阴历阳历换算
import java.text.ParseException; import java.text.simpledateformat; import java.util.calendar; import java.util.Date; public class ChinaDate { // private static final Logger logger = LoggerFactory.getLogger(CalendarUtil.class); // 计算阴历日期参照1900年到2049年 private final static int[] LUNAR_INFO = { 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 }; // 允许输入的最小年份 private final static int MIN_YEAR = 1900; // 允许输入的最大年份 private final static int MAX_YEAR = 2049; // 当年是否有闰月 private static boolean isLeapYear; // 阳历日期计算起点 private final static String START_DATE = "1900-01-30"; /** * 计算阴历 {@code year}年闰哪个月 1-12 , 没闰传回 0 * @param year 阴历年 * @return (int)月份 */ private static int getLeapMonth(int year) { return (int) (LUNAR_INFO[year - 1900] & 0xf); } /** * 计算阴历{@code year}年闰月多少天 * @param year 阴历年 * @return (int)天数 */ private static int getLeapMonthDays(int year) { if(getLeapMonth(year)!=0){ if((LUNAR_INFO[year - 1900] & 0xf0000)==0){ return 29; }else { return 30; } }else{ return 0; } } /** * 计算阴历{@code lunarYeay}年{@code month}月的天数 * @param lunarYeay 阴历年 * @param month 阴历月 * @return (int)该月天数 * @throws Exception */ private static int getmonthDays(int lunarYeay, int month) throws Exception { if ((month > 31) || (month < 0)) { throw(new Exception("月份有错！")); } // 0X0FFFF[0000 {1111 1111 1111} 1111]中间12位代表12个月，1为大月，0为小月 int bit = 1 << (16-month); if(((LUNAR_INFO[lunarYeay - 1900] & 0x0FFFF)&bit)==0){ return 29; }else { return 30; } } /** * 计算阴历{@code year}年的总天数 * @param year 阴历年 * @return (int)总天数 */ private static int getYearDays(int year) { int sum = 29*12; for(int i=0x8000;i>=0x8;i>>=1){ if((LUNAR_INFO[year-1900]&0xfff0&i)!=0){ sum++; } } return sum+getLeapMonthDays(year); } /** * 计算两个阳历日期相差的天数。计算不准确，已经废弃 * @param startDate 开始时间 * @param endDate 截至时间 * @return (int)天数 */ @Deprecated private static int daysBetween2(Date startDate, Date endDate) { long between_days=(endDate.getTime()-startDate.getTime())/(1000*3600*24); return integer.parseInt(String.valueOf(between_days)); } /** * 计算两个阳历日期相差的天数。 * @param startDate 开始时间 * @param endDate 截至时间 * @return (int)天数 */ private static int daysBetween(Date startDate, Date endDate) { int days = 0; //将转换的两个时间对象转换成Calendar对象 Calendar can1 = Calendar.getinstance(); can1.setTime(startDate); Calendar can2 = Calendar.getInstance(); can2.setTime(endDate); //拿出两个年份 int year1 = can1.get(Calendar.YEAR); int year2 = can2.get(Calendar.YEAR); //天数 Calendar can = null; //如果can1 < can2 //减去小的时间在这一年已经过了的天数 //加上大的时间已过的天数 if(can1.before(can2)){ days -= can1.get(Calendar.DAY_OF_YEAR); days += can2.get(Calendar.DAY_OF_YEAR); can = can1; }else{ days -= can2.get(Calendar.DAY_OF_YEAR); days += can1.get(Calendar.DAY_OF_YEAR); can = can2; } for (int i = 0; i < Math.abs(year2-year1); i++) { //获取小的时间当前年的总天数 days += can.getActualMaximum(Calendar.DAY_OF_YEAR); //再计算下一年。 can.add(Calendar.YEAR, 1); } return days; } /** * 检查阴历日期是否合法 * @param lunarYear 阴历年 * @param lunarMonth 阴历月 * @param lunarDay 阴历日 * @param leapMonthFlag 闰月标志 * @throws Exception */ private static void checkLunarDate(int lunarYear, int lunarMonth, int lunarDay, boolean leapMonthFlag) throws Exception { if ((lunarYear < MIN_YEAR) || (lunarYear > MAX_YEAR)) { throw(new Exception("非法农历年份！")); } if ((lunarMonth < 1) || (lunarMonth > 12)) { throw(new Exception("非法农历月份！")); } if ((lunarDay < 1) || (lunarDay > 30)) { // 中国的月最多30天 throw(new Exception("非法农历天数！")); } int leap = getLeapMonth(lunarYear);// 计算该年应该闰哪个月 if ((leapMonthFlag == true) && (lunarMonth != leap)) { throw(new Exception("非法闰月！")); } } /** * 阴历转换为阳历 * @param lunarDate 阴历日期,格式YYYYMMDD * @param leapMonthFlag 是否为闰月 * @return 阳历日期,格式：YYYYMMDD * @throws Exception */ public static String lunarToSolar(String lunarDate, boolean leapMonthFlag) throws Exception{ int lunarYear = Integer.parseInt(lunarDate.substring(0, 4)); int lunarMonth = Integer.parseInt(lunarDate.substring(4, 6)); int lunarDay = Integer.parseInt(lunarDate.substring(6, 8)); checkLunarDate(lunarYear, lunarMonth, lunarDay, leapMonthFlag); int offset = 0; for (int i = MIN_YEAR; i < lunarYear; i++) { int yearDaysCount = getYearDays(i); // 求阴历某年天数 offset += yearDaysCount; } //计算该年闰几月 int leapMonth = getLeapMonth(lunarYear); if(leapMonthFlag & leapMonth != lunarMonth){ throw(new Exception("您输入的闰月标志有误！")); } //当年没有闰月或月份早于闰月或和闰月同名的月份 if(leapMonth==0|| (lunarMonth < leapMonth) || (lunarMonth==leapMonth && !leapMonthFlag)){ for (int i = 1; i < lunarMonth; i++) { int tempMonthDaysCount = getMonthDays(lunarYear, i); offset += tempMonthDaysCount; } // 检查日期是否大于最大天 if (lunarDay > getMonthDays(lunarYear, lunarMonth)) { throw(new Exception("不合法的农历日期！")); } offset += lunarDay; // 加上当月的天数 }else{//当年有闰月，且月份晚于或等于闰月 for (int i = 1; i < lunarMonth; i++) { int tempMonthDaysCount = getMonthDays(lunarYear, i); offset += tempMonthDaysCount; } if (lunarMonth>leapMonth) { int temp = getLeapMonthDays(lunarYear); // 计算闰月天数 offset += temp; // 加上闰月天数 if (lunarDay > getMonthDays(lunarYear, lunarMonth)) { throw(new Exception("不合法的农历日期！")); } offset += lunarDay; }else { // 如果需要计算的是闰月，则应首先加上与闰月对应的普通月的天数 // 计算月为闰月 int temp = getMonthDays(lunarYear, lunarMonth); // 计算非闰月天数 offset += temp; if (lunarDay > getLeapMonthDays(lunarYear)) { throw(new Exception("不合法的农历日期！")); } offset += lunarDay; } } SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd"); Date myDate = null; myDate = formatter.parse(START_DATE); Calendar c = Calendar.getInstance(); c.setTime(myDate); c.add(Calendar.DATE, offset); myDate = c.getTime(); return formatter.format(myDate); } /** * 阳历日期转换为阴历日期 * @param solarDate 阳历日期,格式YYYYMMDD * @return 阴历日期 * @throws Exception */ public static String solarToLunar(String solarDate, Boolean isFormat) throws Exception{ int i; int temp = 0; int lunarYear; int lunarMonth; //农历月份 int lunarDay; //农历当月第几天 boolean leapMonthFlag =false; SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd"); Date myDate = null; Date startDate = null; try { myDate = formatter.parse(solarDate); startDate = formatter.parse(START_DATE); } catch (ParseException e) { e.printstacktrace(); } int offset = daysBetween(startDate,myDate); for (i = MIN_YEAR; i <= MAX_YEAR; i++){ temp = getYearDays(i); //求当年农历年天数 if (offset - temp < 1){ break; }else{ offset -= temp; } } lunarYear = i; int leapMonth = getLeapMonth(lunarYear);//计算该年闰哪个月 //设定当年是否有闰月 if (leapMonth > 0){ isLeapYear = true; }else{ isLeapYear = false; } for (i = 1; i<=12; i++) { if(i==leapMonth+1 && isLeapYear){ temp = getLeapMonthDays(lunarYear); isLeapYear = false; leapMonthFlag = true; i--; }else{ temp = getMonthDays(lunarYear, i); } offset -= temp; if(offset<=0){ break; } } offset += temp; lunarMonth = i; lunarDay = offset; if(isFormat) return "阴历："+lunarYear+"年"+(leapMonthFlag&(lunarMonth==leapMonth)?"闰":"")+lunarMonth+"月"+lunarDay+"日"; return "" + lunarYear + lunarMonth + lunarDay; } public static void main(String[] args) throws Exception { System.out.println(ChinaDate.lunarToSolar("1990-12-04", false)); System.out.println(ChinaDate.lunarToSolar("1984-10-21", true)); System.out.println(ChinaDate.lunarToSolar("1990-12-25", false)); System.out.println("************"); System.out.println(ChinaDate.solarToLunar("1900-09-23", true)); System.out.println(ChinaDate.solarToLunar("1900-09-24", true)); System.out.println(ChinaDate.solarToLunar("1900-10-22", true)); System.out.println(ChinaDate.solarToLunar("1900-10-23", true)); System.out.println(ChinaDate.solarToLunar("1991-02-09", true)); System.out.println(ChinaDate.solarToLunar("1990-06-30", true)); System.out.println(ChinaDate.solarToLunar("1984-12-13", true)); System.out.println(ChinaDate.solarToLunar("1991-01-19", true)); } }
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