java 农历计算方式

package my.ertpassword;

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)];
}
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]+Zhi[num]);
}
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;
}

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 "10";
     int two = (int)((day)/10);
     if(two==0)
       a = "0";
     if(two==1)
       a = "1";
     if(two==2)
       a = "2";
     if(two==3)
       a = "3";
     int one = (int)(day);
     switch(one){
       case 1:a += "1";break;
       case 2:a += "2";break;
       case 3:a += "3";break;
       case 4:a += "4";break;
       case 5:a += "5";break;
       case 6:a += "6";break;
       case 7:a += "7";break;
       case 8:a += "8";break;
       case 9:a += "9";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 String er(String date){
    Calendar cld = Calendar.getInstance();
      int year =Integer.parseInt(date.substring(0, 4));
      int month = Integer.parseInt(date.substring(5, 7));
      int day =  Integer.parseInt(date.substring(8, 10));
      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="1";break;
        case 2:n="2";break;
        case 3:n="3";break;
        case 4:n="4";break;
        case 5:n="5";break;
        case 6:n="6";break;
        case 7:n="7";break;
        case 8:n="8";break;
        case 9:n="9";break;
        case 10:n="10";break;
        case 11:n="11";break;
        case 12:n="12";break;
      }
      String a="";
      try {
        //String a = "北京时间： "+year+"-"+month+"-"+day+"日            星期"+week+"　农历"+year+"-"+n+"-"+getchina((int)(l[2]));
        //String b = "北京时间： "+year+"-"+month+"-"+day+"日　星期"+week+"　农历"+n+"月"+getchina((int)(l[2]));
       if(Integer.parseInt(n)<10){
        n="0"+n;
       }
       a = year+"-"+n+"-"+getchina((int)(l[2]));
      } catch (Exception e)     {e.printStackTrace();}
  return a;
    }
}
//调用方法 NongLi.er(date);