java 日期工具

傷城~ 2021-11-02 02:28 313阅读 0赞

package com.neuxa.is.workflow.utils;
    
    import java.sql.Timestamp;
    import java.text.DateFormat;
    import java.text.ParseException;
    import java.text.ParsePosition;
    import java.text.SimpleDateFormat;
    import java.util.*;
    
    import org.apache.commons.lang3.StringUtils;
    
    /**
     * 日期工具类
     * Author:syp836
     */
    public class DateUtil {
       
    
        /**
         * 使用递归方法建树
         * @param maxpid
         * @return
         */
        public static List<BaseRecursive> buildByRecursive(List<BaseRecursive> recursiveList,Integer maxpid) {
       
            List<BaseRecursive> trees = new ArrayList<BaseRecursive>();
            for (BaseRecursive bean : recursiveList) {
       
                if (bean.getId().equals(maxpid)) {
       
                    trees.add(findChildren(bean, recursiveList));
                }
            }
            return trees;
        }
    
        /**
         * 递归查找子节点
         *
         * @param baseRecursive
         * @param quyuses
         * @return
         */
        public static BaseRecursive findChildren(BaseRecursive baseRecursive, List<BaseRecursive> quyuses) {
       
            for (BaseRecursive it : quyuses) {
       
                if (baseRecursive.getId().equals(it.getPid())) {
       
                    if (baseRecursive.getNodes() == null) {
       
                        baseRecursive.setNodes(new ArrayList<BaseRecursive>());
                    }
                    baseRecursive.getNodes().add(findChildren(it, quyuses));
                }
            }
            return baseRecursive;
        }
    
    //    public static void main(String[] args) {
       
        // System.out.println(getStartTime(new Date()));
        // System.out.println(getEndTime(new Date()));
        //
        //
        // System.out.println("获取本月第一天日期:" + getFirstDayTimeOfMonth());
        // System.out.println("获取本月最后一天日期:" + getLastDayTimeOfMonth());
    
        // System.out.println("一周前日期：" + date2String(addDays(-7)));
        // System.out.println("两天前日期：" + date2String(addDays(-2)));
        // System.out.println("昨天日期：" + date2String(addDays(-1)));
        // System.out.println("今天日期：" + date2String(addDays(0)));
        // System.out.println("明天日期：" + date2String(addDays(1)));
        // System.out.println("两天后日期：" + date2String(addDays(2)));
        // System.out.println("一周后日期：" + date2String(addDays(7)));
        //
        // System.out.println("获取当天日期:" + getNowTime("yyyy-MM-dd"));
        // System.out.println("获取本周一日期:" + getMondayOFWeek());
        // System.out.println("获取本周日的日期~:" + getCurrentWeekday());
        // System.out.println("获取上周一日期:" + getPreviousWeekday());
        // System.out.println("获取上周日日期:" + getPreviousWeekSunday());
        // System.out.println("获取下周一日期:" + getNextMonday());
        // System.out.println("获取下周日日期:" + getNextSunday());
        // System.out.println("获取本月第一天日期:" + getFirstDayOfMonth());
        // System.out.println("获取本月最后一天日期:" + getDefaultDay());
        // System.out.println("获取上月第一天日期:" + getPreviousMonthFirst());
        // System.out.println("获取上月最后一天的日期:" + getPreviousMonthEnd());
        // System.out.println("获取下月第一天日期:" + getNextMonthFirst());
        // System.out.println("获取下月最后一天日期:" + getNextMonthEnd());
        // System.out.println("获取本年的第一天日期:" + getCurrentYearFirst());
        // System.out.println("获取本年最后一天日期:" + getCurrentYearEnd());
        // System.out.println("获取去年的第一天日期:" + getPreviousYearFirst());
        // System.out.println("获取去年的最后一天日期:" + getPreviousYearEnd());
        // System.out.println("获取明年第一天日期:" + getNextYearFirst());
        // System.out.println("获取明年最后一天日期:" + getNextYearEnd());
        // System.out.println("获取本季度第一天到最后一天:" + getThisSeasonTime(11));
        // System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9.29:" +
        // getTwoDay("2008-12-1", "2008-9-29"));
    
    //    System.out.println(getNowTimeStampTime().getTime());
    //    System.out.println(getLongAgoYear());
    //
    //    }
    
        // 用来全局控制 上一周，本周，下一周的周数变化
        private static int weeks = 0;
    
        private static int MaxDate;// 一月最大天数
    
        private static int MaxYear;// 一年最大天数
    
        private static String defaultDatePattern = null;
        private static String timePattern = "HH:mm";
    
        public static final String TS_FORMAT = DateUtil.getDatePattern() + " HH:mm:ss.S";
        /** 日期格式yyyy-MM字符串常量 */
        public static final String MONTH_FORMAT = "yyyy-MM";
        /** 日期格式yyyyMM字符串常量 */
        public static final String MONTH_FORMAT_SHORT = "yyyyMM";
        /** 日期格式yyyy-MM-dd字符串常量 */
        public static final String DATE_FORMAT = "yyyy-MM-dd";
        public static final String DATE_FORMAT_DIT = "yyyy.MM.dd";
        /** 日期格式yyyyMMdd字符串常量 */
        public static final String DATE_FORMAT_SHORT = "yyyyMMdd";
        /** 日期格式yyyyMMddHHmm字符串常量 */
        public static final String DATE_FORMAT_LONG = "yyyyMMddHHmm";
    
        public static final String DATE_FORMAT_MD = "MMdd";
    
        public static final String DATE_FORMAT_CHN_MD = "M月dd日";
    
        /** 日期格式yyyy MM dd字符串常量 */
        public static final String DATE_FORMAT_BANK = "yyyy MM dd";
    
    
        /** 日期格式HH:mm:ss字符串常量 */
        public static final String HOUR_FORMAT = "HH:mm:ss";
        /** 日期格式yyyy-MM-dd HH:mm:ss字符串常量 */
        public static final String DATETIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
        /** 日期格式yyyy-MM-dd HH:mm:ss字符串常量 */
        public static final String DATETIME_FORMAT1 = "yyyy-MM-dd 00:00:00";
        /** 日期格式yyyy-MM-dd HH:mm:ss字符串常量 */
        public static final String DATETIME_FORMAT0 = "yyyy-MM-dd 01:00:00";
        /** 日期格式yyyy-MM-dd HH:mm:ss字符串常量 */
        public static final String DATETIME_FORMAT2 = "yyyy-MM-dd 23:59:59";
        /** 格式化到小时 */
        public static final String HOUR_DATETIME_FORMAT = "yyyy-MM-dd HH";
    
        /** 日期格式yyyy-MM-dd HH:mm:ss字符串常量 */
        public static final String MILLISECOND_DATETIME_FORMAT = "yyyy-MM-dd HH:mm:ss.S";
    
        /** 日期格式yyyy-MM-dd HH:mm:ss字符串常量 */
        public static final String MILLI3SECOND_DATETIME_FORMAT = "yyyy-MM-dd HH:mm:ss.SSS";
    
        /** 日期格式yyyy-MM-dd HH:mm:ss字符串常量 */
        public static final String yyyyMMddHHmmss_FORMAT = "yyyyMMddHHmmss";
    
        public static final String yyyyMMddHHmmssSSS_FORMAT = "yyyyMMddHHmmssSSS";
    
        /** 某天开始时分秒字符串常量 00:00:00 */
        public static final String DAY_BEGIN_STRING_HHMMSS = " 00:00:00";
        /** 某天结束时分秒字符串常量 23:59:59 */
        public static final String DAY_END_STRING_HHMMSS = " 23:59:59";
        private static SimpleDateFormat sdf_date_format = new SimpleDateFormat(DATE_FORMAT);
    
        private static SimpleDateFormat sdf_date_format_bank = new SimpleDateFormat(DATE_FORMAT_BANK);
    
        private static SimpleDateFormat sdf_hour_format = new SimpleDateFormat(HOUR_FORMAT);
        private static SimpleDateFormat sdf_datetime_format = new SimpleDateFormat(DATETIME_FORMAT);
        private static SimpleDateFormat sdf_datetime_format2 = new SimpleDateFormat(yyyyMMddHHmmss_FORMAT);
    
        /**
         * 对比paramDate与系统时间，>1 系统时间大于paramDate，<1 系统时间小于paramDate
         * @param paramDate
         * @return
         */
        public static int compareToSysDate(Date paramDate){
       
            Date sysdate=new Date();
            return  sysdate.compareTo(paramDate);
        }
        public static long calTowDateOfDay(Date endDate,Date nowDate){
       
            long nd = 1000 * 24 * 60 * 60;
            long diff = endDate.getTime() - nowDate.getTime();
            // 计算差多少天
            long day = diff / nd;
            return day;
        }
        public static long calTowDateOfHour(Date endDate,Date nowDate){
       
            long nd = 1000 * 24 * 60 * 60;
            long nh = 1000 * 60 * 60;
            long diff = endDate.getTime() - nowDate.getTime();
            // 计算差多少小时
            long hour = diff % nd / nh;
            return hour;
        }
        public static long calTowDateOfMin(Date endDate,Date nowDate){
       
            long nd = 1000 * 24 * 60 * 60;
            long nh = 1000 * 60 * 60;
            long nm = 1000 * 60;
            long diff = endDate.getTime() - nowDate.getTime();
            // 计算差多少分钟
            long min = diff % nd % nh / nm;
            return min;
        }
        public static long calTowDateOfSecond(Date endDate,Date nowDate){
       
            long nd = 1000 * 24 * 60 * 60;
            long nh = 1000 * 60 * 60;
            long nm = 1000 * 60;
            long ns = 1000;
            long diff = endDate.getTime() - nowDate.getTime();
            // 计算差多少分钟
            long second = diff % nd % nh % nm / ns;
            return second;
        }
        public static String calTime(Date nowDate,Date create_time){
       
            String subTime="";
            long min = 0;
            long day;
            long hour = 0;
            long second = DateUtil.calTowDateOfSecond(nowDate, create_time);
            min = DateUtil.calTowDateOfMin(nowDate, create_time);
            hour = DateUtil.calTowDateOfHour(nowDate, create_time);
            day = DateUtil.calTowDateOfDay(nowDate, create_time);
            if (day > 0) {
       
                subTime = day + "天前";
            } else if (hour > 0) {
       
                subTime = hour + "小时前";
            } else if (min > 0) {
       
                subTime = min + "分钟前";
            }else if(second > 0) {
       
                subTime = second + "秒前";
            }
            return subTime;
        }
        public DateUtil() {
       
        }
    
    
        /**
         * 自定义格式化日期,
         * @param format
         * @param date
         * @return
         */
        public static String formatDateTime(String  format,Date date) {
       
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(format);
        try {
       
            return simpleDateFormat.format(date.getTime());
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getDateTime():" + e.getMessage());
            return "";
        }
        }
    
        /**
         * 获得服务器当前日期及时间，以格式为：yyyy-MM-dd HH:mm:ss的日期字符串形式返回
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static String getDateTime() {
       
        try {
       
            return sdf_datetime_format.format(Calendar.getInstance().getTime());
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getDateTime():" + e.getMessage());
            return "";
        }
        }
    
        /**
         * 获得服务器当前日期，以格式为：yyyy-MM-dd的日期字符串形式返回
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static String getDate() {
       
        try {
       
            return sdf_date_format.format(Calendar.getInstance().getTime());
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getDate():" + e.getMessage());
            return "";
        }
        }
    
        /**
         * 获得服务器当前日期，以格式为：yyyy MM dd的日期字符串形式返回
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static String getDateWithBank() {
       
            try {
       
                return sdf_date_format_bank.format(Calendar.getInstance().getTime());
            } catch (Exception e) {
       
    //            logger.debug("DateUtil.getDateWithBank():" + e.getMessage());
                return "";
            }
        }
    
        /**
         * 获得服务器当前时间，以格式为：HH:mm:ss的日期字符串形式返回
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static String getTime() {
       
        String temp = " ";
        try {
       
            temp += sdf_hour_format.format(Calendar.getInstance().getTime());
            return temp;
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getTime():" + e.getMessage());
            return "";
        }
        }
    
        /**
         * 统计时开始日期的默认值
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static String getStartDate() {
       
        try {
       
            return getYear() + "-01-01";
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getStartDate():" + e.getMessage());
            return "";
        }
        }
    
        /**
         * 统计时结束日期的默认值
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static String getEndDate() {
       
        try {
       
            return getDate();
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getEndDate():" + e.getMessage());
            return "";
        }
        }
    
        /**
         * 获得服务器当前日期的年份
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static String getYear() {
       
        try {
       
            return String.valueOf(Calendar.getInstance().get(Calendar.YEAR));
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getYear():" + e.getMessage());
            return "";
        }
        }
    
        /**
         * 获得服务器当前日期的年份
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static Date getLongAgoYear() {
       
            Date date = null;
            try {
       
    
                Calendar calendar = Calendar.getInstance();
                calendar.set(1900, 0, 0, 00, 00, 00);
                date = calendar.getTime();
                return date;
            } catch (Exception e) {
       
    //            logger.debug("DateUtil.getYear():" + e.getMessage());
    
                return null;
            }
        }
    
    
    
        /**
         * 获得服务器当前日期的月份
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static String getMonth() {
       
        try {
       
            java.text.DecimalFormat df = new java.text.DecimalFormat();
            df.applyPattern("00;00");
            return df.format((Calendar.getInstance().get(Calendar.MONTH) + 1));
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getMonth():" + e.getMessage());
            return "";
        }
        }
    
        /**
         * 获得服务器在当前月中天数
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static String getDay() {
       
        try {
       
            return String.valueOf(Calendar.getInstance().get(Calendar.DAY_OF_MONTH));
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getDay():" + e.getMessage());
            return "";
        }
        }
    
        /**
         * 比较两个日期相差的天数
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param date1
         * @param date2
         * @return
         */
        public static int getMargin(String date1, String date2) {
       
        int margin;
        try {
       
            ParsePosition pos = new ParsePosition(0);
            ParsePosition pos1 = new ParsePosition(0);
            Date dt1 = sdf_date_format.parse(date1, pos);
            Date dt2 = sdf_date_format.parse(date2, pos1);
            long l = dt1.getTime() - dt2.getTime();
            margin = (int) (l / (24 * 60 * 60 * 1000));
            return margin;
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getMargin():" + e.toString());
            return 0;
        }
        }
    
        /**
         * 比较两个日期相差的天数
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param date1
         * @param date2
         * @return
         */
        public static double getDoubleMargin(String date1, String date2) {
       
        double margin;
        try {
       
            ParsePosition pos = new ParsePosition(0);
            ParsePosition pos1 = new ParsePosition(0);
            Date dt1 = sdf_datetime_format.parse(date1, pos);
            Date dt2 = sdf_datetime_format.parse(date2, pos1);
            long l = dt1.getTime() - dt2.getTime();
            margin = (l / (24 * 60 * 60 * 1000.00));
            return margin;
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getMargin():" + e.toString());
            return 0;
        }
        }
    
        /**
         * 比较两个日期相差的月数
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param date1
         * @param date2
         * @return
         */
        public static int getMonthMargin(String date1, String date2) {
       
        int margin;
        try {
       
            margin = (Integer.parseInt(date2.substring(0, 4)) - Integer.parseInt(date1.substring(0, 4))) * 12;
            margin += (Integer.parseInt(date2.substring(4, 7).replaceAll("-0", "-")) - Integer.parseInt(date1
            .substring(4, 7).replaceAll("-0", "-")));
            return margin;
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getMargin():" + e.toString());
            return 0;
        }
        }
    
        /**
         * 返回日期加X天后的日期
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param date
         * @param i
         * @return
         */
        public static String addDay(String date, int i) {
       
        try {
       
            GregorianCalendar gCal = new GregorianCalendar(Integer.parseInt(date.substring(0, 4)),
            Integer.parseInt(date.substring(5, 7)) - 1, Integer.parseInt(date.substring(8, 10)));
            gCal.add(GregorianCalendar.DATE, i);
            return sdf_date_format.format(gCal.getTime());
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.addDay():" + e.toString());
            return getDate();
        }
        }
    
        /**
         * 返回日期加X月后的日期
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param date
         * @param i
         * @return
         */
        public static String addMonth(String date, int i) {
       
        try {
       
            GregorianCalendar gCal = new GregorianCalendar(Integer.parseInt(date.substring(0, 4)),
            Integer.parseInt(date.substring(5, 7)) - 1, Integer.parseInt(date.substring(8, 10)));
            gCal.add(GregorianCalendar.MONTH, i);
            return sdf_date_format.format(gCal.getTime());
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.addMonth():" + e.toString());
            return getDate();
        }
        }
    
        /**
         * 返回日期加X年后的日期
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param date
         * @param i
         * @return
         */
        public static String addYear(String date, int i) {
       
        try {
       
            GregorianCalendar gCal = new GregorianCalendar(Integer.parseInt(date.substring(0, 4)),
            Integer.parseInt(date.substring(5, 7)) - 1, Integer.parseInt(date.substring(8, 10)));
            gCal.add(GregorianCalendar.YEAR, i);
            return sdf_date_format.format(gCal.getTime());
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.addYear():" + e.toString());
            return "";
        }
        }
    
        /**
         * 返回某年某月中的最大天
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static int getMaxDay(int iyear, int imonth) {
       
        int day = 0;
        try {
       
            if (imonth == 1 || imonth == 3 || imonth == 5 || imonth == 7 || imonth == 8 || imonth == 10 || imonth == 12) {
       
            day = 31;
            } else if (imonth == 4 || imonth == 6 || imonth == 9 || imonth == 11) {
       
            day = 30;
            } else if ((0 == (iyear % 4)) && (0 != (iyear % 100)) || (0 == (iyear % 400))) {
       
            day = 29;
            } else {
       
            day = 28;
            }
            return day;
        } catch (Exception e) {
       
    //        logger.debug("DateUtil.getMonthDay():" + e.toString());
            return 1;
        }
        }
    
        /**
         * 格式化日期
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param cal
         * @param Type
         * @param Span
         * @return
         */
    
    
        public static String rollDate(Calendar cal, int Type, int Span) {
       
        try {
       
            String temp = "";
            Calendar rolcale;
            rolcale = cal;
            rolcale.add(Type, Span);
            temp = sdf_date_format.format(rolcale.getTime());
            return temp;
        } catch (Exception e) {
       
            return "";
        }
        }
    
        /**
         * 返回默认的日期格式
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static synchronized String getDatePattern() {
       
        defaultDatePattern = DATETIME_FORMAT;
        return defaultDatePattern;
        }
    
        /**
         * 将指定日期按默认格式进行格式代化成字符串后输出如：yyyy-MM-dd
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param aDate
         * @return
         */
        public static final String getDate(Date aDate) {
       
        SimpleDateFormat df = null;
        String returnValue = "";
        if (aDate != null) {
       
            df = new SimpleDateFormat(getDatePattern());
            returnValue = df.format(aDate);
        }
        return (returnValue);
        }
    
        /**
         * 取得给定日期的时间字符串，格式为当前默认时间格式
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param theTime
         * @return
         */
        public static String getTimeNow(Date theTime) {
       
        return getDateTime(timePattern, theTime);
        }
    
        /**
         * 取得当前时间的Calendar日历对象
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         * @throws ParseException
         */
        public Calendar getToday() throws ParseException {
       
        Date today = new Date();
        SimpleDateFormat df = new SimpleDateFormat(getDatePattern());
        String todayAsString = df.format(today);
        Calendar cal = new GregorianCalendar();
        cal.setTime(convertStringToDate(todayAsString));
        return cal;
        }
    
        /**
         * 将日期类转换成指定格式的字符串形式
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param aMask
         * @param aDate
         * @return
         */
        public static final String getDateTime(String aMask, Date aDate) {
       
        SimpleDateFormat df = null;
        String returnValue = "";
    
        if (aDate == null) {
       
    //        logger.error("aDate is null!");
        } else {
       
            df = new SimpleDateFormat(aMask);
            returnValue = df.format(aDate);
        }
        return (returnValue);
        }
    
        /**
         * 将指定的日期转换成默认格式的字符串形式
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param aDate
         * @return
         */
        public static final String convertDateToString(Date aDate) {
       
        return getDateTime(getDatePattern(), aDate);
        }
    
        /**
         * 将日期字符串按指定格式转换成日期类型
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param aMask
         *            指定的日期格式，如:yyyy-MM-dd
         * @param strDate
         *            待转换的日期字符串
         * @return
         * @throws ParseException
         */
        public static final Date convertStringToDate(String aMask, String strDate) throws ParseException {
       
        SimpleDateFormat df = null;
        Date date = null;
        df = new SimpleDateFormat(aMask);
    
    //    if (logger.isDebugEnabled()) {
       
    //        logger.debug("converting '" + strDate + "' to date with mask '" + aMask + "'");
    //    }
        try {
       
            date = df.parse(strDate);
        } catch (ParseException pe) {
       
    //        logger.error("ParseException: " + pe);
            throw pe;
        }
        return (date);
        }
    
        public static final String formatDate(String format, String strDate) {
       
            SimpleDateFormat df = null;
            Date date = null;
            df = new SimpleDateFormat(format);
    //        if (logger.isDebugEnabled()) {
       
    //            logger.debug("converting ".concat(strDate).concat(" to date with mask ").concat(format));
    //        }
            try {
       
                date = df.parse(strDate);
            } catch (Exception e) {
       
    //            logger.error(e.getMessage(), e);
            }
            return getDateTime(format,date);
        }
    
        /**
         * 将日期字符串按默认格式转换成日期类型
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param strDate
         * @return
         * @throws ParseException
         */
        public static Date convertStringToDate(String strDate) throws ParseException {
       
        Date aDate = null;
    
        try {
       
    //        if (logger.isDebugEnabled()) {
       
    //        logger.debug("converting date with pattern: " + getDatePattern());
    //        }
            aDate = convertStringToDate(getDatePattern(), strDate);
        } catch (ParseException pe) {
       
    //        logger.error("Could not convert '" + strDate + "' to a date, throwing exception");
            throw new ParseException(pe.getMessage(), pe.getErrorOffset());
        }
        return aDate;
        }
    
        /**
         * 返回一个JAVA简单类型的日期字符串
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        public static String getSimpleDateFormat() {
       
        SimpleDateFormat formatter = new SimpleDateFormat();
        String NDateTime = formatter.format(new Date());
        return NDateTime;
        }
    
        /**
         * 将指定字符串格式的日期与当前时间比较
         * 
         * @author DYLAN
         * @date Feb 17, 2012
         * @param strDate
         *            需要比较时间
         * @return <p>
         *         int code
         *         <ul>
         *         <li>-1 当前时间 < 比较时间</li>
         *         <li>0 当前时间 = 比较时间</li>
         *         <li>>=1当前时间 > 比较时间</li>
         *         </ul>
         *         </p>
         */
        public static int compareToCurTime(String strDate) {
       
        if (StringUtils.isEmpty(strDate)) {
       
            return -1;
        }
        Date curTime = Calendar.getInstance().getTime();
        String strCurTime = null;
        try {
       
            strCurTime = sdf_datetime_format.format(curTime);
        } catch (Exception e) {
       
    //        if (logger.isDebugEnabled()) {
       
    //        logger.debug("[Could not format '" + strDate + "' to a date, throwing exception:"
    //        + e.getLocalizedMessage() + "]");
    //        }
        }
        if (StringUtils.isEmpty(strCurTime)) {
       
            return strCurTime.compareTo(strDate);
        }
        return -1;
        }
    
        /**
         * 为查询日期添加最小时间
         * 
         * @param param
         * @return
         */
        @SuppressWarnings("deprecation")
        public static Date addStartTime(Date param) {
       
        Date date = param;
        try {
       
            date.setHours(0);
            date.setMinutes(0);
            date.setSeconds(0);
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            calendar.set(Calendar.MILLISECOND, 0);
            return calendar.getTime();
        } catch (Exception ex) {
       
            return date;
        }
        }
    
        /**
         * 为查询日期添加最大时间
         * 
         * @return
         */
        @SuppressWarnings("deprecation")
        public static Date addEndTime(Date param) {
       
        Date date = param;
        try {
       
            date.setHours(23);
            date.setMinutes(59);
            date.setSeconds(59);
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(date);
            calendar.set(Calendar.MILLISECOND, 999);
            return calendar.getTime();
        } catch (Exception ex) {
       
            return date;
        }
        }
    
        /**
         * 返回系统现在年份中指定月份的天数
         * 
         * @param month
         * @return 指定月的总天数
         */
        @SuppressWarnings("deprecation")
        public static String getMonthLastDay(int month) {
       
        Date date = new Date();
        int[][] day = { { 0, 30, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
            { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } };
        int year = date.getYear() + 1900;
        if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
       
            return day[1][month] + "";
        } else {
       
            return day[0][month] + "";
        }
        }
    
        /**
         * 返回指定年份中指定月份的天数
         * 
         * @param year
         * @param month
         * @return 指定月的总天数
         */
        public static String getMonthLastDay(int year, int month) {
       
        int[][] day = { { 0, 30, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 },
            { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } };
        if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
       
            return day[1][month] + "";
        } else {
       
            return day[0][month] + "";
        }
        }
    
        /**
         * 判断是平年还是闰年
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @param year
         * @return
         */
        public static boolean isLeapyear(int year) {
       
        if ((year % 4 == 0 && year % 100 != 0) || (year % 400) == 0) {
       
            return true;
        } else {
       
            return false;
        }
        }
    
        /**
         * 取得当前时间的日戳
         * 
         * @author dylan_xu
         * @date Mar 11, 2012
         * @return
         */
        @SuppressWarnings("deprecation")
        public static String getTimestamp() {
       
        Date date = Calendar.getInstance().getTime();
        String timestamp = "" + (date.getYear() + 1900) + date.getMonth() + date.getDate() + date.getMinutes()
        + date.getSeconds() + date.getTime();
        return timestamp;
        }
    
        /**
         * 取得指定时间的日戳
         * 
         * @return
         */
        @SuppressWarnings("deprecation")
        public static String getTimestamp(Date date) {
       
        String timestamp = "" + (date.getYear() + 1900) + date.getMonth() + date.getDate() + date.getMinutes()
        + date.getSeconds() + date.getTime();
        return timestamp;
        }
    
        /**
         * @Title: getStartTime
         * @Description: 取某一天的最开始的时分秒
         * @param param
         * @return 参数说明
         * @return String 返回类型
         */
        public static String getStartTime(Date param) {
       
        return sdf_datetime_format.format(addStartTime(param));
        }
    
        public static String getStartTime2(Date param) {
       
        return sdf_datetime_format2.format(addStartTime(param));
        }
    
        /**
         * @Title: getEndTime
         * @Description: 取某一天的结束时分秒
         * @param param
         * @return 参数说明
         * @return String 返回类型
         */
        public static String getEndTime(Date param) {
       
        return sdf_datetime_format.format(addEndTime(param));
        }
    
        public static String getEndTime2(Date param) {
       
           return sdf_datetime_format2.format(addEndTime(param));
           }
    
        /**
         * 获得当前时间，格式yyyy-MM-dd hh:mm:ss
         * 
         * @return
         */
        public static String getCurrentDate() {
       
        return getCurrentDate(DATETIME_FORMAT);
        }
    
        /**
         * 获得当前时间，格式自定义
         * 
         * @param format
         * @return
         */
        public static String getCurrentDate(String format) {
       
        if (StringUtils.isBlank(format)) {
       
            format = DATETIME_FORMAT;
        }
        Calendar day = Calendar.getInstance();
        day.add(Calendar.DATE, 0);
        SimpleDateFormat sdf = new SimpleDateFormat(format);// "yyyy-MM-dd"
        String date = sdf.format(day.getTime());
        return date;
        }
    
        /**
         * 日期转字符串
         * 
         * @param date
         * @return
         */
        public static String date2String(Date date) {
       
        SimpleDateFormat sdf = new SimpleDateFormat(DATETIME_FORMAT);
        return sdf.format(date);
        }
    
        /**
         * 获得昨天时间
         * 
         * @return
         */
        public static String getYesterdayDate() {
       
        return getYesterdayDate(DATETIME_FORMAT);
        }
    
        /**
         * 获得昨天时间，格式自定义
         * 
         * @param format
         * @return
         */
        public static String getYesterdayDate(String format) {
       
        if ("".equals(format)) {
       
            format = DATETIME_FORMAT;
        }
        Calendar day = Calendar.getInstance();
        day.add(Calendar.DATE, -1);
        SimpleDateFormat sdf = new SimpleDateFormat(format);// "yyyy-MM-dd"
        String date = sdf.format(day.getTime());
        return date;
        }
    
        /**
         *            需要比较的时间 不能为空(null),需要正确的日期格式 ,如：2009-09-12
         *            被比较的时间 为空(null)则为当前时间
         * @param stype
         *            返回值类型 0为多少天，1为多少个月，2为多少年
         * @return 举例： compareDate("2009-09-12", null, 0); //比较天
         *         compareDate("2009-09-12", null, 1);//比较月
         *         compareDate("2009-09-12", null, 2);//比较年
         */
        public static int compareDate(String startDay, String endDay, int stype) {
       
        int n = 0;
        String formatStyle = stype == 1 ? "yyyy-MM" : "yyyy-MM-dd";
    
        endDay = endDay == null ? getCurrentDate("yyyy-MM-dd") : endDay;
    
        DateFormat df = new SimpleDateFormat(formatStyle);
        Calendar c1 = Calendar.getInstance();
        Calendar c2 = Calendar.getInstance();
        try {
       
            c1.setTime(df.parse(startDay));
            c2.setTime(df.parse(endDay));
        } catch (Exception e3) {
       
            System.out.println("wrong occured");
        }
        // List list = new ArrayList();
        while (!c1.after(c2)) { // 循环对比，直到相等，n 就是所要的结果
            // list.add(df.format(c1.getTime())); // 这里可以把间隔的日期存到数组中 打印出来
            n++;
            if (stype == 1) {
       
            c1.add(Calendar.MONTH, 1); // 比较月份，月份+1
            } else {
       
            c1.add(Calendar.DATE, 1); // 比较天数，日期+1
            }
        }
        n = n - 1;
        if (stype == 2) {
       
            n = (int) n / 365;
        }
        // System.out.println(startDay+" -- "+endDay+" 相差多少"+u[stype]+":"+n);
        return n;
        }
    
        /**
         * 判断时间是否符合时间格式
         */
        public static boolean isDate(String date, String dateFormat) {
       
        if (date != null) {
       
            SimpleDateFormat format = new SimpleDateFormat(dateFormat);
            format.setLenient(false);
            try {
       
            format.format(format.parse(date));
            } catch (ParseException e) {
       
            return false;
            }
            return true;
        }
        return false;
        }
    
        /**
         * 实现给定某日期，判断是星期几 date:必须yyyy-MM-dd格式
         */
        public static String getWeekday(String date) {
       
        SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
        SimpleDateFormat sdw = new SimpleDateFormat("E");
        Date d = null;
        try {
       
            d = sd.parse(date);
        } catch (ParseException e) {
       
    //        logger.error(e.getMessage(), e);
        }
        return sdw.format(d);
        }
    
        /**
         * method 将字符串类型的日期转换为一个timestamp（时间戳记java.sql.Timestamp）
         * 
         * @param dateString
         *            需要转换为timestamp的字符串
         * @return dataTime timestamp
         */
        public final static Timestamp string2Time(String dateString) {
       
        DateFormat dateFormat;
        dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.ENGLISH);// 设定格式
        dateFormat.setLenient(false);
        Date date = null;
        try {
       
            date = dateFormat.parse(dateString);
        } catch (ParseException e) {
       
    //        logger.error(e.getMessage(), e);
        }
        // java.sql.Timestamp dateTime = new java.sql.Timestamp(date.getTime());
        return new Timestamp(date.getTime());// Timestamp类型,timeDate.getTime()返回一个long型
        }
    
        /**
         * method 将字符串类型的日期转换为一个Date（java.sql.Date）
         * 
         * @param dateString
         *            需要转换为Date的字符串
         * @return dataTime Date
         */
        public final static java.sql.Date string2Date(String dateString) {
       
        DateFormat dateFormat;
        dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH);
        dateFormat.setLenient(false);
        Date date = null;
        try {
       
            date = dateFormat.parse(dateString);
        } catch (ParseException e) {
       
    //        logger.error(e.getMessage(), e);
        }
        // java.sql.Date dateTime = new java.sql.Date(date.getTime());// sql类型
        return new java.sql.Date(date.getTime());
        }
    
    
        /** 
        * @Title: string2Date 
        * @Description: 
        * @param dateString
        * @param df
        * @return    参数说明
        * @return java.util.Date    返回类型 
        */
        public final static Date string2Date(String dateString,String df) {
       
            DateFormat dateFormat = new SimpleDateFormat(df, Locale.SIMPLIFIED_CHINESE);
            dateFormat.setLenient(false);
            Date date = null;
            try {
       
                date = dateFormat.parse(dateString);
            } catch (ParseException e) {
       
    //            logger.error(e.getMessage(), e);
            }
            return date;
        }
    
        /**
         * 计算两个日期之间相差的天数
         * 
         * @param date1
         * @param date2
         * @return
         */
        public static int daysBetween(Date date1, Date date2) {
       
        Calendar cal = Calendar.getInstance();
        cal.setTime(date1);
        long time1 = cal.getTimeInMillis();
        cal.setTime(date2);
        long time2 = cal.getTimeInMillis();
        long between_days = (time2 - time1) / (1000 * 3600 * 24);
    
        return Integer.parseInt(String.valueOf(between_days));
        }
    
        /**
         * 取得当前日期N天后的日期
         * 
         * @param days
         * @return
         */
        public static Date addDays(int days) {
       
        Calendar cal = Calendar.getInstance();
    
        cal.add(Calendar.DAY_OF_MONTH, days);
    
        return cal.getTime();
        }
    
        /**
         * 取得指定日期N天后的日期
         * 
         * @param date
         * @param days
         * @return
         */
        public static Date addXDays(Date date, int days) {
       
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
    
        cal.add(Calendar.DAY_OF_MONTH, days);
    
        return cal.getTime();
        }
    
        // 记录考勤， 记录迟到、早退时间
        public static String getState() {
       
        String state = "正常";
        DateFormat df = new SimpleDateFormat("HH:mm:ss");
        Date d = new Date();
        try {
       
            Date d1 = df.parse("08:00:00");
            Date d2 = df.parse(df.format(d));
            Date d3 = df.parse("17:30:00");
    
            int t1 = (int) d1.getTime();
            int t2 = (int) d2.getTime();
            int t3 = (int) d3.getTime();
            if (t2 < t1) {
       
    
            long between = (t1 - t2) / 1000;// 除以1000是为了转换成秒
            long hour1 = between % (24 * 3600) / 3600;
            long minute1 = between % 3600 / 60;
    
            state = "迟到 ：" + hour1 + "时" + minute1 + "分";
    
            } else if (t2 < t3) {
       
            long between = (t3 - t2) / 1000;// 除以1000是为了转换成秒
            long hour1 = between % (24 * 3600) / 3600;
            long minute1 = between % 3600 / 60;
            state = "早退 ：" + hour1 + "时" + minute1 + "分";
            }
            return state;
        } catch (Exception e) {
       
            return state;
        }
        }
    
        /**
         * 得到二个日期间的间隔天数
         */
        public static String getTwoDay(String sj1, String sj2) {
       
        SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
        long day = 0;
        try {
       
            Date date = myFormatter.parse(sj1);
            Date mydate = myFormatter.parse(sj2);
            day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
        } catch (Exception e) {
       
            return "";
        }
        return day + "";
        }
    
        /**
         * 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());
        }
    
        /**
         * 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;
        }
    
        /**
         * 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;
        try {
       
            date = myFormatter.parse(date1);
            mydate = myFormatter.parse(date2);
        } catch (Exception e) {
       
        }
        long day = (date.getTime() - mydate.getTime()) / (24 * 60 * 60 * 1000);
        return day;
        }
    
        // 计算当月最后一天,返回字符串
        public static String getDefaultDay() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    
        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        lastDate.add(Calendar.MONTH, 1);// 加一个月，变为下月的1号
        lastDate.add(Calendar.DATE, -1);// 减去一天，变为当月最后一天
    
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        // 计算当月最后一天,返回字符串
        public static String getLastDayTimeOfMonth() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat(DATETIME_FORMAT);
    
        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        lastDate.add(Calendar.MONTH, 1);// 加一个月，变为下月的1号
        lastDate.add(Calendar.DATE, -1);// 减去一天，变为当月最后一天
        lastDate.set(Calendar.HOUR_OF_DAY, 23);
        lastDate.set(Calendar.MINUTE, 59);
        lastDate.set(Calendar.SECOND, 59);
    
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        // 计算当月最后一天,返回字符串
        public static String getLastDayTimeOfMonth2() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat(yyyyMMddHHmmss_FORMAT);
    
        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        lastDate.add(Calendar.MONTH, 1);// 加一个月，变为下月的1号
        lastDate.add(Calendar.DATE, -1);// 减去一天，变为当月最后一天
        lastDate.set(Calendar.HOUR_OF_DAY, 23);
        lastDate.set(Calendar.MINUTE, 59);
        lastDate.set(Calendar.SECOND, 59);
    
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        // 上月第一天
        public static String getPreviousMonthFirst() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    
        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        lastDate.add(Calendar.MONTH, -1);// 减一个月，变为下月的1号
        // lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天
    
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        // 获取当月第一天
        public static String getFirstDayOfMonth() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    
        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        public static String getFirstDayTimeOfMonth() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat(DATETIME_FORMAT);
        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        lastDate.set(Calendar.HOUR_OF_DAY, 0);
        lastDate.set(Calendar.MINUTE, 0);
        lastDate.set(Calendar.SECOND, 0);
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        public static String getFirstDayTimeOfMonth2() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat(yyyyMMddHHmmss_FORMAT);
        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
        lastDate.set(Calendar.HOUR_OF_DAY, 0);
        lastDate.set(Calendar.MINUTE, 0);
        lastDate.set(Calendar.SECOND, 0);
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        // 获得本周星期日的日期
        public static String getCurrentWeekday() {
       
        weeks = 0;
        int mondayPlus = getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + 6);
        Date monday = currentDate.getTime();
    
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }
    
        // 获取当天时间
        public static String getNowTime(String dateformat) {
       
        Date now = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat(dateformat);// 可以方便地修改日期格式
        String hehe = dateFormat.format(now);
        return hehe;
        }
    
        // 获得当前日期与本周日相差的天数
        public static int getMondayPlus() {
       
        Calendar cd = Calendar.getInstance();
        // 获得今天是一周的第几天，星期日是第一天，星期二是第二天......
        int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK) - 1; // 因为按中国礼拜一作为第一天所以这里减1
        if (dayOfWeek == 1) {
       
            return 0;
        } else {
       
            return 1 - dayOfWeek;
        }
        }
    
        // 获得本周一的日期
        public static String getMondayOFWeek() {
       
        weeks = 0;
        int mondayPlus = getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus);
        Date monday = currentDate.getTime();
    
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }
    
        // 获得相应周的周六的日期
        public static String getSaturday() {
       
        int mondayPlus = getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks + 6);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }
    
        // 获得上周星期日的日期
        public static String getPreviousWeekSunday() {
       
        weeks = 0;
        weeks--;
        int mondayPlus = getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + weeks);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }
    
        // 获得上周星期一的日期
        public static String getPreviousWeekday() {
       
        weeks--;
        int mondayPlus = getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 * weeks);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }
    
        // 获得下周星期一的日期
        public static String getNextMonday() {
       
        weeks++;
        int mondayPlus = getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + 7);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }
    
        // 获得下周星期日的日期
        public static String getNextSunday() {
       
    
        int mondayPlus = getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + 7 + 6);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
        }
    
        public static int getMonthPlus() {
       
        Calendar cd = Calendar.getInstance();
        int monthOfNumber = cd.get(Calendar.DAY_OF_MONTH);
        cd.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        cd.roll(Calendar.DATE, -1);// 日期回滚一天，也就是最后一天
        MaxDate = cd.get(Calendar.DATE);
        if (monthOfNumber == 1) {
       
            return -MaxDate;
        } else {
       
            return 1 - monthOfNumber;
        }
        }
    
        // 获得上月最后一天的日期
        public static String getPreviousMonthEnd() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    
        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, -1);// 减一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        lastDate.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        // 获得下个月第一天的日期
        public static String getNextMonthFirst() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    
        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, 1);// 减一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        // 获得下个月最后一天的日期
        public static String getNextMonthEnd() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    
        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, 1);// 加一个月
        lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
        lastDate.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        // 获得明年最后一天的日期
        public static String getNextYearEnd() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    
        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.YEAR, 1);// 加一个年
        lastDate.set(Calendar.DAY_OF_YEAR, 1);
        lastDate.roll(Calendar.DAY_OF_YEAR, -1);
        str = sdf.format(lastDate.getTime());
        return str;
        }
    
        // 获得明年第一天的日期
        public static String getNextYearFirst() {
       
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
    
        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.YEAR, 1);// 加一个年
        lastDate.set(Calendar.DAY_OF_YEAR, 1);
        str = sdf.format(lastDate.getTime());
        return str;
    
        }
    
        // 获得本年有多少天
        public static int getMaxYear() {
       
        Calendar cd = Calendar.getInstance();
        cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天
        cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。
        int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
        return MaxYear;
        }
    
        public static int getYearPlus() {
       
        Calendar cd = Calendar.getInstance();
        int yearOfNumber = cd.get(Calendar.DAY_OF_YEAR);// 获得当天是一年中的第几天
        cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天
        cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。
        int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
        if (yearOfNumber == 1) {
       
            return -MaxYear;
        } else {
       
            return 1 - yearOfNumber;
        }
        }
    
        // 获得本年第一天的日期
        public static String getCurrentYearFirst() {
       
        int yearPlus = getYearPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, yearPlus);
        Date yearDay = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preYearDay = df.format(yearDay);
        return preYearDay;
        }
    
        // 获得本年最后一天的日期 *
        public static String getCurrentYearEnd() {
       
        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String years = dateFormat.format(date);
        return years + "-12-31";
        }
    
        // 获得上年第一天的日期 *
        public static String getPreviousYearFirst() {
       
        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String years = dateFormat.format(date);
        int years_value = Integer.parseInt(years);
        years_value--;
        return years_value + "-1-1";
        }
    
        // 获得上年最后一天的日期
        public static String getPreviousYearEnd() {
       
        weeks--;
        int yearPlus = getYearPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, yearPlus + MaxYear * weeks + (MaxYear - 1));
        Date yearDay = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preYearDay = df.format(yearDay);
        getThisSeasonTime(11);
        return preYearDay;
        }
    
        // 获得本季度
        public static String getThisSeasonTime(int month) {
       
        int array[][] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }, { 10, 11, 12 } };
        int season = 1;
        if (month >= 1 && month <= 3) {
       
            season = 1;
        }
        if (month >= 4 && month <= 6) {
       
            season = 2;
        }
        if (month >= 7 && month <= 9) {
       
            season = 3;
        }
        if (month >= 10 && month <= 12) {
       
            season = 4;
        }
        int start_month = array[season - 1][0];
        int end_month = array[season - 1][2];
    
        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
        String years = dateFormat.format(date);
        int years_value = Integer.parseInt(years);
    
        int start_days = 1;// years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);
        int end_days = getLastDayOfMonth(years_value, end_month);
        String seasonDate = years_value + "-" + start_month + "-" + start_days + ";" + years_value + "-" + end_month
        + "-" + end_days;
        return seasonDate;
    
        }
    
        /**
         * 获取某年某月的最后一天
         * 
         * @param year
         *            年
         * @param month
         *            月
         * @return 最后一天
         */
        public static int getLastDayOfMonth(int year, int month) {
       
        if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8 || month == 10 || month == 12) {
       
            return 31;
        }
        if (month == 4 || month == 6 || month == 9 || month == 11) {
       
            return 30;
        }
        if (month == 2) {
       
            if (isLeapYear(year)) {
       
            return 29;
            } else {
       
            return 28;
            }
        }
        return 0;
        }
    
        /**
         * 是否闰年
         * 
         * @param year
         *            年
         * @return
         */
        public static boolean isLeapYear(int year) {
       
        return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
        }
    
        /**
         * 
         * @Title: getNowTimeStampTime
         * @Description: 获取当前时间（TimeStamp类型的）
         * @return
         * @return Timestamp
         * @throws
         */
        public static Timestamp getNowTimeStampTime() {
       
        Timestamp time = new Timestamp(System.currentTimeMillis());
    
        return time;
        }
    
        /**
         * 
         * @Title: calcTwoTimeDifferInOneHour
         * @Description: 计算最后一次访问时间距离现在时间是不是在1小时之内。
         * @param lastestVisitTime
         *            最后一次访问的毫秒时间
         * @param nowTime
         *            现在的毫秒时间
         * @return void
         * @throws
         */
        public static boolean calcTwoTimeDifferInOneHour(Long lastestVisitTime, Long nowTime) {
       
        long differ = nowTime - lastestVisitTime;// 两个时间的毫秒差
    
        long differHour = differ / (60 * 60 * 1000);
    
        if (differHour < 1) {
       
            return true;
        }
    
        return false;
        }
    
        /** 
        * @Title: compareDate 
        * @Description: 比较时间大小（第一个时间在第二个时间之前返回-1；第一个时间在第二个时间之后返回1，相同返回0） 
        * @param dt1
        * @param dt2
        * @return    参数说明
        * @return int    返回类型 
        */
        public static int compareDate(Date dt1, Date dt2) {
       
            try {
       
                if (dt1.getTime() > dt2.getTime()) {
       
                    return 1;
                } else if (dt1.getTime() < dt2.getTime()) {
       
                    return -1;
                } else {
       
                    return 0;
                }
            } catch (Exception e) {
       
    //            logger.error(e.getMessage(), e);
            }
            return 0;
        }
    
        public static String getPreviousMonth(String dateFormat) {
       
            String str = "";
            SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
    
            Calendar lastDate = Calendar.getInstance();
            lastDate.add(Calendar.MONTH, -1);
            str = sdf.format(lastDate.getTime());
            return str;
        }
        public static Date geLastWeekMonday(Date date) {
       
            Calendar cal = Calendar.getInstance();
            cal.setTime(getThisWeekMonday(date));
            cal.add(Calendar.DATE, -7);
            return cal.getTime();
        }
        public static Date getThisWeekMonday(Date date) {
       
            Calendar cal = Calendar.getInstance();
            cal.setTime(date);
            // 获得当前日期是一个星期的第几天
           int dayWeek = cal.get(Calendar.DAY_OF_WEEK);
            if (1 == dayWeek) {
       
                cal.add(Calendar.DAY_OF_MONTH, -1);
            }
            // 设置一个星期的第一天，按中国的习惯一个星期的第一天是星期一
           cal.setFirstDayOfWeek(Calendar.MONDAY);
            // 获得当前日期是一个星期的第几天
    
            int day = cal.get(Calendar.DAY_OF_WEEK);
            // 根据日历的规则，给当前日期减去星期几与一个星期第一天的差值
            cal.add(Calendar.DATE, cal.getFirstDayOfWeek() - day);
            return cal.getTime();
        }
            public static String getNextWeekMonday(Date date) {
       
            Calendar cal = Calendar.getInstance();
            cal.setTime(getThisWeekMonday(date));
            cal.add(Calendar.DATE, 7);
            return sdf_date_format.format(cal.getTime());
        }
        public static String getNextWeekSunday(Date date) {
       
            Calendar cal = Calendar.getInstance();
            cal.setTime(getThisWeekMonday(date));
            cal.add(Calendar.DATE, 13);
            return sdf_date_format.format(cal.getTime());
        }
        public static void main(String[] args) {
       
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            try {
       
                Date date = sdf.parse("2019-07-15");
                System.out.println("今天是" + sdf.format(date));
                System.out.println("上周一" + sdf.format(geLastWeekMonday(date)));
                System.out.println("本周一" + sdf.format(getThisWeekMonday(date)));
                System.out.println("下周一" + sdf.format(getNextWeekMonday(date)));
                System.out.println("下周日" + sdf.format(getNextWeekSunday(date)));
            } catch (Exception e) {
       
                e.printStackTrace();
            }  }
    }

转载于:https://www.cnblogs.com/DylanZ/p/11150972.html