java中对Date日期一些处理

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package com.hx.cyb.common.util;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;/** *  * @description:日期工具类    * @fileName:DateUtil.java  * @createTime:2015年3月18日 下午2:15:53   * @version 1.0.0   * */public class DateUtil {private static Calendar cal = Calendar.getInstance();/** * 获取两个时间相差的小时数  * @param start * @param end * @return */public static double getDiffHour(Date start ,Date end) {double diff = (end.getTime() - start.getTime())/1000/60/60;return diff;}public static SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");public static SimpleDateFormat sdf2 = new SimpleDateFormat("yyyyMMdd");public static SimpleDateFormat sdf3 = new SimpleDateFormat("yyMMdd");public static SimpleDateFormat sdf4 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");public static SimpleDateFormat sdf5 = new SimpleDateFormat("yyyyMMddHHmmss");    public static SimpleDateFormat sdf6 = new SimpleDateFormat("yyyy年MM月dd日 HH:mm:ss");    public static SimpleDateFormat sdf7 = new SimpleDateFormat("yyyy年MM月dd日 HH:mm");    public static SimpleDateFormat sdf8 = new SimpleDateFormat("yyyy年MM月dd日");    public static SimpleDateFormat sdf9 = new SimpleDateFormat("MM.dd");    public static SimpleDateFormat sdf10 = new SimpleDateFormat("yyMMddHHmmss");    public static Date toDataYYYYMMDD(String str) {try {return sdf.parse(str);} catch (ParseException e) {e.printStackTrace();}return null;}public static Date toDataYYYYMMDDHHmmss(String str) {try {return sdf4.parse(str);} catch (ParseException e) {e.printStackTrace();}return null;}public static String formatDataYYYYMMDD(Date date) {return sdf2.format(date);}public static String formatDataYYMMDD(Date date) {return sdf3.format(date);}public static String formatDataYYMMDDHHMMSS(Date date) {return sdf5.format(date);}public static String formatDatayyMMDDHHMMSS(Date date) {return sdf10.format(date);}public static String formatDataYYYYMMDDLine(Date date) {return sdf.format(date);}public static String formatDataToDatetime(Date date){return sdf4.format(date);}/** * 获取当前日期month个月后的日期  * @param date * @param month * @return */public static Date getAddMonthDate(Date date ,int month) {Calendar calendar = Calendar.getInstance();        calendar.setTime(date);        calendar.add(Calendar.MONTH, month);        return calendar.getTime();} /** * 格式化日期x年x月x日 xx:xx * @param date * @return */public static String getZHDate(Date date) {        String zhDate = sdf6.format(date);        return zhDate;}public static String getZHShortDate(Date date){String zhShortDate = sdf8.format(date);return zhShortDate;}/**     * 按天借款的方式 返款时间的计算     * @param releaseTime 放款时间     * @param termCount 借款天数     * @return 还款日期     */    public static Date getDayRepayDate(Date releaseTime,int termCount) {    Calendar calendar = Calendar.getInstance();        calendar.setTime(releaseTime);        calendar.add(Calendar.DATE, termCount);        return calendar.getTime();    }/** * 获取某天之前或者之后自然日 返回格式   ：yyyy-MM-dd * @param releaseTime * @param termCount   负数则为之前    正数则为之后 * @return */public static String getNatureDay(Date releaseTime,int termCount){Date date = getDayRepayDate(releaseTime,termCount);return sdf.format(date);}/** *  获取某天之前或者之后自然日 返回格式   ：yyyy-MM-dd HH:mm:ss * @param releaseTime * @param termCount 负数则为之前    正数则为之后 * @return String * @Description:   * @date 2015年3月11日 下午12:47:18  * @version V1.0 */public static Date getNatureDay(String releaseTime,int termCount){        Calendar calendar = Calendar.getInstance() ;          try {              calendar.setTime(sdf4.parse(releaseTime)) ;          } catch (java.text.ParseException e) {              e.printStackTrace();          }          calendar.add(calendar.DATE,termCount) ;          return calendar.getTime() ;  } /** * 获取某天之前或者之后的几个月自然日 返回格式   ：yyyy-MM-dd * @param date * @param month   负数则为之前    正数则为之后 * @return */public static String getNatureMonth(Date date ,int month){Date dateCal = getAddMonthDate(date,month);return sdf.format(dateCal);}/** * 判断两个其实是否为同一天 * @param date * @param date2 * @return */public static boolean isSameDay(Date date, Date date2){if(date == null || date2 == null) return false;return differDays(date, date2) == 0?true:false;}/** *  判断参数日期是否为当天 * @param date * @param todayDate * @return */public static boolean isToday(Date date){if(date == null) return false;return differDays(date, new Date()) == 0? true: false;}/** * 判断给定日期与当天相差的天数     给定的日期为以后的日期则为负数 * @param date * @param todayDate * @return */public static int differDays(Date date, Date baseDate){if(date == null) return -1;cal.setTime(date);Calendar today = Calendar.getInstance();today.setTime(baseDate);int differYearDay = today.get(Calendar.DAY_OF_YEAR) - cal.get(Calendar.DAY_OF_YEAR);if(today.get(Calendar.YEAR) > cal.get(Calendar.YEAR)){int templYear = cal.get(Calendar.YEAR);differYearDay = 0;while(templYear != today.get(Calendar.YEAR)){cal.set(Calendar.YEAR, templYear ++);differYearDay += cal.getActualMaximum(Calendar.DAY_OF_YEAR);}differYearDay = differYearDay + today.get(Calendar.DAY_OF_YEAR) - cal.get(Calendar.DAY_OF_YEAR);}else if(today.get(Calendar.YEAR) < cal.get(Calendar.YEAR)){int templYear = cal.get(Calendar.YEAR);differYearDay = cal.get(Calendar.DAY_OF_YEAR);templYear --;while(templYear != today.get(Calendar.YEAR)){cal.set(Calendar.YEAR, templYear --);differYearDay += cal.getActualMaximum(Calendar.DAY_OF_YEAR);}differYearDay += today.getActualMaximum(Calendar.DAY_OF_YEAR) - today.get(Calendar.DAY_OF_YEAR);differYearDay = -differYearDay;}return differYearDay;}/** * 获取给定日期与当前日期相差天数 * @function:   * @param date * @return int    * @exception  * @author:HX1401122    * @since  1.0.0 */public static int differDays(Date date){Date baseDate = new Date();return differDays(baseDate,date);}/** *  * @function:计算两个日期相差天数   * @param startDate 开始时间 * @param endDate 结束时间 * @return int    * @exception  * @since  1.0.0 */public static int differDaysWithoutRigor(Date startDate, Date endDate){try{return daysBetween(startDate,endDate);}catch (ParseException e){e.printStackTrace();  }return 0;}public static Date nextYear(int hav, Date date){return next(Calendar.YEAR, hav, date);}public static Date nextMonth(int hav, Date date){return next(Calendar.MONTH, hav, date);}public static Date nextDay(int hav, Date date){return next(Calendar.DAY_OF_MONTH, hav, date);}public static Date next(int dateType, int hav, Date date){cal.setTime(date);cal.add(dateType, hav);return cal.getTime();}public static Date nextDayUpdateTime(int hav, Date date){Calendar calOrg = Calendar.getInstance();calOrg.setTime(date);Calendar newCal = Calendar.getInstance();newCal.set(Calendar.YEAR, calOrg.get(Calendar.YEAR));newCal.set(Calendar.MONTH, calOrg.get(Calendar.MONTH));newCal.set(Calendar.DAY_OF_MONTH, calOrg.get(Calendar.DAY_OF_MONTH));newCal.add(Calendar.DAY_OF_MONTH, hav);return newCal.getTime();}public static String nextDayByHour(int hav, Date date){    SimpleDateFormat dft=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        Calendar   dar=Calendar.getInstance();         dar.setTime(date);         dar.add(java.util.Calendar.HOUR_OF_DAY, hav);             return dft.format(dar.getTime());}/** * 比较给的时间与现在的时间前后顺序   true:之后的时间、 false:之前的时间 * @param hour * @param minute * @return */public static boolean afterTime(int hour, int minute){int nowHour = cal.get(Calendar.HOUR_OF_DAY);int nowMinute = cal.get(Calendar.MINUTE) + 5;if(nowHour < hour) return true;if(nowHour > hour) return false;if(nowHour == hour && nowMinute <= minute) return false;return true;}/** *  * description: 将日期转字符串 *  * @param date 日期 * @param format 日期格式 * @return String 字符串 * @since 1.0.0 */public static String dateToString(Date date, String format){SimpleDateFormat df = new SimpleDateFormat(format);return df.format(date);}/** *  * @function:字符串转日期   * @param str 字符串 * @param formatt 日期格式，如：yyyy-MM-dd * @return Date    * @exception  * @since  1.0.0 */public static Date StringToDate(String str,String formatt){Date date = null;try {  if(!StringUtils.isEmpty(str))  {        SimpleDateFormat format = new SimpleDateFormat(formatt);               date = format.parse(str);   }   } catch (ParseException e) {    e.printStackTrace();   }   return date;}/**       * 计算两个日期之间相差的天数       * @param smdate 较小的时间      * @param bdate  较大的时间      * @return 相差天数      * @throws ParseException       */        public static int daysBetween(Date smdate,Date bdate) throws ParseException        {            SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");          smdate=sdf.parse(sdf.format(smdate));          bdate=sdf.parse(sdf.format(bdate));          Calendar cal = Calendar.getInstance();            cal.setTime(smdate);            long time1 = cal.getTimeInMillis();                         cal.setTime(bdate);            long time2 = cal.getTimeInMillis();                 long between_days=(time2-time1)/(1000*3600*24);                     return Integer.parseInt(String.valueOf(between_days));               }              /**     *      * @function:字符串的日期格式的计算       * @param smdate     * @param bdate     * @return int     * @throws ParseException         * @exception      * @since  1.0.0     */    public static int daysBetween(String smdate,String bdate) throws ParseException{          SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");          Calendar cal = Calendar.getInstance();            cal.setTime(sdf.parse(smdate));            long time1 = cal.getTimeInMillis();                         cal.setTime(sdf.parse(bdate));            long time2 = cal.getTimeInMillis();                 long between_days=(time2-time1)/(1000*3600*24);                     return Integer.parseInt(String.valueOf(between_days));         }          /**     * @function: unix时间戳转换为日期       * @param timeStamp     * @return     * @throws ParseException Date        * @exception      * @author:duyubo        * @since  1.0.0     */    public static Date timeStampToDate(Long unixTimeStamp) throws ParseException{    if(unixTimeStamp != null){    SimpleDateFormat format = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" );    return format.parse(format.format(unixTimeStamp*1000));    }    return null;    }        /**     * @function:秒数转为时间格式       * @param time     * @return String        * @exception      * @author:duyubo        * @since  1.0.0     */    public static String secToTime(int time) {        String timeStr = null;        int hour = 0;        int minute = 0;        int second = 0;        if (time > 0){        minute = time / 60;        if (minute < 1){        timeStr = time +"秒";        } else if (minute < 60) {        second = time % 60;        timeStr = minute + "分" + unitFormat(second) +"秒";        } else {        hour = minute / 60;        if (hour > 99)        return "99小时59分59秒";        minute = minute % 60;        second = time - hour * 3600 - minute * 60;        timeStr = hour + "小时" + unitFormat(minute) + "分" + unitFormat(second) +"秒";        }        }        return timeStr;    }    public static String unitFormat(int i) {        String retStr = null;        if (i >= 0 && i < 10)            retStr = "0" + Integer.toString(i);        else            retStr = "" + i;        return retStr;    }    /**     * 计算两个时间的秒差     * @param start     * @param end     * @return int     * @Description:       * @date 2015年3月14日 下午10:42:06      * @version V1.0     */    public static int differSecond(Date start ,Date end){    return (int)((end.getTime()-start.getTime())/1000);    }}
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