒,例如:20001230120000123,20080808200808456
         */
        public static final String DATE_TIME_FORMAT_YYYYMMDDHHMISSSSS = "yyyyMMddHHmmssSSS";
        
        
        // ==特殊格式==
        /**
         * 日期格式,月日时分,例如:10-05 12:00
         */
        public static final String DATE_FORMAT_MMDDHHMI = "MM-dd HH:mm";
     
        
        /* ************工具方法***************   */
        
        /** 
         * 获取某日期的年份
         * @param date 
         * @return 
         */
        public static Integer getYear(Date date) {
                Calendar cal = Calendar.getInstance();
                cal.setTime(date);
            return cal.get(Calendar.YEAR);
        }  
        
        /**
         * 获取某日期的月份
         * @param date
         * @return
         */
        public static Integer getMonth(Date date) {
            Calendar cal = Calendar.getInstance();
                cal.setTime(date);
            return cal.get(Calendar.MONTH) + 1;
        }
        
        /**
         * 获取某日期的日数
         * @param date
         * @return
         */
        public static Integer getDay(Date date){
            Calendar cal = Calendar.getInstance();
            cal.setTime(date);
             int day=cal.get(Calendar.DATE);//获取日
             return day;
        }
        
        /**
         * 格式化Date时间
         * @param time Date类型时间
         * @param timeFromat String类型格式
         * @return 格式化后的字符串
         */
        public static String parseDateToStr(Date time, String timeFromat){
            DateFormat dateFormat=new SimpleDateFormat(timeFromat);
            return dateFormat.format(time);
        }
        
        /**
         * 格式化Timestamp时间
         * @param timestamp Timestamp类型时间
         * @param timeFromat
         * @return 格式化后的字符串
         */
        public static String parseTimestampToStr(Timestamp timestamp,String timeFromat){
            SimpleDateFormat df = new SimpleDateFormat(timeFromat);
            return df.format(timestamp);
        }
        
        /**
         * 格式化Date时间
         * @param time Date类型时间
         * @param timeFromat String类型格式
         * @param defaultValue 默认值为当前时间Date
         * @return 格式化后的字符串
         */
        public static String parseDateToStr(Date time, String timeFromat, final Date defaultValue){
            try{
                DateFormat dateFormat=new SimpleDateFormat(timeFromat);
                return dateFormat.format(time);
            }catch (Exception e){
                if(defaultValue!=null)
                    return parseDateToStr(defaultValue, timeFromat);
                else
                    return parseDateToStr(new Date(), timeFromat);
            }
        }
        
        /**
         * 格式化Date时间
         * @param time Date类型时间
         * @param timeFromat String类型格式
         * @param defaultValue 默认时间值String类型
         * @return 格式化后的字符串
         */
        public static String parseDateToStr(Date time, String timeFromat, final String defaultValue){
            try{
                DateFormat dateFormat=new SimpleDateFormat(timeFromat);
                return dateFormat.format(time);
            }catch (Exception e){
                return defaultValue;
            }
        }
        
        /**
         * 格式化String时间
         * @param time String类型时间
         * @param timeFromat String类型格式
         * @return 格式化后的Date日期
         */
        public static Date parseStrToDate(String time, String timeFromat) {
            if (time == null || time.equals("")) {
                return null;
            }
            
            Date date=null;
            try{
                DateFormat dateFormat=new SimpleDateFormat(timeFromat);
                date=dateFormat.parse(time);
            }catch(Exception e){
                
            }
            return date;
        }
        
        /**
         * 格式化String时间
         * @param strTime String类型时间
         * @param timeFromat String类型格式
         * @param defaultValue 异常时返回的默认值
         * @return
         */
        public static Date parseStrToDate(String strTime, String timeFromat,
                Date defaultValue) {
            try {
                DateFormat dateFormat = new SimpleDateFormat(timeFromat);
                return dateFormat.parse(strTime);
            } catch (Exception e) {
                return defaultValue;
            }
        }
        
        /**
         * 当strTime为2008-9时返回为2008-9-1 00:00格式日期时间,无法转换返回null.
         * @param strTime
         * @return
         */
        public static Date strToDate(String strTime) {
            if(strTime==null || strTime.trim().length()<=0)
                return null;
            
            Date date = null;
            List<String> list = new ArrayList<String>(0);
            
            list.add(DATE_TIME_FORMAT_YYYY_MM_DD_HH_MI_SS);
            list.add(DATE_TIME_FORMAT_YYYYMMDDHHMISSSSS);
            list.add(DATE_TIME_FORMAT_YYYY_MM_DD_HH_MI);
            list.add(DATE_TIME_FORMAT_YYYYMMDD_HH_MI);
            list.add(DATE_TIME_FORMAT_YYYYMMDDHHMISS);
            list.add(DATE_FORMAT_YYYY_MM_DD);
            //list.add(DATE_FORMAT_YY_MM_DD);
            list.add(DATE_FORMAT_YYYYMMDD);
            list.add(DATE_FORMAT_YYYY_MM);
            list.add(DATE_FORMAT_YYYYMM);
            list.add(DATE_FORMAT_YYYY);
            
            
            for (Iterator iter = list.iterator(); iter.hasNext();) {
                String format = (String) iter.next();
                if(strTime.indexOf("-")>0 && format.indexOf("-")<0)
                    continue;
                if(strTime.indexOf("-")<0 && format.indexOf("-")>0)
                    continue;
                if(strTime.length()>format.length())
                    continue;
                date = parseStrToDate(strTime, format);
                if (date != null)
                    break;
            }
     
            return date;
        }
        
        /**
         * 解析两个日期之间的所有月份
         * @param beginDateStr 开始日期,至少精确到yyyy-MM
         * @param endDateStr 结束日期,至少精确到yyyy-MM
         * @return yyyy-MM日期集合
         */  
        public static List<String> getMonthListOfDate(String beginDateStr, String endDateStr) {  
            // 指定要解析的时间格式  
            SimpleDateFormat f = new SimpleDateFormat("yyyy-MM");  
            // 返回的月份列表  
            String sRet = "";  
      
            // 定义一些变量  
            Date beginDate = null;  
            Date endDate = null;  
      
            GregorianCalendar beginGC = null;  
            GregorianCalendar endGC = null;  
            List<String> list = new ArrayList<String>();  
      
            try {  
                // 将字符串parse成日期  
                beginDate = f.parse(beginDateStr);  
                endDate = f.parse(endDateStr);  
      
                // 设置日历  
                beginGC = new GregorianCalendar();  
                beginGC.setTime(beginDate);  
      
                endGC = new GregorianCalendar();  
                endGC.setTime(endDate);  
      
                // 直到两个时间相同  
                while (beginGC.getTime().compareTo(endGC.getTime()) <= 0) {  
                    sRet = beginGC.get(Calendar.YEAR) + "-"  
                            + (beginGC.get(Calendar.MONTH) + 1);  
                    list.add(sRet);  
                    // 以月为单位,增加时间  
                    beginGC.add(Calendar.MONTH, 1);  
                }  
                return list;  
            } catch (Exception e) {  
                e.printStackTrace();  
                return null;  
            }  
        }  
      
        /** 
         * 解析两个日期段之间的所有日期
         * @param beginDateStr 开始日期  ,至少精确到yyyy-MM-dd
         * @param endDateStr 结束日期  ,至少精确到yyyy-MM-dd
         * @return yyyy-MM-dd日期集合
         */  
        public static List<String> getDayListOfDate(String beginDateStr, String endDateStr) {  
            // 指定要解析的时间格式  
            SimpleDateFormat f = new SimpleDateFormat("yyyy-MM-dd");  
      
            // 定义一些变量  
            Date beginDate = null;  
            Date endDate = null;  
      
            Calendar beginGC = null;  
            Calendar endGC = null;  
            List<String> list = new ArrayList<String>();  
      
            try {  
                // 将字符串parse成日期  
                beginDate = f.parse(beginDateStr);  
                endDate = f.parse(endDateStr);  
      
                // 设置日历  
                beginGC = Calendar.getInstance();  
                beginGC.setTime(beginDate);  
      
                endGC = Calendar.getInstance();  
                endGC.setTime(endDate);  
                SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");  
      
                // 直到两个时间相同  
                while (beginGC.getTime().compareTo(endGC.getTime()) <= 0) {  
      
                    list.add(sdf.format(beginGC.getTime()));  
                    // 以日为单位,增加时间  
                    beginGC.add(Calendar.DAY_OF_MONTH, 1);  
                }  
                return list;  
            } catch (Exception e) {  
                e.printStackTrace();  
                return null;  
            }  
        }  
      
        /**
         * 获取当下年份指定前后数量的年份集合
         * @param before 当下年份前年数
         * @param behind 当下年份后年数
         * @return 集合
         */
        public static List<Integer> getYearListOfYears(int before,int behind) {
            if (before<0 || behind<0) {
                return null;
            }
            List<Integer> list = new ArrayList<Integer>();  
            Calendar c = null;  
            c = Calendar.getInstance();  
            c.setTime(new Date());  
            int currYear = Calendar.getInstance().get(Calendar.YEAR);  
      
            int startYear = currYear - before;  
            int endYear = currYear + behind;  
            for (int i = startYear; i < endYear; i++) {  
                list.add(Integer.valueOf(i));  
            }  
            return list;  
        }
        
        /** 
         * 获取当前日期是一年中第几周 
         * @param date 
         * @return 
         */  
        public static Integer getWeekthOfYear(Date date) {  
            Calendar c = new GregorianCalendar();  
            c.setFirstDayOfWeek(Calendar.MONDAY);  
            c.setMinimalDaysInFirstWeek(7);  
            c.setTime(date);  
      
            return c.get(Calendar.WEEK_OF_YEAR);  
        } 
     
        /**
         * 获取某一年各星期的始终时间
         * 实例:getWeekList(2016),第52周(从2016-12-26至2017-01-01)
         * @param 年份
         * @return
         */  
        public static HashMap<Integer,String> getWeekTimeOfYear(int year) {  
            HashMap<Integer,String> map = new LinkedHashMap<Integer,String>();  
            Calendar c = new GregorianCalendar();  
            c.set(year, Calendar.DECEMBER, 31, 23, 59, 59);  
            int count = getWeekthOfYear(c.getTime());  
      
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");  
            String dayOfWeekStart = "";  
            String dayOfWeekEnd = "";  
            for (int i = 1; i <= count; i++) {  
                dayOfWeekStart = sdf.format(getFirstDayOfWeek(year, i));  
                dayOfWeekEnd = sdf.format(getLastDayOfWeek(year, i));  
                map.put(Integer.valueOf(i), "第"+i+"周(从"+dayOfWeekStart + "至" + dayOfWeekEnd+")");  
            }  
            return map;  
      
        }  
          
        /** 
         * 获取某一年的总周数 
         * @param year 
         * @return 
         */  
        public static Integer getWeekCountOfYear(int year){  
            Calendar c = new GregorianCalendar();  
            c.set(year, Calendar.DECEMBER, 31, 23, 59, 59);  
            int count = getWeekthOfYear(c.getTime());  
            return count;  
        }  
        
        /** 
         * 获取指定日期所在周的第一天 
         * @param date 
         * @return 
         */  
        public static Date getFirstDayOfWeek(Date date) {  
            Calendar c = new GregorianCalendar();  
            c.setFirstDayOfWeek(Calendar.MONDAY);  
            c.setTime(date);  
            c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek()); // Monday  
            return c.getTime();  
        }  
      
        /** 
         * 获取指定日期所在周的最后一天 
         * @param date 
         * @return 
         */  
        public static Date getLastDayOfWeek(Date date) {
            Calendar c = new GregorianCalendar();
            c.setFirstDayOfWeek(Calendar.MONDAY);
            c.setTime(date);
            c.set(Calendar.DAY_OF_WEEK, c.getFirstDayOfWeek() + 6); // Sunday
            return c.getTime();
        }
      
        /** 
         * 获取某年某周的第一天 
         * @param year 目标年份
         * @param week 目标周数
         * @return 
         */  
        public static Date getFirstDayOfWeek(int year, int week) {  
            Calendar c = new GregorianCalendar();  
            c.set(Calendar.YEAR, year);  
            c.set(Calendar.MONTH, Calendar.JANUARY);  
            c.set(Calendar.DATE, 1);  
      
            Calendar cal = (GregorianCalendar) c.clone();
            cal.add(Calendar.DATE, week * 7);  
      
            return getFirstDayOfWeek(cal.getTime());  
        }  
      
        /** 
         * 获取某年某周的最后一天 
         * @param year 目标年份
         * @param week 目标周数
         * @return 
         */  
        public static Date getLastDayOfWeek(int year, int week) {  
            Calendar c = new GregorianCalendar();  
            c.set(Calendar.YEAR, year);  
            c.set(Calendar.MONTH, Calendar.JANUARY);  
            c.set(Calendar.DATE, 1);  
      
            Calendar cal = (GregorianCalendar) c.clone();  
            cal.add(Calendar.DATE, week * 7);  
      
            return getLastDayOfWeek(cal.getTime());  
        }  
          
        /** 
         * 获取某年某月的第一天 
         * @param year 目标年份
         * @param month 目标月份
         * @return 
         */  
        public static Date getFirstDayOfMonth(int year,int month){  
            month = month-1;  
            Calendar   c   =   Calendar.getInstance();     
            c.set(Calendar.YEAR, year);  
            c.set(Calendar.MONTH, month);  
              
            int day = c.getActualMinimum(c.DAY_OF_MONTH);  
      
            c.set(Calendar.DAY_OF_MONTH, day);
            c.set(Calendar.HOUR_OF_DAY, 0);
            c.set(Calendar.MINUTE, 0);
            c.set(Calendar.SECOND, 0);
            c.set(Calendar.MILLISECOND, 0);
            return c.getTime();
        }  
          
        /** 
         * 获取某年某月的最后一天 
         * @param year 目标年份
         * @param month 目标月份
         * @return 
         */  
        public static Date getLastDayOfMonth(int year,int month){  
            month = month-1;  
            Calendar   c   =   Calendar.getInstance();     
            c.set(Calendar.YEAR, year);  
            c.set(Calendar.MONTH, month);  
            int day = c.getActualMaximum(c.DAY_OF_MONTH);  
            c.set(Calendar.DAY_OF_MONTH, day);
            c.set(Calendar.HOUR_OF_DAY, 23);
            c.set(Calendar.MINUTE, 59);
            c.set(Calendar.SECOND, 59);
            c.set(Calendar.MILLISECOND, 999);
            return c.getTime();  
        }  
      
        /** 
         * 获取某个日期为星期几 
         * @param date 
         * @return String "星期*"
         */  
        public static String getDayWeekOfDate1(Date date) {  
             String[] weekDays = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
             Calendar cal = Calendar.getInstance();
             cal.setTime(date);
     
             int w = cal.get(Calendar.DAY_OF_WEEK) - 1;
             if (w < 0)
                 w = 0;
             
             return weekDays[w];
        }  
        
        /**
         * 获得指定日期的星期几数
         * @param date
         * @return int 
         */ 
        public static Integer getDayWeekOfDate2(Date date){  
            Calendar aCalendar = Calendar.getInstance();  
            aCalendar.setTime(date);     
            int weekDay = aCalendar.get(Calendar.DAY_OF_WEEK);     
            return weekDay;
        }
        
        /**
         * 验证字符串是否为日期
         * 验证格式:YYYYMMDD、YYYY_MM_DD、YYYYMMDDHHMISS、YYYYMMDD_HH_MI、YYYY_MM_DD_HH_MI、YYYYMMDDHHMISSSSS、YYYY_MM_DD_HH_MI_SS
         * @param strTime
         * @return null时返回false;true为日期,false不为日期
         */
        public static boolean validateIsDate(String strTime) {
            if (strTime == null || strTime.trim().length() <= 0)
                return false;
            
            Date date = null;
            List<String> list = new ArrayList<String>(0);
            
            list.add(DATE_TIME_FORMAT_YYYY_MM_DD_HH_MI_SS);
            list.add(DATE_TIME_FORMAT_YYYYMMDDHHMISSSSS);
            list.add(DATE_TIME_FORMAT_YYYY_MM_DD_HH_MI);
            list.add(DATE_TIME_FORMAT_YYYYMMDD_HH_MI);
            list.add(DATE_TIME_FORMAT_YYYYMMDDHHMISS);
            list.add(DATE_FORMAT_YYYY_MM_DD);
            //list.add(DATE_FORMAT_YY_MM_DD);
            list.add(DATE_FORMAT_YYYYMMDD);
            //list.add(DATE_FORMAT_YYYY_MM);
            //list.add(DATE_FORMAT_YYYYMM);
            //list.add(DATE_FORMAT_YYYY);
            
            for (Iterator iter = list.iterator(); iter.hasNext();) {
                String format = (String) iter.next();
                if(strTime.indexOf("-")>0 && format.indexOf("-")<0)
                    continue;
                if(strTime.indexOf("-")<0 && format.indexOf("-")>0)
                    continue;
                if(strTime.length()>format.length())
                    continue;
                date = parseStrToDate(strTime.trim(), format);
                if (date != null)
                    break;
            }
            
            if (date != null) {
                System.out.println("生成的日期:"+DateUtil.parseDateToStr(date, DateUtil.DATE_TIME_FORMAT_YYYY_MM_DD_HH_MI_SS, "--null--"));
                return true;
            }
            return false;
        }
        
        /**
         * 将指定日期的时分秒格式为零
         * @param date
         * @return
         */
        public static Date formatHhMmSsOfDate(Date date) {
            Calendar cal = Calendar.getInstance();
            cal.setTime(date);
            cal.set(Calendar.HOUR_OF_DAY, 0);
            cal.set(Calendar.MINUTE, 0);
            cal.set(Calendar.SECOND, 0);
            cal.set(Calendar.MILLISECOND, 0);
            return cal.getTime();
        }
        
        /**
         * 获得指定时间加减参数后的日期(不计算则输入0) 
         * @param date 指定日期
         * @param year 年数,可正可负
         * @param month 月数,可正可负
         * @param day 天数,可正可负
         * @param hour 小时数,可正可负
         * @param minute 分钟数,可正可负
         * @param second 秒数,可正可负
         * @param millisecond 毫秒数,可正可负
         * @return 计算后的日期
         */
        public static Date addDate(Date date,int year,int month,int day,int hour,int minute,int second,int millisecond){
            Calendar c = Calendar.getInstance();
            c.setTime(date);
            c.add(Calendar.YEAR, year);//加减年数
            c.add(Calendar.MONTH, month);//加减月数
            c.add(Calendar.DATE, day);//加减天数
            c.add(Calendar.HOUR,hour);//加减小时数
            c.add(Calendar.MINUTE, minute);//加减分钟数
            c.add(Calendar.SECOND, second);//加减秒
            c.add(Calendar.MILLISECOND, millisecond);//加减毫秒数
            
            return c.getTime();
        }
        
        /**
         * 获得两个日期的时间戳之差
         * @param startDate
         * @param endDate
         * @return
         */
        public static Long getDistanceTimestamp(Date startDate,Date endDate){
            long daysBetween=(endDate.getTime()-startDate.getTime()+1000000)/(3600*24*1000);
            return daysBetween;
        }
        
        /**
         * 判断二个时间是否为同年同月
         * @param date1
         * @param date2
         * @return
         */
        public static Boolean compareIsSameMonth(Date date1,Date date2){
            boolean flag = false;
            int year1  = getYear(date1);
            int year2 = getYear(date2);
            if(year1 == year2){
                int month1 = getMonth(date1);
                int month2 = getMonth(date2);
                if(month1 == month2)flag = true;
            }
            return flag;
        }
        
         /** 
         * 获得两个时间相差距离多少天多少小时多少分多少秒 
         * @param str1 时间参数 1 格式:1990-01-01 12:00:00 
         * @param str2 时间参数 2 格式:2009-01-01 12:00:00 
         * @return long[] 返回值为:{天, 时, 分, 秒} 
         */ 
        public static long[] getDistanceTime(Date one, Date two) { 
            long day = 0; 
            long hour = 0; 
            long min = 0; 
            long sec = 0; 
            try { 
               
                long time1 = one.getTime(); 
                long time2 = two.getTime(); 
                long diff ; 
                if(time1<time2) { 
                    diff = time2 - time1; 
                } else { 
                    diff = time1 - time2; 
                } 
                day = diff / (24 * 60 * 60 * 1000); 
                hour = (diff / (60 * 60 * 1000) - day * 24); 
                min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60); 
                sec = (diff/1000-day*24*60*60-hour*60*60-min*60); 
            } catch (Exception e) { 
                e.printStackTrace(); 
            }
            long[] times = {day, hour, min, sec}; 
            return times; 
        } 
        
        /** 
         * 两个时间相差距离多少天多少小时多少分多少秒 
         * @param str1 时间参数 1 格式:1990-01-01 12:00:00 
         * @param str2 时间参数 2 格式:2009-01-01 12:00:00 
         * @return String 返回值为:{天, 时, 分, 秒}
         */ 
        public static long[] getDistanceTime(String str1, String str2) { 
            DateFormat df = new SimpleDateFormat(DATE_TIME_FORMAT_YYYY_MM_DD_HH_MI_SS); 
            Date one; 
            Date two; 
            long day = 0; 
            long hour = 0; 
            long min = 0; 
            long sec = 0; 
            try { 
                one = df.parse(str1); 
                two = df.parse(str2); 
                long time1 = one.getTime(); 
                long time2 = two.getTime(); 
                long diff ; 
                if(time1<time2) { 
                    diff = time2 - time1; 
                } else { 
                    diff = time1 - time2; 
                } 
                day = diff / (24 * 60 * 60 * 1000); 
                hour = (diff / (60 * 60 * 1000) - day * 24); 
                min = ((diff / (60 * 1000)) - day * 24 * 60 - hour * 60); 
                sec = (diff/1000-day*24*60*60-hour*60*60-min*60); 
            } catch (ParseException e) { 
                e.printStackTrace(); 
            } 
            long[] times = {day, hour, min, sec}; 
            return times; 
        } 
        
        /** 
         * 两个时间之间相差距离多少天 
         * @param one 时间参数 1: 
         * @param two 时间参数 2: 
         * @return 相差天数 
         */ 
        public static Long getDistanceDays(String str1, String str2) throws Exception{ 
            DateFormat df = new SimpleDateFormat(DATE_TIME_FORMAT_YYYY_MM_DD_HH_MI_SS); 
            Date one; 
            Date two; 
            long days=0; 
            try { 
                one = df.parse(str1); 
                two = df.parse(str2); 
                long time1 = one.getTime(); 
                long time2 = two.getTime(); 
                long diff ; 
                if(time1<time2) { 
                    diff = time2 - time1; 
                } else { 
                    diff = time1 - time2; 
                } 
                days = diff / (1000 * 60 * 60 * 24); 
            } catch (ParseException e) { 
                e.printStackTrace(); 
            } 
            return days; 
        } 
        
        /**
         * 获取指定时间的那天 00:00:00.000 的时间
         * @param date
         * @return
         */
        public static Date getDayBeginTime(final Date date) {
                Calendar c = Calendar.getInstance();
                c.setTime(date);
                c.set(Calendar.HOUR_OF_DAY, 0);
                c.set(Calendar.MINUTE, 0);
                c.set(Calendar.SECOND, 0);
                c.set(Calendar.MILLISECOND, 0);
                return c.getTime();
        }
        
        /**
         * 获取指定时间的那天 23:59:59.999 的时间
         * @param date
         * @return
         */
        public static Date getDayEndTime(final Date date) {
                Calendar c = Calendar.getInstance();
                c.setTime(date);
                c.set(Calendar.HOUR_OF_DAY, 23);
                c.set(Calendar.MINUTE, 59);
                c.set(Calendar.SECOND, 59);
                c.set(Calendar.MILLISECOND, 999);
                return c.getTime();
        }
       
        
        public static void main(String [] args){
            try {
                DateUtil dateUtil = new DateUtil();
                System.out.println();
                
            } catch (Exception e) {
                // TODO: handle exception
            }
            
        }
        
    }
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  • 原文地址:https://www.cnblogs.com/LingCoder/p/9406637.html
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