import java.sql.Timestamp;import java.text.ParsePosition; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; import java.util.GregorianCalendar; import java.util.regex.Pattern; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory;     public class DateUtils {     protected static Log logger = LogFactory.getLog(DateUtils.class);       // 格式：年－月－日 小时：分钟：秒     public static final String FORMAT_ONE = "yyyy-MM-dd HH:mm:ss";       // 格式：年－月－日 小时：分钟     public static final String FORMAT_TWO = "yyyy-MM-dd HH:mm";       // 格式：年月日 小时分钟秒     public static final String FORMAT_THREE = "yyyyMMdd-HHmmss";       // 格式：年－月－日     public static final String LONG_DATE_FORMAT = "yyyy-MM-dd";       // 格式：月－日     public static final String SHORT_DATE_FORMAT = "MM-dd";       // 格式：小时：分钟：秒     public static final String LONG_TIME_FORMAT = "HH:mm:ss";       //格式：年-月     public static final String MONTG_DATE_FORMAT = "yyyy-MM";       // 年的加减     public static final int SUB_YEAR = Calendar.YEAR;       // 月加减     public static final int SUB_MONTH = Calendar.MONTH;       // 天的加减     public static final int SUB_DAY = Calendar.DATE;       // 小时的加减     public static final int SUB_HOUR = Calendar.HOUR;       // 分钟的加减     public static final int SUB_MINUTE = Calendar.MINUTE;       // 秒的加减     public static final int SUB_SECOND = Calendar.SECOND;       static final String dayNames[] = { "星期日", "星期一", "星期二", "星期三", "星期四","星期五", "星期六" };       @SuppressWarnings("unused")     private static final SimpleDateFormat timeFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");       public DateUtils() {}       /**      * 把符合日期格式的字符串转换为日期类型      *       * @param dateStr      * @return      */     public static java.util.Date stringtoDate(String dateStr, String format) {         Date d = null;         SimpleDateFormat formater = new SimpleDateFormat(format);         try {             formater.setLenient(false);             d = formater.parse(dateStr);         } catch (Exception e) {             // log.error(e);             d = null;         }         return d;     }       /**      * 把符合日期格式的字符串转换为日期类型      */     public static java.util.Date stringtoDate(String dateStr, String format,             ParsePosition pos) {         Date d = null;         SimpleDateFormat formater = new SimpleDateFormat(format);         try {             formater.setLenient(false);             d = formater.parse(dateStr, pos);         } catch (Exception e) {             d = null;         }         return d;     }       /**      * 把日期转换为字符串      *       * @param date      * @return      */     public static String dateToString(java.util.Date date, String format) {         String result = "";         SimpleDateFormat formater = new SimpleDateFormat(format);         try {             result = formater.format(date);         } catch (Exception e) {             // log.error(e);         }         return result;     }       /**      * 获取当前时间的指定格式      *       * @param format      * @return      */     public static String getCurrDate(String format) {         return dateToString(new Date(), format);     }       /**      *       * @param dateStr      * @param amount      * @return      */     public static String dateSub(int dateKind, String dateStr, int amount) {         Date date = stringtoDate(dateStr, FORMAT_ONE);         Calendar calendar = Calendar.getInstance();         calendar.setTime(date);         calendar.add(dateKind, amount);         return dateToString(calendar.getTime(), FORMAT_ONE);     }       /**      * 两个日期相减      *       * @param firstTime      * @param secTime      * @return 相减得到的秒数      */     public static long timeSub(String firstTime, String secTime) {         long first = stringtoDate(firstTime, FORMAT_ONE).getTime();         long second = stringtoDate(secTime, FORMAT_ONE).getTime();         return (second - first) / 1000;     }       /**      * 获得某月的天数      *       * @param year      *          int      * @param month      *          int      * @return int      */     public static int getDaysOfMonth(String year, String month) {         int days = 0;         if (month.equals("1") || month.equals("3") || month.equals("5")                 || month.equals("7") || month.equals("8") || month.equals("10")                 || month.equals("12")) {             days = 31;         } else if (month.equals("4") || month.equals("6") || month.equals("9")                 || month.equals("11")) {             days = 30;         } else {             if ((Integer.parseInt(year) % 4 == 0 && Integer.parseInt(year) % 100 != 0)                     || Integer.parseInt(year) % 400 == 0) {                 days = 29;             } else {                 days = 28;             }         }           return days;     }       /**      * 获取某年某月的天数      *       * @param year      *          int      * @param month      *          int 月份[1-12]      * @return int      */     public static int getDaysOfMonth(int year, int month) {         Calendar calendar = Calendar.getInstance();         calendar.set(year, month - 1, 1);         return calendar.getActualMaximum(Calendar.DAY_OF_MONTH);     }       /**      * 获得当前日期      *       * @return int      */     public static int getToday() {         Calendar calendar = Calendar.getInstance();         return calendar.get(Calendar.DATE);     }       /**      * 获得当前月份      *       * @return int      */     public static int getToMonth() {         Calendar calendar = Calendar.getInstance();         return calendar.get(Calendar.MONTH) + 1;     }       /**      * 获得当前年份      *       * @return int      */     public static int getToYear() {         Calendar calendar = Calendar.getInstance();         return calendar.get(Calendar.YEAR);     }       /**      * 返回日期的天      *       * @param date      *          Date      * @return int      */     public static int getDay(Date date) {         Calendar calendar = Calendar.getInstance();         calendar.setTime(date);         return calendar.get(Calendar.DATE);     }       /**      * 返回日期的年      *       * @param date      *          Date      * @return int      */     public static int getYear(Date date) {         Calendar calendar = Calendar.getInstance();         calendar.setTime(date);         return calendar.get(Calendar.YEAR);     }       /**      * 返回日期的月份，1-12      *       * @param date      *          Date      * @return int      */     public static int getMonth(Date date) {         Calendar calendar = Calendar.getInstance();         calendar.setTime(date);         return calendar.get(Calendar.MONTH) + 1;     }       /**      * 计算两个日期相差的天数，如果date2 > date1 返回正数，否则返回负数      *       * @param date1      *          Date      * @param date2      *          Date      * @return long      */     public static long dayDiff(Date date1, Date date2) {         return (date2.getTime() - date1.getTime()) / 86400000;     }       /**      * 比较两个日期的年差      *       * @param befor      * @param after      * @return      */     public static int yearDiff(String before, String after) {         Date beforeDay = stringtoDate(before, LONG_DATE_FORMAT);         Date afterDay = stringtoDate(after, LONG_DATE_FORMAT);         return getYear(afterDay) - getYear(beforeDay);     }       /**      * 比较指定日期与当前日期的差      *       * @param befor      * @param after      * @return      */     public static int yearDiffCurr(String after) {         Date beforeDay = new Date();         Date afterDay = stringtoDate(after, LONG_DATE_FORMAT);         return getYear(beforeDay) - getYear(afterDay);     }           /**      * 比较指定日期与当前日期的差      * @param before      * @return      */     public static long dayDiffCurr(String before) {         Date currDate = DateUtils.stringtoDate(currDay(), LONG_DATE_FORMAT);         Date beforeDate = stringtoDate(before, LONG_DATE_FORMAT);         return (currDate.getTime() - beforeDate.getTime()) / 86400000;       }       /**      * 获取每月的第一周      * @param year      * @param month      * @return      */     public static int getFirstWeekdayOfMonth(int year, int month) {         Calendar c = Calendar.getInstance();         c.setFirstDayOfWeek(Calendar.SATURDAY); // 星期天为第一天         c.set(year, month - 1, 1);         return c.get(Calendar.DAY_OF_WEEK);     }       /**      * 获取每月的最后一周      * @param year      * @param month      * @return      */     public static int getLastWeekdayOfMonth(int year, int month) {         Calendar c = Calendar.getInstance();         c.setFirstDayOfWeek(Calendar.SATURDAY); // 星期天为第一天         c.set(year, month - 1, getDaysOfMonth(year, month));         return c.get(Calendar.DAY_OF_WEEK);     }           /**      * 获得当前日期字符串，格式"yyyy-MM-dd HH:mm:ss"      *       * @return      */     public static String getNow() {         Calendar today = Calendar.getInstance();         return dateToString(today.getTime(), FORMAT_ONE);     }       /**      * 根据生日获取星座      *       * @param birth      *          YYYY-mm-dd      * @return      */     public static String getAstro(String birth) {         if (!isDate(birth)) {             birth = "2000" + birth;         }         if (!isDate(birth)) {             return "";         }         int month = Integer.parseInt(birth.substring(birth.indexOf("-") + 1,                 birth.lastIndexOf("-")));         int day = Integer.parseInt(birth.substring(birth.lastIndexOf("-") + 1));         String s = "魔羯水瓶双鱼牡羊金牛双子巨蟹狮子处女天秤天蝎射手魔羯";         int[] arr = { 20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22, 22 };         int start = month * 2 - (day < arr[month - 1] ? 2 : 0);         return s.substring(start, start + 2) + "座";     }       /**      * 判断日期是否有效,包括闰年的情况      *       * @param date      *          YYYY-mm-dd      * @return      */     public static boolean isDate(String date) {         StringBuffer reg = new StringBuffer("^((\\d{2}(([02468][048])|([13579][26]))-?((((0?");         reg.append("[13578])|(1[02]))-?((0?[1-9])|([1-2][0-9])|(3[01])))");         reg.append("|(((0?[469])|(11))-?((0?[1-9])|([1-2][0-9])|(30)))|");         reg.append("(0?2-?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][12");         reg.append("35679])|([13579][01345789]))-?((((0?[13578])|(1[02]))");         reg.append("-?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))");         reg.append("-?((0?[1-9])|([1-2][0-9])|(30)))|(0?2-?((0?[");         reg.append("1-9])|(1[0-9])|(2[0-8]))))))");         Pattern p = Pattern.compile(reg.toString());         return p.matcher(date).matches();     }       /**      * 取得指定日期过 months 月后的日期 (当 months 为负数表示指定月之前);      *       * @param date      *          日期 为null时表示当天      * @param month      *          相加(相减)的月数      */     public static Date nextMonth(Date date, int months) {         Calendar cal = Calendar.getInstance();         if (date != null) {             cal.setTime(date);         }         cal.add(Calendar.MONTH, months);         return cal.getTime();     }       /**      * 取得指定日期过 day 天后的日期 (当 day 为负数表示指日期之前);      *       * @param date      *          日期 为null时表示当天      * @param month      *          相加(相减)的月数      */     public static Date nextDay(Date date, int day) {         Calendar cal = Calendar.getInstance();         if (date != null) {             cal.setTime(date);         }         cal.add(Calendar.DAY_OF_YEAR, day);         return cal.getTime();     }       /**      * 取得距离今天 day 日的日期      * @param day      * @param format      * @return      * @author chenyz      */     public static String nextDay(int day, String format) {         Calendar cal = Calendar.getInstance();         cal.setTime(new Date());         cal.add(Calendar.DAY_OF_YEAR, day);         return dateToString(cal.getTime(), format);     }       /**      * 取得指定日期过 day 周后的日期 (当 day 为负数表示指定月之前)      *       * @param date      *          日期 为null时表示当天      */     public static Date nextWeek(Date date, int week) {         Calendar cal = Calendar.getInstance();         if (date != null) {             cal.setTime(date);         }         cal.add(Calendar.WEEK_OF_MONTH, week);         return cal.getTime();     }       /**      * 获取当前的日期(yyyy-MM-dd)      */     public static String currDay() {         return DateUtils.dateToString(new Date(), DateUtils.LONG_DATE_FORMAT);     }       /**      * 获取昨天的日期      *       * @return      */     public static String befoDay() {         return befoDay(DateUtils.LONG_DATE_FORMAT);     }       /**      * 根据时间类型获取昨天的日期      * @param format      * @return      * @author chenyz      */     public static String befoDay(String format) {         return DateUtils.dateToString(DateUtils.nextDay(new Date(), -1), format);     }       /**      * 获取明天的日期      */     public static String afterDay() {         return DateUtils.dateToString(DateUtils.nextDay(new Date(), 1),                 DateUtils.LONG_DATE_FORMAT);     }       /**      * 取得当前时间距离1900/1/1的天数      *       * @return      */     public static int getDayNum() {         int daynum = 0;         GregorianCalendar gd = new GregorianCalendar();         Date dt = gd.getTime();         GregorianCalendar gd1 = new GregorianCalendar(1900, 1, 1);         Date dt1 = gd1.getTime();         daynum = (int) ((dt.getTime() - dt1.getTime()) / (24 * 60 * 60 * 1000));         return daynum;     }       /**      * getDayNum的逆方法(用于处理Excel取出的日期格式数据等)      *       * @param day      * @return      */     public static Date getDateByNum(int day) {         GregorianCalendar gd = new GregorianCalendar(1900, 1, 1);         Date date = gd.getTime();         date = nextDay(date, day);         return date;     }       /** 针对yyyy-MM-dd HH:mm:ss格式,显示yyyymmdd */     public static String getYmdDateCN(String datestr) {         if (datestr == null)             return "";         if (datestr.length() < 10)             return "";         StringBuffer buf = new StringBuffer();         buf.append(datestr.substring(0, 4)).append(datestr.substring(5, 7))                 .append(datestr.substring(8, 10));         return buf.toString();     }       /**      * 获取本月第一天      *       * @param format      * @return      */     public static String getFirstDayOfMonth(String format) {         Calendar cal = Calendar.getInstance();         cal.set(Calendar.DATE, 1);         return dateToString(cal.getTime(), format);     }       /**      * 获取本月最后一天      *       * @param format      * @return      */    public static String getLastDayOfMonth(String format) {         Calendar cal = Calendar.getInstance();         cal.set(Calendar.DATE, 1);         cal.add(Calendar.MONTH, 1);         cal.add(Calendar.DATE, -1);         return dateToString(cal.getTime(), format);     }                                    /**    * @desc: 获取系统 Timestamp，如（2014-12-18 17:35:46.651）    * @return Timestamp     */    public static Timestamp getCurrentSysTimestamp(){        Timestamp d = new Timestamp(System.currentTimeMillis());        return d;    }                //----------------------------------------以下是(Long和Date)(Long和yyyy-MM-dd)转换---------------------------------------------------                          /**     * 获取当前时间的秒数 1970/01/01至今的秒数，,等于new Date().getTime()/1000     * @param date     * @return     * @throws Exception     */    public static long getNowTimeStamp()    {        long stamp = 0L;        Date date1 = new Date();        Date date2 = null;        try {            date2 = (new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")).parse("1970/01/01 08:00:00");        } catch (Exception e) {            e.printStackTrace();        }        stamp = (date1.getTime() - date2.getTime()) / 1000L;        return stamp;    }        /**     * 获取当前时间的毫秒数 1970/01/01至今的毫秒数,等于new Date().getTime()     * @param date     * @return     * @throws Exception     */    public static long getNowTimeStampMs(){         long stamp = 0L;         Date date1 = new Date();         Date date2 = null;         try {             date2 = (new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")).parse("1970/01/01 08:00:00");         } catch (Exception e) {             e.printStackTrace();         }         stamp = (date1.getTime() - date2.getTime());         return stamp;    }            /**     * 时间转换成秒 1970/01/01至今的秒数（Date转long），等于new Date().getTime()/1000     * @param date     * @return     * @throws Exception     */    public static long getTimeStampByDate(Date date)     {        long stamp = 0L;        Date date1 = date;        Date date2 = null;        try {            date2 = (new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")).parse("1970/01/01 08:00:00");            stamp = (date1.getTime() - date2.getTime()) / 1000L;        } catch (Exception e) {            stamp = 0L;        }                return stamp;    }        /**     * 时间转换成秒 1970/01/01至今的豪秒数（Date转long）     * @param date     * @return     * @throws Exception     */    public static long getTimeStampMsByDate(Date date)     {        long stamp = 0L;        Date date1 = date;        Date date2 = null;        try {            date2 = (new SimpleDateFormat("yyyy/MM/dd HH:mm:ss")).parse("1970/01/01 08:00:00");            stamp = (date1.getTime() - date2.getTime());        } catch (Exception e) {            stamp = 0L;        }                return stamp;    }                        /**     * 将时间由秒转换成指定格式，如(long转：yyyy-MM-dd HH:mm:ss)     * @param second     * @param format     * @return     * @throws Exception     */    public static String getYYYYByTimeStamp(Long second, String format)    {        if(second==null||second==0){            return "";        }        Date da = null;        try {            da = (new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")).parse("1970-01-01 08:00:00");        } catch (Exception e) {            e.printStackTrace();        }        Date date = new Date(da.getTime() + second * 1000L);        return (new SimpleDateFormat(format)).format(date);    }    /**     * 将时间由毫秒转换成指定格式，如(long转：yyyy-MM-dd HH:mm:ss)     * @param second     * @param format     * @return     * @throws Exception     */    public static String getYYYYbyTimeStampMs(Long second, String format)    {        if(second==null||second==0){            return "";        }        Date da = null;        try {            da = (new SimpleDateFormat("yyyy-MM-dd HH:mm:ss")).parse("1970-01-01 08:00:00");        } catch (Exception e) {            e.printStackTrace();        }        Date date = new Date(da.getTime() + second );        return (new SimpleDateFormat(format)).format(date);    }                    /**     * 1970/01/01至今的秒数转换成Date     * @param TimeStamp     * @return     */    public static Date getDateByTimeStamp(Long TimeStamp){        return new Date(TimeStamp*1000);    }        /**     * 1970/01/01至今的豪秒数转换成Date     * @param TimeStampMs     * @return     */    public static Date getDateByTimeStampMs(Long TimeStampMs){        return new Date(TimeStampMs);    }                            }