java 日期工具类

 

 

 

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.HashMap;
import java.util.Map;


/**
 * 工具类-日期处理
 * 
 */
public class DateUtil {
    
    /**
     * 获得当前日期
     * @return
     */
    public static Date getNow() {
        Calendar cal = Calendar.getInstance();
        Date currDate = cal.getTime();
        return currDate;
    }

    /**
     * 日期转换为字符串 格式自定义
     * 
     * @param date
     * @param f
     * @return
     */
    public static String dateStr(Date date, String f) {
        SimpleDateFormat format = new SimpleDateFormat(f);
        String str = format.format(date);
        return str;
    }

    /**
     * 日期转换为字符串 MM月dd日 hh:mm
     * 
     * @param date
     * @return
     */
    public static String dateStr(Date date) {
        return dateStr(date, "MM月dd日 hh:mm");
    }

    /**
     * 日期转换为字符串 yyyy-MM-dd
     * 
     * @param date
     * @return
     */
    public static String dateStr2(Date date) {
        return dateStr(date, "yyyy-MM-dd");
    }

    /**
     * yyyy年MM月dd日HH时mm分ss秒
     * 
     * @param date
     * @return
     */
    public static String dateStr5(Date date) {
        return dateStr(date, "yyyy年MM月dd日 HH时mm分ss秒");
    }

    /**
     * yyyyMMddHHmmss
     * 
     * @param date
     * @return
     */
    public static String dateStr3(Date date) {
        return dateStr(date, "yyyyMMddHHmmss");
    }

    /**
     * yyyy-MM-dd HH:mm:ss
     * 
     * @param date
     * @return
     */
    public static String dateStr4(Date date) {
        return dateStr(date, "yyyy-MM-dd HH:mm:ss");

    }

    /**
     * yyyy年MM月dd日
     * 
     * @param date
     * @return
     */
    public static String dateStr6(Date date) {
        return dateStr(date, "yyyy年MM月dd日");
    }

    /**
     * yyyyMMdd
     * 
     * @param date
     * @return
     */
    public static String dateStr7(Date date) {
        return dateStr(date, "yyyyMMdd");
    }

    /**
     * MM-dd
     * 
     * @param date
     * @return
     */
    public static String dateStr8(Date date) {
        return dateStr(date, "MM-dd");
    }

    /**
     * MMdd
     * 
     * @param date
     * @return
     */
    public static String dateStr10(Date date) {
        return dateStr(date, "MMdd");
    }
    
    /**
     * yyyyMM
     * 
     * @param date
     * @return
     */
    public static String dateStr11(Date date) {
        return dateStr(date, "yyyyMM");
    }
    
    /**
     * yyyyMM
     * 
     * @param date
     * @return
     */
    public static String dateStr12(Date date) {
        return dateStr(date, "yyyy-MM-dd HH:mm:ss:SSS");
    }
    
    /**
     * yyyyMMddHH
     * 
     * @param date
     * @return
     */
    public static String dateStr13(Date date) {
        return dateStr(date, "yyyyMMddHH");
    }
    
    /**
     * yyyyMMddHHmm
     * 
     * @param date
     * @return
     */
    public static String dateStr14(Date date) {
        return dateStr(date, "yyyyMMddHHmm");
    }
    
    /**
     * 将时间戳转换为Date
     * 
     * @param times
     * @return
     */
    public static Date getDate(String times) {
        long time = Long.parseLong(times);
        return new Date(time * 1000);
    }

    
    /**
     * 将时间戳转换为Date
     *  10位13位时间戳都可以
     * @param times
     * @return
     */
    public static Date getCommonDate(String times) {
        if(StringUtil.isNotBlank(times)&&times.length()==10 ){
            times=times+"000";
        }
        long time = Long.parseLong(times);
        return new Date(time);
    }
    
    public static String dateStr(String times) {
        return dateStr(getDate(times));
    }

    public static String dateStr2(String times) {
        return dateStr2(getDate(times));
    }

    public static String dateStr3(String times) {
        return dateStr3(getDate(times));
    }

    public static String dateStr4(String times) {
        return dateStr4(getDate(times));
    }

    public static String dateStr5(String times) {
        return dateStr5(getDate(times));
    }

    /**
     * 将Date转换为时间戳
     * 
     * @param date
     * @return
     */
    public static long getTime(Date date) {
        return date.getTime() / 1000;
    }

    public static int getDay(Date d) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(d);
        return cal.get(Calendar.DAY_OF_MONTH);
    }

    /**
     * s - 表示 "yyyy-mm-dd" 形式的日期的 String 对象
     * 
     * @param f
     * @return
     */
    public static Date valueOf(String s) {
        final int YEAR_LENGTH = 4;
        final int MONTH_LENGTH = 2;
        final int DAY_LENGTH = 2;
        final int MAX_MONTH = 12;
        final int MAX_DAY = 31;
        int firstDash;
        int secondDash;
        int threeDash = 0;
        int fourDash = 0;
        Date d = null;

        if (s == null) {
            throw new java.lang.IllegalArgumentException();
        }

        firstDash = s.indexOf('-');
        secondDash = s.indexOf('-', firstDash + 1);
        if (s.contains(":")) {
            threeDash = s.indexOf(':');
            fourDash = s.indexOf(':', threeDash + 1);
        }
        if ((firstDash > 0) && (secondDash > 0) && (secondDash < s.length() - 1)) {
            String yyyy = s.substring(0, firstDash);
            String mm = s.substring(firstDash + 1, secondDash);
            String dd = "";
            String hh = "";
            String MM = "";
            String ss = "";
            if (s.contains(":")) {
                dd = s.substring(secondDash + 1, threeDash - 3);
                hh = s.substring(threeDash - 2, threeDash);
                MM = s.substring(threeDash + 1, fourDash);
                ss = s.substring(fourDash + 1);
            } else {
                dd = s.substring(secondDash + 1);
            }
            if (yyyy.length() == YEAR_LENGTH && mm.length() == MONTH_LENGTH && dd.length() == DAY_LENGTH) {
                int year = Integer.parseInt(yyyy);
                int month = Integer.parseInt(mm);
                int day = Integer.parseInt(dd);
                int hour = 0;
                int minute = 0;
                int second = 0;
                if (s.contains(":")) {
                    hour = Integer.parseInt(hh);
                    minute = Integer.parseInt(MM);
                    second = Integer.parseInt(ss);
                }
                if (month >= 1 && month <= MAX_MONTH) {
                    int maxDays = MAX_DAY;
                    switch (month) {
                    // February determine if a leap year or not
                        case 2:
                            if ((year % 4 == 0 && !(year % 100 == 0)) || (year % 400 == 0)) {
                                maxDays = MAX_DAY - 2; // leap year so 29 days in
                                                        // February
                            } else {
                                maxDays = MAX_DAY - 3; // not a leap year so 28 days
                                                        // in February
                            }
                            break;
                        // April, June, Sept, Nov 30 day months
                        case 4:
                        case 6:
                        case 9:
                        case 11:
                            maxDays = MAX_DAY - 1;
                            break;
                    }
                    if (day >= 1 && day <= maxDays) {
                        Calendar cal = Calendar.getInstance();
                        cal.set(year, month - 1, day, hour, minute, second);
                        cal.set(Calendar.MILLISECOND, 0);
                        d = cal.getTime();
                    }
                }
            }
        }
        if (d == null) {
            throw new java.lang.IllegalArgumentException();
        }
        return d;
    }

    /**
     * @author lijie
     * @param Begin
     * @param end 传入开始时间 和 结束时间 格式如：2012-09-07
     * @return 返回Map 获取相隔多少年 get("YEAR")及为俩个时间年只差，月 天，类推 Key ： YEAR MONTH DAY 如果开始时间 晚于 结束时间 return null；
     */

    @SuppressWarnings({ "rawtypes", "unchecked" })
    public static Map getApartTime(String Begin, String end) {
        String[] temp = Begin.split("-");
        String[] temp2 = end.split("-");
        if (temp.length > 1 && temp2.length > 1) {
            Calendar ends = Calendar.getInstance();
            Calendar begin = Calendar.getInstance();

            begin.set(StringUtil.toInt(temp[0]), StringUtil.toInt(temp[1]), StringUtil.toInt(temp[2]));
            ends.set(StringUtil.toInt(temp2[0]), StringUtil.toInt(temp2[1]), StringUtil.toInt(temp2[2]));
            if (begin.compareTo(ends) < 0) {
                Map map = new HashMap();
                ends.add(Calendar.YEAR, -StringUtil.toInt(temp[0]));
                ends.add(Calendar.MONTH, -StringUtil.toInt(temp[1]));
                ends.add(Calendar.DATE, -StringUtil.toInt(temp[2]));
                map.put("YEAR", ends.get(Calendar.YEAR));
                map.put("MONTH", ends.get(Calendar.MONTH) + 1);
                map.put("DAY", ends.get(Calendar.DATE));
                return map;
            }
        }
        return null;
    }

    /**
     * 前/后?分钟
     * 
     * @param d
     * @param minute
     * @return
     */
    public static Date rollMinute(Date d, int minute) {
        return new Date(d.getTime() + minute * 60 * 1000);
    }

    /**
     * 前/后?天
     * 
     * @param d
     * @param day
     * @return
     */
    public static Date rollDay(Date d, int day) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(d);
        cal.add(Calendar.DAY_OF_MONTH, day);
        return cal.getTime();
    }

    /**
     * 前/后?月
     * 
     * @param d
     * @param mon
     * @return
     */
    public static Date rollMon(Date d, int mon) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(d);
        cal.add(Calendar.MONTH, mon);
        return cal.getTime();
    }

    /**
     * 前/后?年
     * 
     * @param d
     * @param year
     * @return
     */
    public static Date rollYear(Date d, int year) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(d);
        cal.add(Calendar.YEAR, year);
        return cal.getTime();
    }

    public static Date rollDate(Date d, int year, int mon, int day) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(d);
        cal.add(Calendar.YEAR, year);
        cal.add(Calendar.MONTH, mon);
        cal.add(Calendar.DAY_OF_MONTH, day);
        return cal.getTime();
    }

    /**
     * 获取当前时间-时间戳字符串
     * 
     * @return
     */
    public static String getNowTimeStr() {
        String str = Long.toString(System.currentTimeMillis() / 1000);
        return str;
    }

    /**
     * 获取当前时间-时间戳
     * 
     * @return
     */
    public static int getNowTime() {
        return Integer.parseInt(StringUtil.isNull(System.currentTimeMillis() / 1000));
    }

    /**
     * 将Date转换为时间戳
     * 
     * @param time
     * @return
     */
    public static String getTimeStr(Date time) {
        long date = time.getTime();
        String str = Long.toString(date / 1000);
        return str;
    }

    public static String getTimeStr(String dateStr, String format) {
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        Date date;
        try {
            date = sdf.parse(dateStr);
        } catch (ParseException e) {
            e.printStackTrace();
            return "";
        }
        String str = DateUtil.getTimeStr(date);
        return str;
    }

    public static String rollMonth(Date addTime, String time_limit) {
        Date t = DateUtil.rollDate(addTime, 0, StringUtil.toInt(time_limit), 0);
        return t.getTime() / 1000 + "";
    }

    public static String rollDay(Date addTime, String time_limit_day) {
        Date t = DateUtil.rollDate(addTime, 0, 0, StringUtil.toInt(time_limit_day));
        return t.getTime() / 1000 + "";
    }

    public static Date getIntegralTime() {
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.MILLISECOND, 0);
        return cal.getTime();
    }

    public static Date getLastIntegralTime() {
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, 23);
        cal.set(Calendar.SECOND, 59);
        cal.set(Calendar.MINUTE, 59);
        cal.set(Calendar.MILLISECOND, 0);
        return cal.getTime();
    }

    public static Date getLastSecIntegralTime(Date d) {
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(d.getTime());
        cal.set(Calendar.HOUR_OF_DAY, 23);
        cal.set(Calendar.SECOND, 59);
        cal.set(Calendar.MINUTE, 59);
        cal.set(Calendar.MILLISECOND, 0);
        return cal.getTime();
    }

    public static long getTime(String format) {
        long t = 0;
        if (StringUtil.isBlank(format))
            return t;
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date;
        try {
            date = sdf.parse(format);
            t = date.getTime() / 1000;
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return t;
    }

    // 获取本周日的日期
    @SuppressWarnings("unused")
    public static String getCurrentWeekday() {
        int weeks = 0;
        int mondayPlus = DateUtil.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;
    }

    // 获得当前日期与本周日相差的天数
    private 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
    @SuppressWarnings("unused")
    public static String getMondayOFWeek() {
        int weeks = 0;
        int mondayPlus = DateUtil.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;
    }

    // 获取当前月第一天：
    public static String getFirstDayOfMonth() {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Calendar c = Calendar.getInstance();
        c.add(Calendar.MONTH, 0);
        c.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天
        String first = format.format(c.getTime());
        return first;
    }

    // 获取当月最后一天
    public static String getLastDayOfMonth() {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Calendar ca = Calendar.getInstance();
        ca.set(Calendar.DAY_OF_MONTH, ca.getActualMaximum(Calendar.DAY_OF_MONTH));
        String last = format.format(ca.getTime());
        return last;
    }
    // 获取下月第一天：
    public static String getFirstDayOfNextMonth() {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Calendar c = Calendar.getInstance();
        c.add(Calendar.MONTH, 1);
        c.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天
        String first = format.format(c.getTime());
        return first;
    }
    
    

    /**
     * 日期月份处理
     * 
     * @param d 时间
     * @param month 相加的月份，正数则加，负数则减
     * @return
     */
    public static Date timeMonthManage(Date d, int month) {
        Calendar rightNow = Calendar.getInstance();
        rightNow.setTime(d);
        rightNow.add(Calendar.MONTH, month);
        return rightNow.getTime();
    }

    /**
     * 获取指定年月的最后一天
     * 
     * @param year_time 指定年
     * @param month_time 指定月
     * @return
     */
    public static Date monthLastDay(int year_time, int month_time) {
        Calendar cal = Calendar.getInstance();
        cal.set(year_time, month_time, 0, 23, 59, 59);
        return cal.getTime();
    }

    /**
     * 获取指定年月的第一天
     * 
     * @param year_time 指定年
     * @param month_time 指定月
     * @return
     */
    public static Date monthFirstDay(int year_time, int month_time) {
        Calendar cal = Calendar.getInstance();
        cal.set(year_time, month_time - 1, 1, 0, 0, 0);
        return cal.getTime();
    }

    /**
     * 获取指定时间月的第一天
     * 
     * @param d 指定时间，为空代表当前时间
     * @return
     */
    public static Date currMonthFirstDay(Date d) {
        Calendar cal = Calendar.getInstance();
        if (d != null)
            cal.setTime(d);
        cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.DAY_OF_MONTH));
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE), 0, 0, 0);
        return cal.getTime();
    }

    /**
     * 获取指定时间月的最后一天
     * 
     * @param d 指定时间，为空代表当前时间
     * @return
     */
    public static Date currMonthLastDay(Date d) {
        Calendar cal = Calendar.getInstance();
        if (d != null)
            cal.setTime(d);
        cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE), 23, 59, 59);
        return cal.getTime();
    }

    /**
     * 获取指定时间的年
     * 
     * @param date 指定时间
     * @return
     */
    public static int getTimeYear(Date date) {
        if (date == null)
            date = new Date();
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        return cal.get(Calendar.YEAR);
    }

    /**
     * 获取指定时间的月
     * 
     * @param date 指定时间
     * @return
     */
    public static int getTimeMonth(Date date) {
        if (date == null)
            date = new Date();
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        return cal.get(Calendar.MONTH) + 1;
    }

    /**
     * 获取指定时间的天
     * 
     * @param date 指定时间
     * @return
     */
    public static int getTimeDay(Date date) {
        if (date == null)
            date = new Date();
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        return cal.get(Calendar.DATE);
    }

    public static Date getFirstSecIntegralTime(Date d) {
        Calendar cal = Calendar.getInstance();
        cal.setTimeInMillis(d.getTime());
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.MILLISECOND, 0);
        cal.set(Calendar.DATE, 0);
        return cal.getTime();
    }

    /**
     * 获取指定时间天的结束时间
     * 
     * @param d
     * @return
     */
    public static Date getDayEndTime(long d) {
        Date day = null;
        if (d <= 0){
            day = new Date();
        } else{
            day = new Date(d * 1000);
        }
        Calendar cal = Calendar.getInstance();
        if (day != null){
            cal.setTimeInMillis(day.getTime());
        }
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE), 23, 59, 59);
        return cal.getTime();
    }

    /**
     * 获取指定时间天的开始时间
     * 
     * @param d
     * @return
     */
    public static Date getDayStartTime(long d) {
        Date day = null;
        if (d <= 0){
            day = new Date();
        } else {
            day = new Date(d * 1000);
        }
        Calendar cal = Calendar.getInstance();
        if (day != null) {
            cal.setTimeInMillis(day.getTime());
        }
        cal.set(cal.get(Calendar.YEAR), cal.get(Calendar.MONTH), cal.get(Calendar.DATE), 0, 0, 0);
        return cal.getTime();
    }

    /**
     * 获取19位的格式时间
     * 
     * @param dateStr
     * @return
     * @throws ParseException
     */
    public static Date getDateByFullDateStr(String dateStr) {
        if (StringUtil.isBlank(dateStr)) {
            return null;
        }
        
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            return sdf.parse(dateStr);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    /** 
     * 计算两个日期之间相差的天数 
     * @param date1 
     * @param date2 
     * @return  date1>date2时结果<0,  date1=date2时结果=0, date2>date1时结果>0
     */  
    public static int daysBetween(Date date1, Date date2){
        DateFormat sdf=new SimpleDateFormat("yyyyMMdd");
        Calendar cal = Calendar.getInstance();
        try {
            Date d1 = sdf.parse(DateUtil.dateStr7(date1));
            Date d2 = sdf.parse(DateUtil.dateStr7(date2));
            cal.setTime(d1);
            long time1 = cal.getTimeInMillis();
            cal.setTime(d2);
            long time2 = cal.getTimeInMillis();
            return Integer.parseInt(String.valueOf((time2 - time1) / 86400000L));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return 0;
    }
       
    /** 
     * 计算两个日期之间相差的小时数 
     * @param date1 
     * @param date2 
     * @return 
     */  
    public static int hoursBetween(Date date1, Date date2) {
     
        DateFormat sdf=new SimpleDateFormat("yyyyMMdd");
        Calendar cal = Calendar.getInstance();
        try {
            Date d1 = sdf.parse(DateUtil.dateStr7(date1));
            Date d2 = sdf.parse(DateUtil.dateStr7(date2));
            cal.setTime(d1);
            long time1 = cal.getTimeInMillis();
            cal.setTime(d2);
            long time2 = cal.getTimeInMillis();
            return Integer.parseInt(String.valueOf((time2 - time1) / 3600000L));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return 0;
    }
  
    
    /** 
     * 计算两个日期之间相差的小时数 
     * @param date1 
     * @param date2 
     * @return  date1>date2时结果<0,  date1=date2时结果=0, date2>date1时结果>0
     */  
    public static int hoursBetweenByDateStr(Date date1, Date date2) {
     
        DateFormat sdf=new SimpleDateFormat("yyyyMMddHH");
        Calendar cal = Calendar.getInstance();
        try {
            Date d1 = sdf.parse(DateUtil.dateStr13(date1));
            Date d2 = sdf.parse(DateUtil.dateStr13(date2));
            cal.setTime(d1);
            long time1 = cal.getTimeInMillis();
            cal.setTime(d2);
            long time2 = cal.getTimeInMillis();
            return Integer.parseInt(String.valueOf(((time2 - time1) / 3600000L)));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return 0;
    }
    
    /** 
     * 计算两个日期之间相差的分钟数 
     * @param date1 
     * @param date2 
     * @return  date1>date2时结果<0,  date1=date2时结果=0, date2>date1时结果>0
     */  
    public static int minuteBetweenByDateStr(Date date1, Date date2) {
     
        DateFormat sdf=new SimpleDateFormat("yyyyMMddHHmm");
        Calendar cal = Calendar.getInstance();
        try {
            Date d1 = sdf.parse(DateUtil.dateStr14(date1));
            Date d2 = sdf.parse(DateUtil.dateStr14(date2));
            cal.setTime(d1);
            long time1 = cal.getTimeInMillis();
            cal.setTime(d2);
            long time2 = cal.getTimeInMillis();
            return Integer.parseInt(String.valueOf(((time2 - time1) / 60000L)));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return 0;
    }
    
    /** 
     * 计算两个日期之间相差的秒数 
     * @param date1 
     * @param date2 
     * @return  date1>date2时结果<0,  date1=date2时结果=0, date2>date1时结果>0
     */  
    public static int secondBetweenByDateStr(Date date1, Date date2) {
     
        DateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmss");
        Calendar cal = Calendar.getInstance();
        try {
            Date d1 = sdf.parse(DateUtil.dateStr3(date1));
            Date d2 = sdf.parse(DateUtil.dateStr3(date2));
            cal.setTime(d1);
            long time1 = cal.getTimeInMillis();
            cal.setTime(d2);
            long time2 = cal.getTimeInMillis();
            return Integer.parseInt(String.valueOf(((time2 - time1) / 1000L)));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return 0;
    }
    
    /**
     * 得到两个时间相差的 天，小时，分钟，秒
     * 
     * @param startTime
     * @param endTime
     * @return
     */
    public static Map<String, Object> getTimeDifference(Date startTime,
            Date endTime) {
        if (startTime == null || endTime == null) {
            return null;
        }
        long nd = 1000 * 24 * 60 * 60;// 一天的毫秒数
        long nh = 1000 * 60 * 60; // 一小时的毫秒数
        long nm = 1000 * 60; // 一分钟的毫秒数
        long ns = 1000; // 一秒钟的毫秒数
        long diff;
        diff = endTime.getTime() - startTime.getTime();
        long day = diff / nd; // 天
        long hour = diff % nd / nh; // 小时
        long min = diff % nd % nh / nm; // 分钟
        long sec = diff % nd % nh % nm / ns;// 秒
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("day", day);
        map.put("hour", hour);
        map.put("min", min);
        map.put("sec", sec);
        return map;
    }
    
    
    public static Date getStartTimeToday(){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:00:00");
        try {
            return sdf.parse(sdf.format(DateUtil.getNow()));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }
    
    
    
    /**
     * yyMMddHHmm
     * 
     * @param date
     * @return
     */
    public static String dateStr9(Date date) {
        return dateStr(date, "yyMMddHHmm");
    }
    
    
    public static String getStartTimeOneDayStr(Date date){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd 00:00:00");
        return sdf.format(date);
    }
    
    
    public static Date getStartTimeByDate(Date date){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd 00:00:00");
        try {
            return sdf.parse(sdf.format(date));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }
    
    public static Date getDateByStrTime(String dateStr,String format) {
        SimpleDateFormat sdf = new SimpleDateFormat(format);
        try {
            return sdf.parse(dateStr);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }
    
    
    public static int secondsBetween(Date startTime,Date endTime){
        
        System.out.println("当前时间："+dateStr4(startTime));
        System.out.println("当天结束时间："+dateStr4(endTime));
        
        long diff=endTime.getTime()-startTime.getTime();
        
        long diffSeconds = diff / 1000 % 60;
        long diffMinutes = diff / (60 * 1000) % 60;
        long diffHours = diff / (60 * 60 * 1000) % 24;
        long diffDays = diff / (24 * 60 * 60 * 1000);
        
        System.out.println("两个时间相差：");
        System.out.println(diffDays + " 天, ");
        System.out.println(diffHours + " 小时, ");
        System.out.println(diffMinutes + " 分钟, ");
        System.out.println(diffSeconds + " 秒.");
        
        int totalSecons= Integer.valueOf(String.valueOf(diff/1000));
        System.out.println("两个时间相差总秒数："+totalSecons);
        return totalSecons;
    }
    
    
    public static void main(String[] args) {
        
//        Double rewardFee=BigDecimalUtil.sub(1, 0.2);
//        
//        System.out.println("正常比列:" +rewardFee);
//        
//        Double taxMoney=BigDecimalUtil.roundup(BigDecimalUtil.div((36800-1000.00),rewardFee ),0);
//        
//        System.out.println("扣税部分的总额:" +taxMoney);
//        
//        System.out.println("总额:" +BigDecimalUtil.add(taxMoney,1000)); 
//        
//        if(secondBetweenByDateStr(DateUtil.getDateByStrTime("20180110135900","yyyyMMddHHmmss"),DateUtil.getNow())>=0){
//            System.out.println(secondBetweenByDateStr(DateUtil.getDateByStrTime("20180110135900","yyyyMMddHHmmss"),DateUtil.getNow()));
//            System.out.println("活动已开始" );
//        }else{
//            System.out.println("活动未开始:" );
//        }
//        
//        
//        Date time=DateUtil.getNow();
//        if(DateUtil.daysBetween(DateUtil.getDateByStrTime("20170606","yyyyMMdd"), time) <0){
//            System.out.println("6号之前" );
//        }else{
//            System.out.println("6号之后" );
//        }
        
        
//        Date date=getXinLiCaiAutoInvestTime(DateUtil.getDateByStrTime("20160229","yyyyMMdd"));
//        
//        System.out.println("返回日期:"+dateStr(date, "yyyyMMdd")  );
        
//        System.out.println(dateStr9(new Date()));
//        int value=Integer.valueOf(1608221702);
//        System.out.println("intValue: "+value);
        
//        System.out.println(DateUtil.getStartTimeOneDayStr(DateUtil.rollDay(DateUtil.getNow(), -1)));
//        
//        System.out.println(DateUtil.getStartTimeOneDayStr(DateUtil.rollDay(DateUtil.getNow(), 1)));
//        
//        System.out.println(DateUtil.dateStr2(DateUtil.rollDay(DateUtil.getNow(), -1)));
//        
//        System.out.println(DateUtil.dateStr2(DateUtil.getNow()));
        
        
//        System.out.println(DateUtil.getStartTimeOneDayStr(DateUtil.rollDay(DateUtil.getNow(), 0)));
//        
//        
//        System.out.print(DateUtil.getTime(DateUtil.getNow())+"\n");
//        System.out.print(System.currentTimeMillis());
        
    //    System.out.println("当前时间相差"+DateUtil.daysBetween(DateUtil.getDateByStrTime("20161008","yyyyMMdd"), DateUtil.getDateByStrTime("20161031","yyyyMMdd")));
        
        
//        Date closeTime1 = DateUtil.getDateByFullDateStr(DateUtil.dateStr2(new Date())+" "+"00:06:00");
//        Date closeTime2 = DateUtil.getDateByFullDateStr(DateUtil.dateStr2(new Date())+" "+"00:06:00");
//        
//        System.out.println("closeTime1 : "+DateUtil.dateStr4(closeTime1));
//        System.out.println("closeTime2 : "+DateUtil.dateStr4(closeTime2));
//        
//        if(DateUtil.getNow().compareTo(closeTime1)>=0&&DateUtil.getNow().compareTo(closeTime2)<=0){
//            System.out.println("当前时间为冻结时间不接受任何交易!");
//        }else{
//            System.out.println(DateUtil.dateStr4(DateUtil.getNow()));
//        }
//        
//        
//        
//        int days=DateUtil.daysBetween(DateUtil.getDateByStrTime("20161117000000","yyyyMMddHHmmss"), DateUtil.getNow());
//        
//        System.out.println("当前相差天数为 :"+days);
//        
//        
//        System.out.println("当前时间比较方法1为  : " + compare_date_1(DateUtil.dateStr2(new Date())+" "+"00:06:00", "2016-11-17 00:00:19"));
//        
//        System.out.println("当前时间比较方法1为  : " + compare_date_2(DateUtil.dateStr2(new Date())+" "+"00:06:00", "2016-11-17 00:00:19"));
//        
        
//        System.out.println(DateUtil.rollDay(DateUtil.getNow(), -1));
//        
//        System.out.println(DateUtil.getDateByStrTime("20161123", "yyyyMMdd").compareTo(DateUtil.getDateByStrTime("20161123", "yyyyMMdd")));
//        
//        
//        int abc=DateUtil.daysBetween(DateUtil.getDateByStrTime("20170429","yyyyMMdd"), DateUtil.getDateByStrTime("20170429","yyyyMMdd"));
//        System.out.println("abc:"+abc);
//        
//        System.out.println("明天起始时间 : "+DateUtil.getStartTimeByDate(DateUtil.rollDay(DateUtil.getNow(), 1)));
//        
//        System.out.println("明天起始时间Str:"+DateUtil.getStartTimeOneDayStr(DateUtil.rollDay(DateUtil.getNow(), 1)));
//        System.out.println(getLastMonthLastDay());
//        
//        System.out.println(dateStr4(new Date(1506575450093L)));
//        
//        System.out.println(DateUtil.rollMon(DateUtil.getNow(), -6).getTime());
//        
//        int abc=DateUtil.daysBetween(DateUtil.getDateByStrTime("2017-09-07 04:30:06","yyyy-MM-dd HH:mm:ss"), DateUtil.getDateByStrTime("2017-09-28 18:00:00","yyyy-MM-dd HH:mm:ss"));
//        System.out.println("abc:"+abc);
//        
//        
//        int bcd = DateUtil.compare_date_2("2017-09-07 04:30:06","2017-09-28 18:00:00");
//        
//        System.out.println("bcd"+bcd);
//        
//        System.out.println("时间 : "+System.currentTimeMillis());
        
    }
    
    
     /** 
     * 给当前时间加一天
     * @param date1 
     * @return 
     */  
    public static Date getAddOneDay(Date d) {
        Calendar cal = new GregorianCalendar();
        cal.setTime(d);
        cal.add(Calendar.DATE, 1);
        return cal.getTime();
    }
    
    
     /** 
     * 给当前时间加一年
     * @param date1 
     * @return 
     */  
    public static Date getAddOneYear(Date d) {
        Calendar cal = new GregorianCalendar();
        cal.setTime(d);
        cal.add(Calendar.YEAR, 1);
        return cal.getTime();
    }
    
    /**
     * 比较时间
     * @param strDate1  时间1
     * @param strDate2  时间2
     * @return 0:相等, <0:strDate1小于strDate2, >0:strDate1大于strDate2
     */
    public static int compare_date_1(String strDate1, String strDate2) {
        int result=0;
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        try {
            java.util.Calendar c1=java.util.Calendar.getInstance();
            java.util.Calendar c2=java.util.Calendar.getInstance();
            c1.setTime(df.parse(strDate1));
            c2.setTime(df.parse(strDate2));
            result=c1.compareTo(c2);
            if(result==0){
                System.out.println("c1相等c2");
            }else if(result<0){
                System.out.println("c1小于c2");
            }else{
                System.out.println("c1大于c2");
            }
        } catch (Exception exception) {
            exception.printStackTrace();
        }
        return result;
     }
    
    
    
    
    
    
    /**
     * 比较时间
     * @param strDate1  时间1
     * @param strDate2  时间2
     * @return 0:相等, <0:strDate1小于strDate2, >0:strDate1大于strDate2
     */
    public static int compare_date_2(String strDate1, String strDate2) {
        int result=0;
        DateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
        try {
            Date dt1 = df.parse(strDate1);
            Date dt2 = df.parse(strDate2);
            if(dt1.getTime()>dt2.getTime()){
                result=1;
            }else if(dt1.getTime()<dt2.getTime()){
                result=-1;
            }else{
                result=0;
            }
        } catch (Exception exception) {
            exception.printStackTrace();
        }
        return result;
     }
    
    
    
     /** 
     * 获取薪理财自动转入的时间
     * @param date  最后一期转入时间
     * @return 
     */  
    public static Date getXinLiCaiAutoInvestTime(Date date) {
        Calendar cal = new GregorianCalendar();
        cal.setTime(date);
        
        int year=Calendar.YEAR;   //年
        int month=Calendar.MONTH; //月
        int day=Calendar.DATE;    //天
        
        
        Date returnDate=null;
        
        if(month==1 || month==3 || month==5 || month==8 || month==10){
            if(month==1){
                if(day>=28){
                    if((year%4==0&&year%100!=0)||year%400==0){
                         returnDate=getDateByStrTime(dateStr(date,"yyyyMM")+29, "yyyyMMdd") ;
                     }else{
                         returnDate=getDateByStrTime(dateStr(date,"yyyyMM")+28, "yyyyMMdd") ;
                     }
                }
            }else{
                if(day>30 ){
                    returnDate=getDateByStrTime(dateStr(date,"yyyyMM")+30, "yyyyMMdd") ;
                }else{
                    returnDate= rollMon(date, 1);
                }
            }
        }else{
            returnDate= rollMon(date, 1);
        }
        
        return returnDate;
    }
    /**
     * 获取上一个月的第一天
     * @return
     */
    public static String getLastMonthFirstDay(){
        SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
        Calendar calendar=Calendar.getInstance();
        calendar.add(Calendar.MONTH, -1);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        return sdf.format(calendar.getTime())+" 00:00:00";
    }
    /**
     * 获取上一个月的最后一天
     * @return
     */
    public static String getLastMonthLastDay(){
        SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
        Calendar calendar=Calendar.getInstance();
        int month=calendar.get(Calendar.MONTH);
        calendar.set(Calendar.MONTH, month-1);
        calendar.set(Calendar.DAY_OF_MONTH, calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
        return sdf.format(calendar.getTime())+" 23:59:59";
    }
    /**
     * 比较两个时间是否为同一天
     * @param date1
     * @param date2
     * @return
     */
    public static boolean isSameDay(Date date1, Date date2) {  
        Calendar calendar = Calendar.getInstance();  
        calendar.setTime(date1);  
        int year1 = calendar.get(Calendar.YEAR);  
        int day1 = calendar.get(Calendar.DAY_OF_YEAR);  
      
        calendar.setTime(date2);  
        int year2 = calendar.get(Calendar.YEAR);  
        int day2 = calendar.get(Calendar.DAY_OF_YEAR);  
      
        if ((year1 == year2) && (day1 == day2)) {  
            return true;  
        }  
        return false;  
    }
    
    
    public static Date getDateByDateAndDateFormate(Date date,String dateFormat){
        SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
        try {
            return sdf.parse(sdf.format(date));
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return null;
    }
    
    public static Date MongoDbTimeToDate(Object mongodbTime) {
        SimpleDateFormat format1 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'");
        Date returnD=null;
        try {
            if (mongodbTime instanceof Date) {
                Date d = (Date) mongodbTime;
                returnD= d;
            } else {
                returnD= format1.parse(mongodbTime.toString());
            }
        } catch (ParseException e) {
            try {
                returnD=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(mongodbTime.toString());
            } catch (ParseException e1) {
                try {
                    returnD= new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'").parse(mongodbTime.toString());
                } catch (ParseException e2) {
                    e2.printStackTrace();
                }
            }
        }
        return returnD;
    }
    
    /**
     * 字符串日期转日期格式
     * @param dateStr
     * @return
     */
    public static Date dateStrToDate(String dateStr, String dateFormat) {
        if (StringUtil.isBlank(dateStr)) {
            return null;
        }
        try {
            SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
            return sdf.parse(dateStr);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    /**
     * 获取指定日期的结束时间
     * @param date
     * @return
     */
    public static String getEndTimeOneDayStr(Date date){
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd 23:59:59");
        return sdf.format(date);
    }
    
    /**
     * 获取19位的格式时间
     * 
     * @param dateStr
     * @return
     * @throws ParseException
     */
    public static Date getDateByYMDDateStr(String dateStr) {
        if (StringUtil.isBlank(dateStr)) {
            return null;
        }
        
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            return sdf.parse(dateStr);
        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }
    }
    
    public static long getMilliseconds(String format) {
        long t = 0;
        if (StringUtil.isBlank(format))
            return t;
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date date;
        try {
            date = sdf.parse(format);
            t = date.getTime();
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return t;
    }
}
    

 

来源：oschina

链接：https://my.oschina.net/u/4324343/blog/4023561