DateUtil.java

package cn.wisenergy.chnmuseum.party.common.util;

import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.regex.Pattern;

public class DateUtil {

    // 格式：年－月－日 小时：分钟：秒
    public static final String FORMAT_ONE = "yyyy-MM-dd HH:mm:ss";

    public static final String FORMAT_T = "yyyy-MM-ddTHH:mm:ss";

    // 格式：年－月－日 小时：分钟
    public static final String FORMAT_TWO = "yyyy-MM-dd HH:mm";

    // 格式：年月日 小时分钟秒
    public static final String FORMAT_THREE = "yyyyMMdd-HHmmss";

    // 格式：年－月－日
    public static final String LONG_DATE_FORMAT = "yyyy-MM-dd";

    // 格式：月－日
    public static final String SHORT_DATE_FORMAT = "MM-dd";

    // 格式：小时：分钟：秒
    public static final String LONG_TIME_FORMAT = "HH:mm:ss";

    // 格式：年-月
    public static final String MONTG_DATE_FORMAT = "yyyy-MM";

    private static final DateFormat df = new SimpleDateFormat(FORMAT_ONE);

    // 年的加减
    public static final int SUB_YEAR = Calendar.YEAR;

    // 月加减
    public static final int SUB_MONTH = Calendar.MONTH;

    // 天的加减
    public static final int SUB_DAY = Calendar.DATE;

    // 小时的加减
    public static final int SUB_HOUR = Calendar.HOUR;

    // 分钟的加减
    public static final int SUB_MINUTE = Calendar.MINUTE;

    // 秒的加减
    public static final int SUB_SECOND = Calendar.SECOND;

    static final String dayNames[] = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};

    public static long dateToLong(String datetime) throws ParseException {
        return df.parse(datetime).getTime();
    }

    /**
     * 获取指定年月的最大天数
     *
     * @param year
     * @param month
     * @return
     */
    public static int getLastDay(int year, int month) {
        int day = 1;
        Calendar cal = Calendar.getInstance();
        cal.set(year, month - 1, day);
        int last = cal.getActualMaximum(Calendar.DATE);
        System.out.println(last);
        return last;
    }

    /**
     * 得到指定日期所在月份天数的集合
     *
     * @param date
     * @return
     */
    public static int[] getMonthDays(String date) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.YEAR, Integer.parseInt(date.substring(0, 4)));
        calendar.set(Calendar.MONTH, Integer.parseInt(date.substring(5, 7)) - 1);
        int maxDay = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
        int[] days = new int[maxDay];
        for (int i = 1; i <= maxDay; i++) {
            days[i - 1] = i;
        }
        return days;
    }

    /**
     * 获取一年的所有月
     */
    public static int[] getMonths() {
        int months[] = {};
        for (int i = 0; i < 12; i++) {
            months[i] = i + 1;
        }
        return months;
    }

    /**
     * 获取当月的天数
     */
    public static int getCurrentMonthDay() {
        Calendar a = Calendar.getInstance();
        a.set(Calendar.DATE, 1);
        a.roll(Calendar.DATE, -1);
        int maxDate = a.get(Calendar.DATE);
        return maxDate;
    }

    /**
     * 根据年 月 获取对应的月份 天数
     */
    public static int getDaysByYearMonth(int year, int month) {
        Calendar a = Calendar.getInstance();
        a.set(Calendar.YEAR, year);
        a.set(Calendar.MONTH, month - 1);
        a.set(Calendar.DATE, 1);
        a.roll(Calendar.DATE, -1);
        int maxDate = a.get(Calendar.DATE);
        return maxDate;
    }

    /**
     * 根据日期 找到对应日期的 星期
     */
    public static String getDayOfWeekByDate(String date) {
        String dayOfweek = "-1";
        try {
            SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
            Date myDate = myFormatter.parse(date);
            SimpleDateFormat formatter = new SimpleDateFormat("E");
            String str = formatter.format(myDate);
            dayOfweek = str;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dayOfweek;
    }

    public DateUtil() {
    }

    /**
     * 把符合日期格式的字符串转换为日期类型
     *
     * @param dateStr
     * @return
     */
    public static Date stringtoDate(String dateStr, String format) {
        Date d = null;
        SimpleDateFormat formater = new SimpleDateFormat(format);
        try {
            formater.setLenient(false);
            d = formater.parse(dateStr);
        } catch (Exception e) {
            // log.error(e);
            d = null;
        }
        return d;
    }

    /**
     * 把符合日期格式的字符串转换为日期类型
     */
    public static Date stringtoDate(String dateStr, String format, ParsePosition pos) {
        Date d = null;
        SimpleDateFormat formater = new SimpleDateFormat(format);
        try {
            formater.setLenient(false);
            d = formater.parse(dateStr, pos);
        } catch (Exception e) {
            d = null;
        }
        return d;
    }

    /**
     * 把日期转换为字符串
     *
     * @param date
     * @return
     */
    public static String dateToString(Date date, String format) {
        String result = "";
        SimpleDateFormat formater = new SimpleDateFormat(format);
        try {
            result = formater.format(date);
        } catch (Exception e) {
            // log.error(e);
        }
        return result;
    }

    /**
     * 获取当前时间的指定格式
     *
     * @param format
     * @return
     */
    public static String getCurrDate(String format) {
        return dateToString(new Date(), format);
    }

    /**
     * @param dateStr
     * @param amount
     * @return
     */
    public static String dateSub(int dateKind, String dateStr, int amount) {
        Date date = stringtoDate(dateStr, FORMAT_ONE);
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(dateKind, amount);
        return dateToString(calendar.getTime(), FORMAT_ONE);
    }

    /**
     * 两个日期相减
     *
     * @param firstTime
     * @param secTime
     * @return 相减得到的秒数
     */
    public static long timeSub(String firstTime, String secTime) {
        long first = stringtoDate(firstTime, FORMAT_ONE).getTime();
        long second = stringtoDate(secTime, FORMAT_ONE).getTime();
        return (second - first) / 1000;
    }

    /**
     * 获得某月的天数
     *
     * @param year  int
     * @param month int
     * @return int
     */
    public static int getDaysOfMonth(String year, String month) {
        int days = 0;
        if (month.equals("1") || month.equals("3") || month.equals("5") || month.equals("7") || month.equals("8")
                || month.equals("10") || month.equals("12")) {
            days = 31;
        } else if (month.equals("4") || month.equals("6") || month.equals("9") || month.equals("11")) {
            days = 30;
        } else {
            if ((Integer.parseInt(year) % 4 == 0 && Integer.parseInt(year) % 100 != 0)
                    || Integer.parseInt(year) % 400 == 0) {
                days = 29;
            } else {
                days = 28;
            }
        }

        return days;
    }

    /**
     * 获取某年某月的天数
     *
     * @param year  int
     * @param month int 月份[1-12]
     * @return int
     */
    public static int getDaysOfMonth(int year, int month) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(year, month - 1, 1);
        return calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
    }

    /**
     * 获得当前日期
     *
     * @return int
     */
    public static int getToday() {
        Calendar calendar = Calendar.getInstance();
        return calendar.get(Calendar.DATE);
    }

    /**
     * 获得当前月份
     *
     * @return int
     */
    public static int getToMonth() {
        Calendar calendar = Calendar.getInstance();
        return calendar.get(Calendar.MONTH) + 1;
    }

    /**
     * 获得当前年份
     *
     * @return int
     */
    public static int getToYear() {
        Calendar calendar = Calendar.getInstance();
        return calendar.get(Calendar.YEAR);
    }

    /**
     * 返回日期的天
     *
     * @param date Date
     * @return int
     */
    public static int getDay(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        return calendar.get(Calendar.DATE);
    }

    /**
     * 返回日期的年
     *
     * @param date Date
     * @return int
     */
    public static int getYear(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        return calendar.get(Calendar.YEAR);
    }

    /**
     * 返回日期的月份，1-12
     *
     * @param date Date
     * @return int
     */
    public static int getMonth(Date date) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        return calendar.get(Calendar.MONTH) + 1;
    }

    /**
     * 计算两个日期相差的天数，如果date2 > date1 返回正数，否则返回负数
     *
     * @param date1 Date
     * @param date2 Date
     * @return long
     */
    public static long dayDiff(Date date1, Date date2) {
        return (date2.getTime() - date1.getTime()) / 86400000;
    }

    /**
     * 比较两个日期的年差
     *
     * @param before
     * @param after
     * @return
     */
    public static int yearDiff(String before, String after) {
        Date beforeDay = stringtoDate(before, LONG_DATE_FORMAT);
        Date afterDay = stringtoDate(after, LONG_DATE_FORMAT);
        return getYear(afterDay) - getYear(beforeDay);
    }

    /**
     * 比较指定日期与当前日期的差
     *
     * @param after
     * @return
     */
    public static int yearDiffCurr(String after) {
        Date beforeDay = new Date();
        Date afterDay = stringtoDate(after, LONG_DATE_FORMAT);
        return getYear(beforeDay) - getYear(afterDay);
    }

    /**
     * 比较指定日期与当前日期的差
     *
     * @param before
     * @return
     * @author chenyz
     */
    public static long dayDiffCurr(String before) {
        Date currDate = DateUtil.stringtoDate(currDay(), LONG_DATE_FORMAT);
        Date beforeDate = stringtoDate(before, LONG_DATE_FORMAT);
        return (currDate.getTime() - beforeDate.getTime()) / 86400000;

    }

    /**
     * 获取每月的第一周
     *
     * @param year
     * @param month
     * @return
     * @author chenyz
     */
    public static int getFirstWeekdayOfMonth(int year, int month) {
        Calendar c = Calendar.getInstance();
        c.setFirstDayOfWeek(Calendar.SATURDAY); // 星期天为第一天
        c.set(year, month - 1, 1);
        return c.get(Calendar.DAY_OF_WEEK);
    }

    /**
     * 获取每月的最后一周
     *
     * @param year
     * @param month
     * @return
     * @author chenyz
     */
    public static int getLastWeekdayOfMonth(int year, int month) {
        Calendar c = Calendar.getInstance();
        c.setFirstDayOfWeek(Calendar.SATURDAY); // 星期天为第一天
        c.set(year, month - 1, getDaysOfMonth(year, month));
        return c.get(Calendar.DAY_OF_WEEK);
    }

    /**
     * 获得当前日期字符串，格式"yyyy-MM-dd HH:mm:ss"
     *
     * @return
     */
    public static String getNow() {
        Calendar today = Calendar.getInstance();
        return dateToString(today.getTime(), FORMAT_ONE);
    }

    public static String getDateTime() {
        Calendar today = Calendar.getInstance();
        String date = dateToString(today.getTime(), LONG_DATE_FORMAT);
        String time = dateToString(today.getTime(), LONG_TIME_FORMAT);
        return date + "T" + time + "Z";
    }

    /**
     * 根据生日获取星座
     *
     * @param birth YYYY-mm-dd
     * @return
     */
    public static String getAstro(String birth) {
        if (!isDate(birth)) {
            birth = "2000" + birth;
        }
        if (!isDate(birth)) {
            return "";
        }
        int month = Integer.parseInt(birth.substring(birth.indexOf("-") + 1, birth.lastIndexOf("-")));
        int day = Integer.parseInt(birth.substring(birth.lastIndexOf("-") + 1));
        String s = "魔羯水瓶双鱼牡羊金牛双子巨蟹狮子处女天秤天蝎射手魔羯";
        int[] arr = {20, 19, 21, 21, 21, 22, 23, 23, 23, 23, 22, 22};
        int start = month * 2 - (day < arr[month - 1] ? 2 : 0);
        return s.substring(start, start + 2) + "座";
    }

    /**
     * 判断日期是否有效,包括闰年的情况
     *
     * @param date YYYY-mm-dd
     * @return
     */
    public static boolean isDate(String date) {
        StringBuffer reg = new StringBuffer("^((\\d{2}(([02468][048])|([13579][26]))-?((((0?");
        reg.append("[13578])|(1[02]))-?((0?[1-9])|([1-2][0-9])|(3[01])))");
        reg.append("|(((0?[469])|(11))-?((0?[1-9])|([1-2][0-9])|(30)))|");
        reg.append("(0?2-?((0?[1-9])|([1-2][0-9])))))|(\\d{2}(([02468][12");
        reg.append("35679])|([13579][01345789]))-?((((0?[13578])|(1[02]))");
        reg.append("-?((0?[1-9])|([1-2][0-9])|(3[01])))|(((0?[469])|(11))");
        reg.append("-?((0?[1-9])|([1-2][0-9])|(30)))|(0?2-?((0?[");
        reg.append("1-9])|(1[0-9])|(2[0-8]))))))");
        Pattern p = Pattern.compile(reg.toString());
        return p.matcher(date).matches();
    }

    /**
     * 取得指定日期过 months 月后的日期 (当 months 为负数表示指定月之前);
     *
     * @param date   日期 为null时表示当天
     * @param months 相加(相减)的月数
     */
    public static Date nextMonth(Date date, int months) {
        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        cal.add(Calendar.MONTH, months);
        return cal.getTime();
    }

    /**
     * 取得指定日期过 day 天后的日期 (当 day 为负数表示指日期之前);
     */
    public static Date nextDay(Date date, int day) {
        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        cal.add(Calendar.DAY_OF_YEAR, day);
        return cal.getTime();
    }

    /**
     * 取得距离今天 day 日的日期
     *
     * @param day
     * @param format
     * @return
     * @author chenyz
     */
    public static String nextDay(int day, String format) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(new Date());
        cal.add(Calendar.DAY_OF_YEAR, day);
        return dateToString(cal.getTime(), format);
    }

    /**
     * 取得指定日期过 day 周后的日期 (当 day 为负数表示指定月之前)
     *
     * @param date 日期 为null时表示当天
     */
    public static Date nextWeek(Date date, int week) {
        Calendar cal = Calendar.getInstance();
        if (date != null) {
            cal.setTime(date);
        }
        cal.add(Calendar.WEEK_OF_MONTH, week);
        return cal.getTime();
    }

    /**
     * 获取当前的日期(yyyy-MM-dd)
     */
    public static String currDay() {
        return DateUtil.dateToString(new Date(), DateUtil.LONG_DATE_FORMAT);
    }

    /**
     * 获取昨天的日期
     *
     * @return
     */
    public static String befoDay() {
        return befoDay(DateUtil.LONG_DATE_FORMAT);
    }

    /**
     * 根据时间类型获取昨天的日期
     *
     * @param format
     * @return
     * @author chenyz
     */
    public static String befoDay(String format) {
        return DateUtil.dateToString(DateUtil.nextDay(new Date(), -1), format);
    }

    /**
     * 获取明天的日期
     */
    public static String afterDay() {
        return DateUtil.dateToString(DateUtil.nextDay(new Date(), 1), DateUtil.LONG_DATE_FORMAT);
    }

    /**
     * 取得当前时间距离1900/1/1的天数
     *
     * @return
     */
    public static int getDayNum() {
        int daynum = 0;
        GregorianCalendar gd = new GregorianCalendar();
        Date dt = gd.getTime();
        GregorianCalendar gd1 = new GregorianCalendar(1900, 1, 1);
        Date dt1 = gd1.getTime();
        daynum = (int) ((dt.getTime() - dt1.getTime()) / (24 * 60 * 60 * 1000));
        return daynum;
    }

    /**
     * getDayNum的逆方法(用于处理Excel取出的日期格式数据等)
     *
     * @param day
     * @return
     */
    public static Date getDateByNum(int day) {
        GregorianCalendar gd = new GregorianCalendar(1900, 1, 1);
        Date date = gd.getTime();
        date = nextDay(date, day);
        return date;
    }

    /**
     * 获取本月第一天
     *
     * @param format
     * @return
     */
    public static String getFirstDayOfMonth(String format) {
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.DATE, 1);
        return dateToString(cal.getTime(), format);
    }

    /**
     * 获取本月最后一天
     *
     * @param format
     * @return
     */
    public static String getLastDayOfMonth(String format) {
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.DATE, 1);
        cal.add(Calendar.MONTH, 1);
        cal.add(Calendar.DATE, -1);
        return dateToString(cal.getTime(), format);
    }

    public static int getWeekByDate(String day) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        Date date;
        try {
            date = format.parse(day);
            Calendar calendar = Calendar.getInstance();
            calendar.setFirstDayOfWeek(Calendar.MONDAY);
            calendar.setTime(date);
            return calendar.get(Calendar.WEEK_OF_YEAR);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return 0;
    }

    public static String getDate(String day) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd");
        SimpleDateFormat format1 = new SimpleDateFormat(FORMAT_ONE);
        Date date;
        try {
            date = format.parse(day);
            return format1.format(date);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return day;
    }

    public static String getDate1(String day) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        SimpleDateFormat format1 = new SimpleDateFormat(LONG_DATE_FORMAT);
        Date date;
        try {
            date = format.parse(day);
            return format1.format(date);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return day;
    }

    public static String getDate2(String day) {
        SimpleDateFormat format = new SimpleDateFormat("yyyy/MM/dd");
        SimpleDateFormat format1 = new SimpleDateFormat(FORMAT_ONE);
        Date date;
        try {
            date = format.parse(day);
            return format1.format(date);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return day;
    }

    public static String getDateOfMaxDay(String day) {
        SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy");
        SimpleDateFormat format1 = new SimpleDateFormat(LONG_DATE_FORMAT);
        Date date;
        try {
            date = format.parse(day);
            return format1.format(date) + " 23:59:59";
        } catch (ParseException e) {
            e.printStackTrace();
        }
        return day;
    }

    static SimpleDateFormat format = new SimpleDateFormat(LONG_DATE_FORMAT);

    public static String getCurrentDate() {
        return format.format(new Date()) + " 23:59:59";
    }

    public static String getFullDate(Timestamp day) {
        return format.format(day);
    }

    /**
     * 获取过去第几天的日期
     *
     * @param past
     * @return
     */
    public static String getPastDate(int past) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) - past);
        Date today = calendar.getTime();
        SimpleDateFormat format = new SimpleDateFormat(LONG_DATE_FORMAT);
        return format.format(today);
    }

    /**
     * 获取过去第几天的日期
     *
     * @param past
     * @return
     */
    public static String getPastDate1(int past) {
        Calendar calendar = Calendar.getInstance();
        calendar.set(Calendar.DAY_OF_YEAR, calendar.get(Calendar.DAY_OF_YEAR) - past);
        Date today = calendar.getTime();
        SimpleDateFormat format = new SimpleDateFormat(FORMAT_ONE);
        return format.format(today);
    }

    /**
     * 当前日期获得本月的所有日期
     *
     * @param date
     * @return
     */
    public static List<String> getAllTheDateOftheMonth(Date date) {
        List<String> list = new ArrayList<String>();
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.set(Calendar.DATE, 1);
        int month = cal.get(Calendar.MONTH);
        while (cal.get(Calendar.MONTH) == month) {
            list.add(df.format(cal.getTime()));
            cal.add(Calendar.DATE, 1);
        }
        return list;
    }

    /**
     * 取得指定日期过 day 天后的日期 (当 day 为负数表示指日期之前);
     *
     * @param millis 日期 为null时表示当天
     * @param day    相加(相减)的月数
     */
    public static long nextDay(Long millis, int day) {
        Calendar cal = Calendar.getInstance();
        if (millis != null) {
            cal.setTimeInMillis(millis);
        }
        cal.add(Calendar.DAY_OF_YEAR, day);
        return cal.getTimeInMillis();
    }

    /**
     * 将Date日期转换为 yyyyMMdd
     *
     * @return 字符串 yyyyMMdd
     */
    public static String dateToString(Date date) {
//		Date currentTime = new Date();
        SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMdd");
        String dateString = formatter.format(date);
        return dateString;
    }

    /**
     * 获取两个日期之间的日期
     *
     * @param start 开始日期
     * @param end   结束日期
     * @param type  日期类型
     * @return 日期集合
     */
    public static List<Date> getBetweenDates(Date start, Date end, String type) {
        List<Date> result = new ArrayList<Date>();
        Calendar tempStart = Calendar.getInstance();
        tempStart.setTime(start);
        Calendar tempEnd = Calendar.getInstance();
        tempEnd.setTime(end);
        if ("year".equals(type)) {
            tempEnd.add(Calendar.YEAR, 1);
        } else if ("month".equals(type)) {
            tempEnd.add(Calendar.MONTH, 1);
        } else if ("day".equals(type)) {
            tempEnd.add(Calendar.DAY_OF_YEAR, 1);
        }
        while (tempStart.before(tempEnd)) {
            result.add(tempStart.getTime());
            if ("year".equals(type)) {
                tempStart.add(Calendar.YEAR, 1);
            } else if ("month".equals(type)) {
                tempStart.add(Calendar.MONTH, 1);
            } else if ("day".equals(type)) {
                tempStart.add(Calendar.DAY_OF_YEAR, 1);
            }
        }
        return result;
    }

    /**
     * @param date
     * @param number 想要获取的日期与传入日期的差值 比如想要获取传入日期前四天的日期 day=-4即可
     * @param type
     * @return
     */
    public static Date getSomeDay(Date date, int number, String type) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        if ("year".equals(type)) {
            calendar.add(Calendar.YEAR, number);
        } else if ("month".equals(type)) {
            calendar.add(Calendar.MONTH, number);
        } else if ("day".equals(type)) {
            calendar.add(Calendar.DATE, number);
        }
        return calendar.getTime();
    }
}