新增农历工具类

hutool-core/src/main/java/cn/hutool/core/date/ChineseDateUtil.java

@@ -0,0 +1,319 @@
+package cn.hutool.core.date;
+
+import cn.hutool.core.util.StrUtil;
+
+import java.util.ArrayList;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.List;
+
+
+/**
+ * 农历日期工具
+ *
+ * @author zjw
+ */
+public class ChineseDateUtil {
+
+    /**
+     * 构造方法传入日期
+     *
+     * @param date
+     */
+    public ChineseDateUtil(Date date) {
+        this.date = date;
+        Calendar cal = Calendar.getInstance();
+        cal.setTime(date);
+        int yearCyl, monCyl, dayCyl;
+        int leapMonth = 0;
+        Date baseDate = DateUtil.parse("1900年1月31日", "yyyy年MM月dd日");//chineseDateFormat.parse("1900年1月31日");
+        // 求出和1900年1月31日相差的天数
+        int offset = (int) ((cal.getTime().getTime() - baseDate.getTime()) / 86400000L);
+        dayCyl = offset + 40;
+        monCyl = 14;
+        // 用offset减去每农历年的天数
+        // 计算当天是农历第几天
+        // i最终结果是农历的年份
+        // offset是当年的第几天
+        int iYear, daysOfYear = 0;
+        for (iYear = 1900; iYear < 2050 && offset > 0; iYear++) {
+            daysOfYear = yearDays(iYear);
+            offset -= daysOfYear;
+            monCyl += 12;
+        }
+        if (offset < 0) {
+            offset += daysOfYear;
+            iYear--;
+            monCyl -= 12;
+        }
+        // 农历年份
+        year = iYear;
+        yearCyl = iYear - 1864;
+        leapMonth = leapMonth(iYear); // 闰哪个月,1-12
+        leap = false;
+        // 用当年的天数offset,逐个减去每月（农历）的天数，求出当天是本月的第几天
+        int iMonth, daysOfMonth = 0;
+        for (iMonth = 1; iMonth < 13 && offset > 0; iMonth++) {
+            // 闰月
+            if (leapMonth > 0 && iMonth == (leapMonth + 1) && !leap) {
+                --iMonth;
+                leap = true;
+                daysOfMonth = leapDays(year);
+            } else
+                daysOfMonth = monthDays(year, iMonth);
+            offset -= daysOfMonth;
+            // 解除闰月
+            if (leap && iMonth == (leapMonth + 1))
+                leap = false;
+            if (!leap)
+                monCyl++;
+        }
+        // offset为0时，并且刚才计算的月份是闰月，要校正
+        if (offset == 0 && leapMonth > 0 && iMonth == leapMonth + 1) {
+            if (leap) {
+                leap = false;
+            } else {
+                leap = true;
+                --iMonth;
+                --monCyl;
+            }
+        }
+        // offset小于0时，也要校正
+        if (offset < 0) {
+            offset += daysOfMonth;
+            --iMonth;
+            --monCyl;
+        }
+        month = iMonth;
+        day = offset + 1;
+    }
+
+
+    /**
+     * 获得农历年份
+     *
+     * @return 返回农历年份
+     */
+    public String getChineseYear() {
+        return String.valueOf(year);
+    }
+
+    /**
+     * 获得农历月份
+     *
+     * @return 返回农历月份
+     */
+    public String getChineseMonth() {
+        return (leap ? "闰" : "") + chineseNumber[month - 1] + "月";
+    }
+
+    /**
+     * 获得农历月称呼
+     *
+     * @return 返回农历月份称呼
+     */
+    public String getChineseMonthName() {
+        return (leap ? "闰" : "") + chineseNumberName[month - 1] + "月";
+    }
+
+    /**
+     * 获得农历日
+     *
+     * @return 获得农历日
+     */
+    public String getChineseDay() {
+        String chineseTen[] = {"初", "十", "廿", "卅"};
+        int n = day % 10 == 0 ? 9 : day % 10 - 1;
+        if (day > 30)
+            return "";
+        if (day == 10)
+            return "初十";
+        else
+            return chineseTen[day / 10] + chineseNumber[n];
+    }
+
+
+    /**
+     * 获得节日
+     *
+     * @return 获得农历节日
+     */
+    public String getFestivals() {
+        String currentChineseDate = "";
+        if (month < 10) {
+            currentChineseDate += "0" + month;
+        } else {
+            currentChineseDate += month;
+        }
+        if (day < 10) {
+            currentChineseDate += "0" + day;
+        } else {
+            currentChineseDate += day;
+        }
+
+        List<String> getFestivalsList = new ArrayList<>();
+        for (String fv : lFtv) {
+            String date = fv.split(" ")[0];
+            String name = fv.split(" ")[1];
+            if (date.equals(currentChineseDate)) {
+                getFestivalsList.add(name);
+            }
+        }
+        return StrUtil.join(",", getFestivalsList);
+    }
+
+
+    /**
+     * 获得当前日期是星期几
+     *
+     * @return 获得星期
+     */
+    public String getWeekOfDate() {
+        String[] weekDays = {"星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"};
+        Calendar cal = Calendar.getInstance();
+        cal.setTime(date);
+        int w = cal.get(Calendar.DAY_OF_WEEK) - 1;
+        if (w < 0)
+            w = 0;
+        return weekDays[w];
+    }
+
+
+    /**
+     * 获得年份生肖
+     *
+     * @return 获得年份生肖
+     */
+    public String getAnimals() {
+        final String[] Animals = new String[]{"鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪"};
+        return Animals[(year - 4) % 12];
+    }
+
+
+    /**
+     * 获得天干地支
+     *
+     * @return 获得天干地支
+     */
+    public String getCyclical() {
+        int num = year - 1900 + 36;
+        return (cyclicalm(num));
+    }
+
+    @Override
+    public String toString() {
+        return String.format("%s%s年 %s%s %s", getCyclical(), getAnimals(), getChineseMonthName(), getChineseDay(), getWeekOfDate());
+    }
+
+
+    // -------------------- private --------------------
+    private Date date;
+    //农历年
+    private int year;
+    //农历月
+    private int month;
+    //农历日
+    private int day;
+    //是否闰年
+    private boolean leap;
+    private String chineseNumber[] = {"一", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二"};
+    private String chineseNumberName[] = {"正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "腊"};
+    private 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, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950,
+            0x06aa0, 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260,
+            0x0f263, 0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5, 0x04ad0,
+            0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 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};
+    //农历节日  *表示放假日
+    private String[] lFtv = new String[]{
+            "0101 春节", "0102 大年初二", "0103 大年初三", "0104 大年初四",
+            "0105 大年初五", "0106 大年初六", "0107 大年初七", "0105 路神生日",
+            "0115 元宵节", "0202 龙抬头", "0219 观世音圣诞", "0404 寒食节",
+            "0408 佛诞节 ", "0505 端午节", "0606 天贶节 姑姑节", "0624 彝族火把节",
+            "0707 七夕情人节", "0714 鬼节(南方)", "0715 盂兰节", "0730 地藏节",
+            "0815 中秋节", "0909 重阳节", "1001 祭祖节", "1117 阿弥陀佛圣诞",
+            "1208 腊八节 释迦如来成道日", "1223 过小年", "1229 腊月二十九", "1230 除夕"};
+
+    /**
+     * 传入 月日的offset 传回干支, 0=甲子
+     */
+    private static String cyclicalm(int num) {
+        final String[] Gan = new String[]{"甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸"};
+        final String[] Zhi = new String[]{"子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥"};
+        return (Gan[num % 10] + Zhi[num % 12]);
+    }
+
+    /**
+     * 传回农历 y年的总天数
+     *
+     * @param y
+     * @return
+     */
+    private int yearDays(int y) {
+        int i, sum = 348;
+        for (i = 0x8000; i > 0x8; i >>= 1) {
+            if ((lunarInfo[y - 1900] & i) != 0)
+                sum += 1;
+        }
+        return (sum + leapDays(y));
+    }
+
+    /**
+     * 传回农历 y年闰月的天数
+     *
+     * @param y
+     * @return
+     */
+    private int leapDays(int y) {
+        if (leapMonth(y) != 0) {
+            if ((lunarInfo[y - 1900] & 0x10000) != 0)
+                return 30;
+            else
+                return 29;
+        } else
+            return 0;
+    }
+
+
+    /**
+     * 传回农历 y年m月的总天数
+     *
+     * @param y
+     * @param m
+     * @return
+     */
+    private int monthDays(int y, int m) {
+        if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
+            return 29;
+        else
+            return 30;
+    }
+
+    /**
+     * 传回农历 y年闰哪个月 1-12 , 没闰传回 0
+     *
+     * @param y
+     * @return
+     */
+    private int leapMonth(int y) {
+        return (int) (lunarInfo[y - 1900] & 0xf);
+    }
+
+    // -------------------- private end -----------------
+}

hutool-core/src/test/java/cn/hutool/core/date/ChineseDateUtilTest.java

@@ -0,0 +1,21 @@
+package cn.hutool.core.date;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class ChineseDateUtilTest {
+
+    @Test
+    public void chineseDateTest() {
+        ChineseDateUtil date = new ChineseDateUtil(DateUtil.parseDate("2020-01-25"));
+        Assert.assertEquals("2020", date.getChineseYear());
+        Assert.assertEquals("一月", date.getChineseMonth());
+        Assert.assertEquals("正月", date.getChineseMonthName());
+        Assert.assertEquals("初一", date.getChineseDay());
+        Assert.assertEquals("星期六", date.getWeekOfDate());
+        Assert.assertEquals("庚子", date.getCyclical());
+        Assert.assertEquals("鼠", date.getAnimals());
+        Assert.assertEquals("春节", date.getFestivals());
+        Assert.assertEquals("庚子鼠年 正月初一 星期六", date.toString());
+    }
+}