Java常用时间工具类总结(珍藏版)

package com.zyq.util.date;
 
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
 

public class DateUtils {
 
    
    public static final int WEEK_DAYS = 7;
    
    public static final int YEAR_MONTHS = 12;
    
    public static final int DAY_HOURS = 24;
    
    public static final int HOUR_MINUTES = 60;
    
    public static final int DAY_MINUTES = 1440;
    
    public static final int MINUTE_SECONDS = 60;
    
    public static final int HOUR_SECONDS = 3600;
    
    public static final int DAY_SECONDS = 86400;
    
    public static final long SECOND_MILLISECONDS = 1000L;
    
    public static final long MINUTE_MILLISECONDS = 60000L;
    
    public static final long HOUR_MILLISECONDS = 3600000L;
    
    public static final long DAY_MILLISECONDS = 86400000L;
    
    public static final int WEEK_1_MONDAY = 1;
    
    public static final int WEEK_2_TUESDAY = 2;
    
    public static final int WEEK_3_WEDNESDAY = 3;
    
    public static final int WEEK_4_THURSDAY = 4;
    
    public static final int WEEK_5_FRIDAY = 5;
    
    public static final int WEEK_6_SATURDAY = 6;
    
    public static final int WEEK_7_SUNDAY = 7;
    
    public static final int MONTH_1_JANUARY = 1;
    
    public static final int MONTH_2_FEBRUARY = 2;
    
    public static final int MONTH_3_MARCH = 3;
    
    public static final int MONTH_4_APRIL= 4;
    
    public static final int MONTH_5_MAY = 5;
    
    public static final int MONTH_6_JUNE = 6;
    
    public static final int MONTH_7_JULY = 7;
    
    public static final int MONTH_8_AUGUST = 8;
    
    public static final int MONTH_9_SEPTEMBER = 9;
    
    public static final int MONTH_10_OCTOBER = 10;
    
    public static final int MONTH_11_NOVEMBER = 11;
    
    public static final int MONTH_12_DECEMBER= 12;
    
    public static final String FORMAT_DATE = "yyyy-MM-dd";
    
    public static final String FORMAT_HOUR = "yyyy-MM-dd HH";
    
    public static final String FORMAT_MINUTE = "yyyy-MM-dd HH:mm";
    
    public static final String FORMAT_SECOND = "yyyy-MM-dd HH:mm:ss";
    
    public static final String FORMAT_MILLISECOND = "yyyy-MM-dd HH:mm:ss:SSS";
    
    public static final String FORMAT_NO_DATE = "yyyyMMdd";
    
    public static final String FORMAT_NO_HOUR = "yyyyMMddHH";
    
    public static final String FORMAT_NO_MINUTE = "yyyyMMddHHmm";
    
    public static final String FORMAT_NO_SECOND = "yyyyMMddHHmmss";
    
    public static final String FORMAT_NO_MILLISECOND = "yyyyMMddHHmmssSSS";
    
    private static final Map<String, SimpleDateFormat> simpleDateFormatMap = new HashMap<String, SimpleDateFormat>();
    static {
        simpleDateFormatMap.put(FORMAT_DATE, new SimpleDateFormat(FORMAT_DATE));
        simpleDateFormatMap.put(FORMAT_HOUR, new SimpleDateFormat(FORMAT_HOUR));
        simpleDateFormatMap.put(FORMAT_MINUTE, new SimpleDateFormat(FORMAT_MINUTE));
        simpleDateFormatMap.put(FORMAT_SECOND, new SimpleDateFormat(FORMAT_SECOND));
        simpleDateFormatMap.put(FORMAT_MILLISECOND, new SimpleDateFormat(FORMAT_MILLISECOND));
        simpleDateFormatMap.put(FORMAT_NO_DATE, new SimpleDateFormat(FORMAT_NO_DATE));
        simpleDateFormatMap.put(FORMAT_NO_HOUR, new SimpleDateFormat(FORMAT_NO_HOUR));
        simpleDateFormatMap.put(FORMAT_NO_MINUTE, new SimpleDateFormat(FORMAT_NO_MINUTE));
        simpleDateFormatMap.put(FORMAT_NO_SECOND, new SimpleDateFormat(FORMAT_NO_SECOND));
        simpleDateFormatMap.put(FORMAT_NO_MILLISECOND, new SimpleDateFormat(FORMAT_NO_MILLISECOND));
    }
 
    
    private static SimpleDateFormat getSimpleDateFormat(String formatStyle) {
        SimpleDateFormat dateFormat = simpleDateFormatMap.get(formatStyle);
        if (Objects.nonNull(dateFormat)) {
            return dateFormat;
        }
        return new SimpleDateFormat(formatStyle);
    }
 
    
    public static String format(Date date, String formatStyle) {
        if (Objects.isNull(date)) {
            return "";
        }
        return getSimpleDateFormat(formatStyle).format(date);
    }
 
    
    public static String formatDate(Date date) {
        return format(date, FORMAT_DATE);
    }
 
    
    public static String formatDateTime(Date date) {
        return format(date, FORMAT_SECOND);
    }
 
    
    public static String formatDateTimeStamp(Date date) {
        return format(date, FORMAT_MILLISECOND);
    }
 
    
    public static Date parseDate(String dateString) {
        return parse(dateString, FORMAT_DATE);
    }
 
    
    public static Date parseDateTime(String dateTimeStr) {
        return parse(dateTimeStr, FORMAT_SECOND);
    }
 
    
    public static Date parseDateTimeStamp(String dateTimeStampStr) {
        return parse(dateTimeStampStr, FORMAT_MILLISECOND);
    }
 
    
    public static Date parse(String dateString, String formatStyle) {
        String s = getString(dateString);
        if (s.isEmpty()) {
            return null;
        }
        try {
            return getSimpleDateFormat(formatStyle).parse(dateString);
        } catch (ParseException e) {
            e.printStackTrace();
            return null;
        }
    }
 
    
    private static String getString(String s) {
        return Objects.isNull(s) ? "" : s.trim();
    }
 
    
    public static Date getDateStart(Date date) {
        if (Objects.isNull(date)) {
            return null;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(Calendar.HOUR_OF_DAY, 0);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        return calendar.getTime();
    }
 
    
    public static Date getDateEnd(Date date) {
        if (Objects.isNull(date)) {
            return null;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(Calendar.HOUR_OF_DAY, 23);
        calendar.set(Calendar.MINUTE, 59);
        calendar.set(Calendar.SECOND, 59);
        calendar.set(Calendar.MILLISECOND, 999);
        return calendar.getTime();
    }
 
    
    public static int getDateNo(Date date) {
        if (Objects.isNull(date)) {
            return 0;
        }
        return Integer.valueOf(format(date, FORMAT_NO_DATE));
    }
 
    
    public static long getDateTimeNo(Date date) {
        if (Objects.isNull(date)) {
            return 0L;
        }
        return Long.valueOf(format(date, FORMAT_NO_SECOND));
    }
 
    
    public static long getDateTimeStampNo(Date date) {
        if (Objects.isNull(date)) {
            return 0L;
        }
        return Long.valueOf(format(date, FORMAT_NO_MILLISECOND));
    }
 
    
    public static int getWeek(Date date) {
        if (Objects.isNull(date)) {
            return 0;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        return getWeek(calendar);
    }
 
    
    private static int getWeek(Calendar calendar) {
        switch (calendar.get(Calendar.DAY_OF_WEEK)) {
        case Calendar.MONDAY:
            return 1;
        case Calendar.TUESDAY:
            return 2;
        case Calendar.WEDNESDAY:
            return 3;
        case Calendar.THURSDAY:
            return 4;
        case Calendar.FRIDAY:
            return 5;
        case Calendar.SATURDAY:
            return 6;
        case Calendar.SUNDAY:
            return 7;
        default:
            return 0;
        }
    }
 
    
    public static int getWeekOfYear(Date date) {
        if (Objects.isNull(date)) {
            return -1;
        }
        int weeks = getWeekOfYearIgnoreLastYear(date);
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(Calendar.MONTH, Calendar.JANUARY);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        int week = getWeek(calendar);
        if (week == 1) {
            return weeks;
        }
        return weeks - 1;
    }
 
    
    public static int getWeekOfYearIgnoreLastYear(Date date) {
        if (Objects.isNull(date)) {
            return -1;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        int days = calendar.get(Calendar.DAY_OF_YEAR);
        int weeks = days / 7;
        // 如果是 7 的倍数，则表示恰好是多少周
        if (days % 7 == 0) {
            return weeks;
        }
        // 如果有余数，则需要再加 1
        return weeks + 1;
    }
 
    
    public static DateNode getDateNode(Date date) {
        if (Objects.isNull(date)) {
            return null;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        DateNode node = new DateNode();
        node.setTime(format(date, FORMAT_MILLISECOND));
        node.setYear(calendar.get(Calendar.YEAR));
        node.setMonth(calendar.get(Calendar.MONTH) + 1);
        node.setDay(calendar.get(Calendar.DAY_OF_MONTH));
        node.setHour(calendar.get(Calendar.HOUR_OF_DAY));
        node.setMinute(calendar.get(Calendar.MINUTE));
        node.setSecond(calendar.get(Calendar.SECOND));
        node.setMillisecond(calendar.get(Calendar.MILLISECOND));
        node.setWeek(getWeek(calendar));
        node.setDayOfYear(calendar.get(Calendar.DAY_OF_YEAR));
        node.setWeekOfYear(getWeekOfYear(date));
        node.setWeekOfYearIgnoreLastYear(getWeekOfYearIgnoreLastYear(date));
        node.setMillisecondStamp(date.getTime());
        node.setSecondStamp(node.getMillisecondStamp() / 1000);
        return node;
    }
 
    
    public static Date add(Date date, int field, int amount) {
        if (Objects.isNull(date)) {
            return null;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.add(field, amount);
        return calendar.getTime();
    }
 
    
    public static Date addYear(Date date, int year) {
        return add(date, Calendar.YEAR, year);
    }
 
    
    public static Date addMonth(Date date, int month) {
        return add(date, Calendar.MONTH, month);
    }
 
    
    public static Date addDay(Date date, int day) {
        return add(date, Calendar.DAY_OF_YEAR, day);
    }
 
    
    public static Date addWeek(Date date, int week) {
        return add(date, Calendar.WEEK_OF_YEAR, week);
    }
 
    
    public static Date addHour(Date date, int hour) {
        return add(date, Calendar.HOUR_OF_DAY, hour);
    }
 
    
    public static Date addMinute(Date date, int minute) {
        return add(date, Calendar.MINUTE, minute);
    }
 
    
    public static Date addSecond(Date date, int second) {
        return add(date, Calendar.SECOND, second);
    }
 
    
    public static Date addMillisecond(Date date, int millisecond) {
        return add(date, Calendar.MILLISECOND, millisecond);
    }
 
    
    public static Date getWeekDate(Date date, int index) {
        if (index < WEEK_1_MONDAY || index > WEEK_7_SUNDAY) {
            return null;
        }
        int week = getWeek(date);
        return addDay(date, index - week);
    }
 
    
    public static Date getWeekDateStart(Date date) {
        return getDateStart(getWeekDate(date, WEEK_1_MONDAY));
    }
 
    
    public static Date getWeekDateEnd(Date date) {
        return getWeekDateEnd(getWeekDate(date, WEEK_7_SUNDAY));
    }
 
    
    public static List<Date> getWeekDateList(Date date) {
        if (Objects.isNull(date)) {
            return Collections.emptyList();
        }
        // 获取本周开始时间
        Date weekFromDate = getWeekDateStart(date);
        // 获取本周截止时间
        Date weekeEndDate = getWeekDateEnd(date);
        return getBetweenDateList(weekFromDate, weekeEndDate, true);
    }
 
    
    public static List<String> getWeekDateList(String dateString) {
        Date date = parseDate(dateString);
        if (Objects.isNull(date)) {
            return Collections.emptyList();
        }
        return getDateStrList(getWeekDateList(date));
    }
 
    
    public static List<Date> getMonthDateList(Date date) {
        if (Objects.isNull(date)) {
            return Collections.emptyList();
        }
        Date monthDateStart = getMonthDateStart(date);
        Date monthDateEnd = getMonthDateEnd(date);
        return getBetweenDateList(monthDateStart, monthDateEnd, true);
    }
 
    
    public static List<String> getMonthDateList(String dateString) {
        Date date = parseDate(dateString);
        if (Objects.isNull(date)) {
            return Collections.emptyList();
        }
        return getDateStrList(getMonthDateList(date));
    }
    
    
    public static Date getMonthDateStart(Date date) {
        if (Objects.isNull(date)) {
            return null;
        }
        Calendar calendar = Calendar.getInstance();
        calendar.setTime(date);
        calendar.set(Calendar.DAY_OF_MONTH, 1);
        return getDateStart(calendar.getTime());
    }
 
    
    public static Date getMonthDateEnd(Date date) {
        if (Objects.isNull(date)) {
            return null;
        }
        Date monthDateStart = getMonthDateStart(date);
        Date nextMonthDateStart = getMonthDateStart(addMonth(monthDateStart, 1));
        return getDateEnd(addDay(nextMonthDateStart, -1));
    }
 
    
    public static int countBetweenDays(Date date1, Date date2) {
        if (Objects.isNull(date1) || Objects.isNull(date2)) {
            return -1;
        }
        // 获取两个日期 0 点 0 时 0 分 0 秒 0 毫秒时的时间戳（毫秒级）
        long t1 = getDateStart(date1).getTime();
        long t2 = getDateStart(date2).getTime();
        // 相差天数 = 相差的毫秒数 / 一天的毫秒数
        return (int) (Math.abs(t1 - t2) / DAY_MILLISECONDS);
    }
 
    
    public static List<Date> getBetweenDateList(Date date1, Date date2) {
        return getBetweenDateList(date1, date2, false);
    }
 
    
    public static List<Date> getBetweenDateList(Date date1, Date date2, boolean isContainParams) {
        if (Objects.isNull(date1) || Objects.isNull(date2)) {
            return Collections.emptyList();
        }
        // 确定前后日期
        Date fromDate = date1;
        Date toDate = date2;
        if (date2.before(date1)) {
            fromDate = date2;
            toDate = date1;
        }
        // 获取两个日期每天的开始时间
        Date from = getDateStart(fromDate);
        Date to = getDateStart(toDate);
        // 获取日期，开始循环
        List<Date> dates = new ArrayList<Date>();
        if (isContainParams) {
            dates.add(from);
        }
        Date date = from;
        boolean isBefore = true;
        while (isBefore) {
            date = addDay(date, 1);
            isBefore = date.before(to);
            if (isBefore) {
                dates.add(getDateStart(date));
            }
        }
        if (isContainParams) {
            dates.add(to);
        }
        return dates;
    }
 
    
    public static List<String> getBetweenDateList(String dateString1, String dateString2) {
        return getBetweenDateList(dateString1, dateString2, false);
    }
 
    
    public static List<String> getBetweenDateList(String dateString1, String dateString2, boolean isContainParams) {
        Date date1 = parseDate(dateString1);
        Date date2 = parseDate(dateString2);
        List<Date> dates = getBetweenDateList(date1, date2, isContainParams);
        return getDateStrList(dates);
    }
 
    
    public static List<String> getDateStrList(List<Date> dates) {
        if (dates.isEmpty()) {
            return Collections.emptyList();
        }
        List<String> dateList = new ArrayList<String>();
        for (Date date : dates) {
            dateList.add(formatDate(date));
        }
        return dateList;
    }
 
    static class DateNode {
        
        private int year;
        
        private int month;
        
        private int day;
        
        private int hour;
        
        private int minute;
        
        private int second;
        
        private int millisecond;
        
        private int week;
        
        private int dayOfYear;
        
        private int weekOfYear;
        
        private int weekOfYearIgnoreLastYear;
        
        private long secondStamp;
        
        private long millisecondStamp;
        
        private String time;
 
        public int getYear() {
            return year;
        }
 
        public void setYear(int year) {
            this.year = year;
        }
 
        public int getMonth() {
            return month;
        }
 
        public void setMonth(int month) {
            this.month = month;
        }
 
        public int getDay() {
            return day;
        }
 
        public void setDay(int day) {
            this.day = day;
        }
 
        public int getHour() {
            return hour;
        }
 
        public void setHour(int hour) {
            this.hour = hour;
        }
 
        public int getMinute() {
            return minute;
        }
 
        public void setMinute(int minute) {
            this.minute = minute;
        }
 
        public int getSecond() {
            return second;
        }
 
        public void setSecond(int second) {
            this.second = second;
        }
 
        public int getMillisecond() {
            return millisecond;
        }
 
        public void setMillisecond(int millisecond) {
            this.millisecond = millisecond;
        }
 
        public int getWeek() {
            return week;
        }
 
        public void setWeek(int week) {
            this.week = week;
        }
 
        public int getDayOfYear() {
            return dayOfYear;
        }
 
        public void setDayOfYear(int dayOfYear) {
            this.dayOfYear = dayOfYear;
        }
 
        public int getWeekOfYear() {
            return weekOfYear;
        }
 
        public void setWeekOfYear(int weekOfYear) {
            this.weekOfYear = weekOfYear;
        }
 
        public int getWeekOfYearIgnoreLastYear() {
            return weekOfYearIgnoreLastYear;
        }
 
        public void setWeekOfYearIgnoreLastYear(int weekOfYearIgnoreLastYear) {
            this.weekOfYearIgnoreLastYear = weekOfYearIgnoreLastYear;
        }
 
        public long getSecondStamp() {
            return secondStamp;
        }
 
        public void setSecondStamp(long secondStamp) {
            this.secondStamp = secondStamp;
        }
 
        public long getMillisecondStamp() {
            return millisecondStamp;
        }
 
        public void setMillisecondStamp(long millisecondStamp) {
            this.millisecondStamp = millisecondStamp;
        }
 
        public String getTime() {
            return time;
        }
 
        public void setTime(String time) {
            this.time = time;
        }
 
    }
}