Java日期时间API系列11-----Jdk8中java.time包中的新的日期时间API类，使用java8日期时间API重写农历LunarDate

　　通过Java日期时间API系列7-----Jdk8中java.time包中的新的日期时间API类的优点，java8具有很多优点，现在网上查到的农历转换工具类都是基于jdk7及以前的类写的，下面使用java新的日期时间API重写农历LunarDate。

1. version 0.1版本 农历原始算法来自网络，有2个问题：

（1）com.xkzhangsan.time.LunarDate.lunarInfo 数据有误，导致个别农历计算不准确。

（2）没有二十四节气计算。

2.version 0.2版本修改了上面问题：

package com.xkzhangsan.time;

import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.temporal.Temporal;
import java.time.temporal.TemporalField;
import java.time.temporal.TemporalUnit;
import java.util.Date;

import com.xkzhangsan.time.calculator.DateTimeCalculatorUtil;
import com.xkzhangsan.time.converter.DateTimeConverterUtil;
import com.xkzhangsan.time.holiday.ChineseHolidayEnum;

/**
 * 农历日期
 * 仅支持公历1901-1950年的农历转换
* @ClassName: LunarDate
* @Description: LunarDate
* @author xkzhangsan
* @date 2019年12月30日
* @version 0.2 试用
 */
public final class LunarDate implements Temporal{

    /**
     * 农历信息
     */
    private static final long[] lunarInfo = new long[] { 0x04bd8, 0x04ae0, 0x0a570, 0x054d5, 0x0d260, 0x0d950, 0x16554,
            0x056a0, 0x09ad0, 0x055d2, 0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0, 0x0ada2, 0x095b0,
            0x14977, 0x04970, 0x0a4b0, 0x0b4b5, 0x06a50, 0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970, 0x06566,
            0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0, 0x1c8d7, 0x0c950, 0x0d4a0, 0x1d8a6, 0x0b550,
            0x056a0, 0x1a5b4, 0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557, 0x06ca0, 0x0b550, 0x15355, 0x04da0, 0x0a5b0,
            0x14573, 0x052b0, 0x0a9a8, 0x0e950, 0x06aa0, 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263,
            0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b6a0,
            0x195a6, 0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40, 0x0af46, 0x0ab60, 0x09570, 0x04af5,
            0x04970, 0x064b0, 0x074a3, 0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, 0x0c960, 0x0d954, 0x0d4a0,
            0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0, 0x092d0, 0x0cab5, 0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9,
            0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, 0x07954, 0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0,
            0x0d260, 0x0ea65, 0x0d530, 0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520,
            0x0dd45, 0x0b5a0, 0x056d0, 0x055b2, 0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0,
            0x14b63 };

    /**
     * 农历月份列表
     */
    public static final String[] lunarMonth = new String[] { "", "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "冬",
            "腊" };

    /**
     * 天干列表
     */
    private static final String[] tianGan = new String[] { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };

    /**
     * 地支列表
     */
    private static final String[] diZhi = new String[] { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥" };

    /**
     * 生肖列表
     */
    private static final String[] animals = new String[] { "鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };

    /**
     * 中文数字0-9
     */
    public static final String[] numStr = new String[] { "〇", "一", "二", "三", "四", "五", "六", "七", "八", "九"};    

    /**
     * 二十四节气
     */
    public static final String[] solarTerms = new String[] {"小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨","立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑","白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至"};

    /**
     * 二十四节气数据
     */
    private static final long[] solarTermInfo = new long[] {0,21208,42467,63836,85337,107014,128867,150921,173149,195551,218072,240693,263343,285989,308563,331033,353350,375494,397447,419210,440795,462224,483532,504758};

    /**
     * 标准日期
     */
    private final LocalDate localDate;

    /**
     * 农历日期，中文
     */
    private String lDateCn;

    /**
     * 岁次
     */
    private String suiCi;

    /**
     * 生肖
     */
    private String lAnimal;

    /**
     * 农历年
     */
    private int lYear;

    /**
     * 农历月
     */
    private int lMonth;

    /**
     * 农历日
     */
    private int lDay;

    /**
     * 农历年，中文
     */
    private String lYearCn;

    /**
     * 农历月，中文
     */
    private String lMonthCn;

    /**
     * 农历日，中文
     */
    private String lDayCn;

    /**
     * 星期，中文
     */
    private String weekCn;

    /**
     * 二十四节气
     */
    private String solarTerm;

    /**
     * 当前日期月份是否为闰月，是 为"闰"
     */
    private String leapMonthCn;

    private LunarDate(LocalDate localDate) {
        super();
        this.localDate = localDate;
        initialize();
    }

    /**
     * 初始化农历日期
     */
    public void initialize() {
        int year = localDate.getYear();
        int month = localDate.getMonthValue();
        int day = localDate.getDayOfMonth();
        long[] l = calElement(year, month, day);

        this.lYear = (int) l[0];
        this.lMonth = (int) l[1];
        this.lDay = (int) l[2];

        this.suiCi = cyclical(this.lYear);
        this.lAnimal = animalsYear(this.lYear);

        this.lYearCn = getChinaYear(this.lYear);
        this.lMonthCn = lunarMonth[this.lMonth];
        this.lDayCn = getChinaDay(this.lDay);

        this.weekCn = getWeekCn(localDate.getDayOfWeek().getValue());
        if(l[7] != -1){
            this.solarTerm = solarTerms[(int)l[7]];
        }else{
            this.solarTerm = "";
        }
        if(l[6] == 1){
            this.leapMonthCn = "闰";
        }else{
            this.leapMonthCn = "";
        }
        this.lDateCn = this.lYearCn + "年" + this.leapMonthCn + this.lMonthCn + "月" + this.lDayCn;
    }

    /**
     * 通过LocalDateTime创建LunarDate
     * @param localDateTime
     * @return
     */
    public static LunarDate from(LocalDateTime localDateTime) {
        return new LunarDate(DateTimeConverterUtil.toLocalDate(localDateTime));
    }

    /**
     * 通过LocalDate创建LunarDate
     * @param localDate
     * @return
     */
    public static LunarDate from(LocalDate localDate) {
        return new LunarDate(localDate);
    }

    /**
     * 通过Instant创建LunarDate
     * @param instant
     * @return
     */
    public static LunarDate from(Instant instant) {
        return new LunarDate(DateTimeConverterUtil.toLocalDate(instant));
    }    

    /**
     * 通过Date创建LunarDate
     * @param date
     * @return
     */
    public static LunarDate from(Date date) {
        return new LunarDate(DateTimeConverterUtil.toLocalDate(date));
    }

    public static LunarDate from(Temporal temporal) {
        return new LunarDate(DateTimeConverterUtil.toLocalDate(temporal));
    }

    /**
     * 传回农历year年的总天数
     *
     * @param year
     * @return
     */
    private static final int lunarYearDays(int year) {
        int i, sum = 348;
        for (i = 0x8000; i > 0x8; i >>= 1) {
            if ((lunarInfo[year - 1900] & i) != 0)
                sum += 1;
        }
        return (sum + leapMonthDays(year));
    }

    /**
     * 传回农历 year年闰月的天数
     *
     * @param year
     * @return
     */
    private static final int leapMonthDays(int year) {
        if (leapMonth(year) != 0) {
            if ((lunarInfo[year - 1900] & 0x10000) != 0)
                return 30;
            else
                return 29;
        } else
            return 0;
    }

    /**
     * 传回农历 year年闰哪个月 1-12 , 没闰传回 0
     *
     * @param year
     * @return
     */
    private static final int leapMonth(int year) {
        return (int) (lunarInfo[year - 1900] & 0xf);
    }

    /**
     * 传回农历 year年month月的总天数
     *
     * @param year
     * @param month
     * @return
     */
    private static final int monthDays(int year, int month) {
        if ((lunarInfo[year - 1900] & (0x10000 >> month)) == 0)
            return 29;
        else
            return 30;
    }

    /**
     * 传回农历 year年的生肖
     *
     * @param year
     * @return
     */
    public static final String animalsYear(int year) {
        return animals[(year - 4) % 12];
    }

    /**
     * 传入 月日的offset 传回干支,0=甲子
     *
     * @param num
     * @return
     */
    private static final String cyclicalm(int num) {
        return (tianGan[num % 10] + diZhi[num % 12]);
    }

    /**
     * 传入 offset 传回干支, 0=甲子
     *
     * @param year
     * @return
     */
    public static final String cyclical(int year) {
        int num = year - 1900 + 36;
        return (cyclicalm(num));
    }

    /**
     * 计算某年第n个节气的天
     * @param year 公历年
     * @param n
     * @return
     */
    public static final int solarTerm(int year, int n){
        LocalDateTime startLocalDateTime = LocalDateTime.of(1900,1,6,2,5);
        long millis = (long) ((31556925974.7*(year-1900) + solarTermInfo[n]*60000));
        LocalDateTime tempLocalDateTime = DateTimeCalculatorUtil.plusMillis(startLocalDateTime, millis);
        return tempLocalDateTime.getDayOfMonth();
    }

    /**
     * 传出year年month月day日对应的农历.year0 .month1 .day2 .yearCyl3 .monCyl4 .dayCyl5
     * .isLeap6.solarTermIndex7
     *
     * @param year
     * @param month
     * @param day
     * @return
     */
    public static final long[] calElement(int year, int month, int day) {
        long[] nongDate = new long[8];
        int i = 0, temp = 0, leap = 0;
        LocalDateTime baseDate = LocalDate.of(1900, 1, 31).atStartOfDay();
        LocalDateTime objDate = LocalDate.of(year, month, day).atStartOfDay();
        long offset = DateTimeCalculatorUtil.betweenTotalDays(baseDate, objDate);
        nongDate[5] = offset + 40;
        nongDate[4] = 14;
        for (i = 1900; i < 2050 && offset > 0; i++) {
            temp = lunarYearDays(i);
            offset -= temp;
            nongDate[4] += 12;
        }
        if (offset < 0) {
            offset += temp;
            i--;
            nongDate[4] -= 12;
        }
        nongDate[0] = i;
        nongDate[3] = i - 1864;
        leap = leapMonth(i); // 闰哪个月
        nongDate[6] = 0;
        for (i = 1; i < 13 && offset > 0; i++) {
            // 闰月
            if (leap > 0 && i == (leap + 1) && nongDate[6] == 0) {
                --i;
                nongDate[6] = 1;
                temp = leapMonthDays((int) nongDate[0]);
            } else {
                temp = monthDays((int) nongDate[0], i);
            }
            // 解除闰月
            if (nongDate[6] == 1 && i == (leap + 1))
                nongDate[6] = 0;
            offset -= temp;
            if (nongDate[6] == 0)
                nongDate[4]++;
        }
        if (offset == 0 && leap > 0 && i == leap + 1) {
            if (nongDate[6] == 1) {
                nongDate[6] = 0;
            } else {
                nongDate[6] = 1;
                --i;
                --nongDate[4];
            }
        }
        if (offset < 0) {
            offset += temp;
            --i;
            --nongDate[4];
        }
        nongDate[1] = i;
        nongDate[2] = offset + 1;

        //二十四节气
        int solarTermIndex = -1;
        int tempMonth = month - 1;
        int firstSolarTermOfMonth = solarTerm(year, tempMonth*2);
        int secondSolarTermOfMonth = solarTerm(year, tempMonth*2+1);
        if(day == firstSolarTermOfMonth){
            solarTermIndex = tempMonth*2;
        }else if(day == secondSolarTermOfMonth){
            solarTermIndex = tempMonth*2 + 1;
        }
        nongDate[7] = solarTermIndex;
        return nongDate;
    }

    /**
     * 获取农历中文年
     * @param year
     * @return
     */
    public final static String getChinaYear(int year) {
        String ge = numStr[year % 10];
        String shi = numStr[year / 10 % 10];
        String bai = numStr[year / 100 % 10];
        String qian = numStr[year / 1000 % 10];
        return qian + bai + shi + ge;
    }
    /**
     * 获取农历中文日期
     * @param day
     * @return
     */
    public final static String getChinaDay(int day) {
        String a = "";
        if (day == 10)
            return "初十";
        if (day == 20)
            return "二十";
        if (day == 30)
            return "三十";
        int two = (int) ((day) / 10);
        if (two == 0)
            a = "初";
        if (two == 1)
            a = "十";
        if (two == 2)
            a = "廿";
        if (two == 3)
            a = "三";
        int one = (int) (day % 10);
        switch (one) {
        case 1:
            a += "一";
            break;
        case 2:
            a += "二";
            break;
        case 3:
            a += "三";
            break;
        case 4:
            a += "四";
            break;
        case 5:
            a += "五";
            break;
        case 6:
            a += "六";
            break;
        case 7:
            a += "七";
            break;
        case 8:
            a += "八";
            break;
        case 9:
            a += "九";
            break;
        default:
            a += "";
            break;
        }
        return a;
    }

    /**
     * 获取中文星期
     * @param week
     * @return
     */
    public final static String getWeekCn(int week) {
        String weekCn = "";
        switch (week) {
        case 1:
            weekCn = "星期一";
            break;
        case 2:
            weekCn = "星期二";
            break;
        case 3:
            weekCn = "星期三";
            break;
        case 4:
            weekCn = "星期四";
            break;
        case 5:
            weekCn = "星期五";
            break;
        case 6:
            weekCn = "星期六";
            break;
        case 7:
            weekCn = "星期日";
            break;
        default:
            weekCn = "";
            break;
        }
        return weekCn;
    }

    /**
     * 以当前时间创建农历日期LunarDate
     * @return
     */
    public static LunarDate now() {
        LocalDate today = LocalDate.now();
        return new LunarDate(today);
    }

    public LocalDate getLocalDate() {
        return localDate;
    }

    public String getlDateCn() {
        return lDateCn;
    }

    public String getSuiCi() {
        return suiCi;
    }

    public String getlAnimal() {
        return lAnimal;
    }

    public int getlYear() {
        return lYear;
    }

    public int getlMonth() {
        return lMonth;
    }

    public int getlDay() {
        return lDay;
    }

    public String getlYearCn() {
        return lYearCn;
    }

    public String getlMonthCn() {
        return lMonthCn;
    }

    public String getlDayCn() {
        return lDayCn;
    }

    public String getWeekCn() {
        return weekCn;
    }

    public String getSolarTerm() {
        return solarTerm;
    }

    public String getLeapMonthCn() {
        return leapMonthCn;
    }

    @Override
    public String toString() {
        return "LunarDate [localDate=" + localDate + ",lDateCn=" + lDateCn + ", suiCi=" + suiCi + ", lAnimal=" + lAnimal + ", lYear=" + lYear
                + ", lMonth=" + lMonth + ", lDay=" + lDay + ", lYearCn=" + lYearCn + ", lMonthCn=" + lMonthCn
                + ", lDayCn=" + lDayCn + ", weekCn=" + weekCn + ", solarTerm=" + solarTerm + ", leapMonthCn=" + leapMonthCn + "]";
    }

    /**
     * 格式化输出，如：庚子鼠年 二〇二〇年正月初一 星期六 春节
     * @return
     */
    public String formatLongCnWithChineseHoliday(){
        return suiCi + lAnimal + "年 " + lDateCn + " " + weekCn + " " + ChineseHolidayEnum.getHoliday(localDate).getName();
    }    

    /**
     * 格式化输出，如： 己亥猪年 二〇一九年腊月初六 星期二
     * @return
     */
    public String formatLongCn(){
        return suiCi + lAnimal + "年 " + lDateCn + " " + weekCn;
    }

    /**
     * 格式化输出，如： 0101
     * @return
     */
    public String formatShort(){
        return String.format("%02d", lMonth) + String.format("%02d", lDay);
    }

    @Override
    public boolean isSupported(TemporalField field) {
        return localDate.isSupported(field);
    }

    @Override
    public long getLong(TemporalField field) {
        return localDate.getLong(field);
    }

    @Override
    public boolean isSupported(TemporalUnit unit) {
        return localDate.isSupported(unit);
    }

    @Override
    public Temporal with(TemporalField field, long newValue) {
        return localDate.with(field, newValue);
    }

    @Override
    public Temporal plus(long amountToAdd, TemporalUnit unit) {
        return localDate.plus(amountToAdd, unit);
    }

    @Override
    public long until(Temporal endExclusive, TemporalUnit unit) {
        return localDate.until(endExclusive, unit);
    }

    public static void main(String[] args) {
        String str =LunarDate.now().toString();
        System.out.println(str);
    }

}

输出：

LunarDate [localDate=2020-03-22,lDateCn=二〇二〇年二月廿九, suiCi=庚子, lAnimal=鼠, lYear=2020, lMonth=2, lDay=29, lYearCn=二〇二〇, lMonthCn=二, lDayCn=廿九, weekCn=星期日, solarTerm=, leapMonthCn=]

源码地址：https://github.com/xkzhangsan/xk-time