Java-获取年月日对应的天干地支

  1 public class MyDate {
  2     /**
  3      * 对于年月日的天干地支
  4      */
  5     private int year_ganZhi;
  6     private int month_ganZhi;
  7     private int day_ganZhi;
  8     /**
  9      * 关于阴历的相关信息
 10      */
 11     private static int[] lunar_info = {0x04bd8, 0x04ae0, 0x0a570, 0x054d5,
 12             0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0, 0x055d2, 0x04ae0,
 13             0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540, 0x0d6a0, 0x0ada2,
 14             0x095b0, 0x14977, 0x04970, 0x0a4b0, 0x0b4b5, 0x06a50, 0x06d40,
 15             0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970, 0x06566, 0x0d4a0,
 16             0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3, 0x092e0, 0x1c8d7,
 17             0x0c950, 0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0, 0x1a5b4, 0x025d0,
 18             0x092d0, 0x0d2b2, 0x0a950, 0x0b557, 0x06ca0, 0x0b550, 0x15355,
 19             0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8, 0x0e950, 0x06aa0,
 20             0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570, 0x05260, 0x0f263,
 21             0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5, 0x04ad0, 0x0a4d0,
 22             0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0, 0x195a6, 0x095b0,
 23             0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50, 0x06d40, 0x0af46,
 24             0x0ab60, 0x09570, 0x04af5, 0x04970, 0x064b0, 0x074a3, 0x0ea50,
 25             0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0, 0x0c960, 0x0d954,
 26             0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7, 0x025d0, 0x092d0,
 27             0x0cab5, 0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50, 0x055d9, 0x04ba0,
 28             0x0a5b0, 0x15176, 0x052b0, 0x0a930, 0x07954, 0x06aa0, 0x0ad50,
 29             0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260, 0x0ea65, 0x0d530,
 30             0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0, 0x0a4d0, 0x1d0b6,
 31             0x0d250, 0x0d520, 0x0dd45, 0x0b5a0, 0x056d0, 0x055b2, 0x049b0,
 32             0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20, 0x0ada0};
 33     /**
 34      * 记录天干的信息
 35      */
 36     private String[] gan_info = {"甲", "乙", "丙", "丁", "戊", "己", "庚", "辛",
 37             "壬", "癸"};
 38     private String[] zhi_info = {"子", "丑", "寅", "卯", "辰", "巳", "午", "未",
 39             "申", "酉", "戌", "亥"};
 40     /**
 41      * 单例模式
 42      */
 43     private static volatile MyDate instance = null;
 44     private MyDate() {
 45     }
 46 
 47     public static MyDate getInstance() {
 48         if (instance == null) {
 49             synchronized (MyDate.class) {
 50                 if (instance == null) {
 51                     instance = new MyDate();
 52                 }
 53             }
 54         }
 55         return instance;
 56     }
 57 
 58     /**
 59      * 获取农历某年的总天数
 60      *
 61      * @param year
 62      * @return
 63      */
 64     private int daysOfYear(int year) {
 65         int sum = 348;
 66         for (int i = 0x8000; i > 0x8; i >>= 1) {
 67             sum += (lunar_info[year - 1900] & i) == 0 ? 0 : 1;
 68         }
 69         //获取闰月的天数
 70         int daysOfLeapMonth;
 71         if ((lunar_info[year - 1900] & 0xf) != 0) {
 72             daysOfLeapMonth = (lunar_info[year - 1900] & 0x10000) == 0 ? 29 : 30;
 73         } else {
 74             daysOfLeapMonth = 0;
 75         }
 76         return sum + daysOfLeapMonth;
 77     }
 78 
 79     /**
 80      * 初始化年月日对应的天干地支
 81      * @param year
 82      * @param month
 83      * @param day
 84      */
 85     public void initGanZhi(int year, int month, int day) {
 86         //获取现在的时间
 87         Calendar calendar_now = Calendar.getInstance();
 88         calendar_now.set(year, month - 1, day);
 89         long date_now = calendar_now.getTime().getTime();
 90         //获取1900-01-31的时间
 91         Calendar calendar_ago = Calendar.getInstance();
 92         calendar_ago.set(1900, 0 ,31);
 93         long date_ago = calendar_ago.getTime().getTime();
 94         //86400000 = 24 * 60 * 60 * 1000
 95         long days_distance = (date_now - date_ago) / 86400000L;
 96         float remainder = (date_now - date_ago) % 86400000L;
 97         //余数大于0算一天
 98         if (remainder > 0) {
 99             days_distance += 1;
100         }
101         //都是从甲子开始算起以1900-01-31为起点
102         //1899-12-21是农历1899年腊月甲子日  40：相差1900-01-31有40天
103         day_ganZhi = (int)days_distance + 40;
104         //1898-10-01是农历甲子月  14：相差1900-01-31有14个月
105         month_ganZhi = 14;
106         int daysOfYear = 0;
107         int i;
108         for (i = 1900; i < 2050 && days_distance > 0; i++) {
109             daysOfYear = daysOfYear(i);
110             days_distance -= daysOfYear;
111             month_ganZhi += 12;
112         }
113         if (days_distance < 0) {
114             days_distance += daysOfYear;
115             i--;
116             month_ganZhi -= 12;
117         }
118         //农历年份
119         int myYear = i;
120         //1864年是甲子年
121         year_ganZhi = myYear - 1864;
122         //哪个月是闰月
123         int leap = lunar_info[myYear - 1900] & 0xf;
124         boolean isLeap = false;
125         int daysOfLeapMonth = 0;
126         for (i = 1; i < 13 && days_distance > 0; i++) {
127             //闰月
128             if (leap > 0 && i == (leap + 1) && !isLeap) {
129                 isLeap = true;
130                 if ((lunar_info[myYear - 1900] & 0xf) != 0) {
131                     daysOfLeapMonth = (lunar_info[myYear - 1900] & 0x10000) == 0 ? 29 : 30;
132                 } else {
133                     daysOfLeapMonth = 0;
134                 }
135                 --i;
136             } else {
137                 daysOfLeapMonth = (lunar_info[myYear - 1900] & (0x10000 >> i)) == 0 ? 29 : 30;
138             }
139             //设置非闰月
140             if (isLeap && i == (leap + 1)) {
141                 isLeap = false;
142             }
143             days_distance -= daysOfLeapMonth;
144             if (!isLeap) {
145                 month_ganZhi++;
146             }
147         }
148         if (days_distance == 0 && leap > 0 && i == leap + 1 && !isLeap) {
149             --month_ganZhi;
150         }
151         if (days_distance < 0) {
152             --month_ganZhi;
153         }
154     }
155 
156     /**
157      * 将年月日转化为天干地支的显示方法
158      * @param index
159      * @return
160      */
161     private String ganZhi(int index) {
162         return gan_info[index % 10] + zhi_info[index % 12];
163     }
164 
165     /**
166      * 获取天干地支
167      * @return
168      */
169     public String getGanZhi() {
170         return "农历" + ganZhi(year_ganZhi) + "年 " + ganZhi(month_ganZhi) + "月 " + ganZhi(day_ganZhi) + "日";
171     }
172 }