那位大哥有JAVA制作农历的代码，或算法?

Question

这是一段生成农历的算法那位大侠帮忙注释一下，好多看不董的，不胜感激
主要注释一下calElement，getChinaDate方法
数组lunarInfo是怎么算出来的？
offset算出来的是什么？ 
nongDate中的每个元素都是什么？ public class LunarCalendar { final private static 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 };
final private static int[] year20 = new int[] { 1, 4, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1 };
final private static int[] year19 = new int[] { 0, 3, 0, 1, 0, 1, 0, 0, 1, 0, 1, 0 };
final private static int[] year2000 = new int[] { 0, 3, 1, 2, 1, 2, 1, 1, 2, 1, 2, 1 };
private final static String[] nStr1 = new String[]{"","正","二","三","四","五","六","七","八","九","十","十一","十二"}; private final static String[] Gan=new String[]{"甲","乙","丙","丁","戊","己","庚","辛","壬","癸"};
private final static String[] Zhi=new String[]{"子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥"};
private final static String[] Animals=new String[]{"鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪"};

final private static int lYearDays(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));
} final private static int leapDays(int y){
if (leapMonth(y) != 0) {
if ((lunarInfo[y - 1900] & 0x10000) != 0)
return 30;
else
return 29;
} else
return 0;
} final private static int leapMonth(int y){
return (int) (lunarInfo[y - 1900] & 0xf);
} final private static int monthDays(int y, int m){
if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
return 29;
else
return 30;
} final private static String AnimalsYear(int y){
return Animals[(y - 4) % 12];
} final private static String cyclicalm(int num)
{
return (Gan[num % 10] + Zhi[num % 12]);
} final private static String cyclical(int y){
int num = y - 1900 + 36;
return (cyclicalm(num));
} final private static long[] calElement(int y, int m, int d)
{
long[] nongDate = new long[7];
int i = 0, temp = 0, leap = 0;
//Date baseDate = new Date(0, 0, 31);
Date baseDate = new GregorianCalendar(0+1900,0,31).getTime();
//Date objDate = new Date(y - 1900, m - 1, d);
Date objDate = new GregorianCalendar(y,m-1,d).getTime();
long offset = (objDate.getTime() - baseDate.getTime()) / 86400000L;
nongDate[5] = offset + 40;
nongDate[4] = 14;
for (i = 1900; i < 2050 && offset > 0; i++) {
temp = lYearDays(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 = leapDays((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;
return nongDate;
} private final static String getChinaDate(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;
}
return a;
}
}

Answer 1

import java.io.*;
import java.util.*;
public class NongLi
{
final static 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
};final public static int lYearDays(int y)//====== 传回农历 y年的总天数
{
        int i,sum = 348;
        for(i=0x8000; i>0x8; i>>=1)
        {
                if ((lunarInfo[y-1900] & i)!=0) sum+=1;
        }
        return(sum+leapDays(y));
}final public static int leapDays(int y)//====== 传回农历 y年闰月的天数
{
        if(leapMonth(y)!=0)
        {
                if ((lunarInfo[y-1900] & 0x10000)!=0) return 30;
                else return 29;
        }
        else  return 0;
}final public static int leapMonth(int y)//====== 传回农历 y年闰哪个月 1-12 , 没闰传回 0
{
        return (int)(lunarInfo[y-1900] & 0xf);
}
final public static int monthDays(int y,int m)//====== 传回农历 y年m月的总天数
{
        if ((lunarInfo[y-1900] & (0x10000>>m))==0) return 29;
        else return 30;
}final public static String AnimalsYear(int y)//====== 传回农历 y年的生肖
{
        final String[] Animals=new String[] {"鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪"};
        return Animals[(y-4)%12];
}final public static String cyclicalm(int num)//====== 传入 月日的offset 传回干支, 0=甲子
{
        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]);
}final public static String cyclical(int y)//====== 传入 offset 传回干支, 0=甲子
{
        int num=y-1900+36;
        return (cyclicalm(num));
}final public long[] Lunar(int y,int m)//传出农历.year0 .month1 .day2 .yearCyl3 .monCyl4
                                        //       .dayCyl5 .isLeap6
{
        final int[] year20=new int[]{1,4,1,2,1,2,1,1,2,1,2,1};
        final int[] year19=new int[]{0,3,0,1,0,1,0,0,1,0,1,0};
        final int[] year2000=new int[]{0,3,1,2,1,2,1,1,2,1,2,1};
        long[] nongDate = new long[7];
        int i=0,temp=0,leap=0;
        Date baseDate =new Date(1900,1,31);
        Date objDate  =new Date(y,m,1);
        long offset = (objDate.getTime()-baseDate.getTime())/86400000L;
        if (y<2000) offset+=year19[m-1];
        if (y>2000) offset+=year20[m-1];
        if (y==2000) offset+=year2000[m-1];
        nongDate[5] = offset + 40;
        nongDate[4] = 14;
        for(i=1900; i<2050 && offset>0; i++) {
                temp = lYearDays(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 = leapDays((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;
        return nongDate;
}

Answer 2

final public static long[] calElement(int y,int m,int d)
//传出y年m月d日对应的农历.year0 .month1 .day2 .yearCyl3 .monCyl4 .dayCyl5 .isLeap6
{
        long[] nongDate = new long[7];
        int i=0,temp=0,leap=0;
        Date baseDate = new Date(0,0,31);
        Date objDate  = new Date(y-1900,m-1,d);
        long offset = (objDate.getTime()-baseDate.getTime())/86400000L;
        nongDate[5] = offset + 40;
        nongDate[4] = 14;
        for(i=1900; i<2050 && offset>0; i++) {
                temp = lYearDays(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 = leapDays((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;
        return nongDate;
}  public static String getchina(int day){
    String a = "";
    if(day==10)
      return "初十";
    int two = (int)((day)/10);
    if(two==0)
      a = "初";
    if(two==1)
      a = "十";
    if(two==2)
      a = "廿";
    if(two==2)
      a = "卅";
    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;
    }
    return a;
  }//传出y年m月d日对应的农历.year0 .month1 .day2 .yearCyl3 .monCyl4 .dayCyl5 .isLeap6
  public static void main(String[] args)
  {
    Calendar cld = Calendar.getInstance();
    int year = cld.get(Calendar.YEAR);
    int month = cld.get(Calendar.MONTH)+1;
    int day = cld.get(Calendar.DAY_OF_MONTH);
    String week = "";
    long[] l = calElement(year,month,day);
    switch(cld.get(Calendar.DAY_OF_WEEK)){
      case 1:week = "日";break;
      case 2:week = "一";break;
      case 3:week = "二";break;
      case 4:week = "三";break;
      case 5:week = "四";break;
      case 6:week = "五";break;
      case 7:week = "六";break;
    }
    String n = "";
    switch((int)(l[1])){
      case 1:n="一";break;
      case 2:n="二";break;
      case 3:n="三";break;
      case 4:n="四";break;
      case 5:n="五";break;
      case 6:n="六";break;
      case 7:n="七";break;
      case 8:n="八";break;
      case 9:n="九";break;
      case 10:n="十";break;
      case 11:n="十一";break;
      case 12:n="十二";break;
    }
    try {
      String a = "北京时间： "+year+"年"+month+"月"+day+"日
           星期"+week+"　农历"+n+"月"+getchina((int)(l[2]));
      String b = "北京时间： "+year+"年"+month+"月"+day+"日　星期"+week+"　农历"+n+"月"+getchina((int)(l[2]));
      BufferedWriter outout = new BufferedWriter(new FileWriter("rili.html",false));
      outout.write(a);
      System.out.println(a);
      outout.close();
    } catch (Exception e)    {e.printStackTrace();}
  }
}运行结果：
C:\java>java   NongLi
北京时间： 2007年2月5日<br/>星期一　农历十二月十八网上找了个代注释的，你看看还顶用？

Answer 3

"psyl" 这段代码我也看了，和我贴出来的那个没什么区别。上面只给了一个方法大概的注释，我想深入了解一下这个算法本身.
     “psyl”还有什么好意见没?
      谢谢！！！

Answer 4

public   class   LunarCalendar   {final   private   static   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   }; 关于这个我了解一点，这个是指闰年和闰的月份。0x04bd8 是1900年把0x04bd8转成二进制可以判断闰月在几月。
1-4位: 表示当年有无闰年，有的话，为闰月的月份，没有的话，为0。5-16位：为除了闰月外的正常月份是大月还是小月，1为30天，0为29天。            注意：从1月到12月对应的是第16位到第5位。17-20位： 表示闰月是大月还是小月，仅当存在闰月的情况下有意义其他没认真看。 希望有帮助。

Answer 5

还是有点不董
   比如0x04bd8转换成二进制是0000 0100 1011 1101 1000
   1-4位:   表示当年有无闰年，有的话，为闰月的月份，没有的话，为0。
       ( 这个还好理解）    5-16位：为除了闰月外的正常月份是大月还是小月，1为30天，0为29天。 
                        注意：从1月到12月对应的是第16位到第5位。
        （这个就不是很董0100 1011 1101，你这里说的1是指那个，0又是指那个）
   
    17-20位：   表示闰月是大月还是小月，仅当存在闰月的情况下有意义
         （这里表示是大月还是小月应该只有2种情况啊，怎么17-20位有好几种情况啊）  "psyl"如果有时间的话在帮忙解释一下，可以吗？
     谢谢！！！
   
  那位大侠知道也帮忙解释一下, 谢谢！！！