javascript 日期 新曆 農曆 生肖 農曆節慶 總結

因爲最近項目需要用js做一個日曆控件，所以到網上去搜了一些算法，自己根據這些算法也做了一些優化，今天總結一下，以便日後使用，感謝原作者

//新曆日期
var today = new Date();
//年
var year = today.getFullYear()<100 ? today.getFullYear()+1900:today.getFullYear()
//當前月
var month = today.getMonth + 1;
//日
var day = today.getDate();

//DateGL = new Date();

//得到農曆 年
function CnYearofDate(DateGL){
	var YYYY=DateGL.getFullYear();
	var MM=DateGL.getMonth()+1;
	var CnMM=parseInt(Math.abs(CnDateofDate(DateGL))/100);
	if(YYYY<100) YYYY+=1900;
	if(CnMM>MM) YYYY--;
	YYYY-=1864;
	return CnEra(YYYY)+"年";
}

function CnEra(YYYY){
	var Tiangan=new Array("甲","乙","丙","丁","戊","己","庚","辛","壬","癸");
	//var Dizhi=new Array("子(鼠)","醜(牛)","寅(虎)","卯(兔)","辰(龍)","巳(蛇)",
	//"午(馬)","未(羊)","申(猴)","酉(雞)","戌(狗)","亥(豬)");
	var Dizhi=new Array("子","醜","寅","卯","辰","巳","午","未","申","酉","戌","亥");
	return Tiangan[YYYY%10]+Dizhi[YYYY%12];
}

//得到農曆 月
function CnMonthofDate(DateGL){
	var CnMonthStr=new Array("零","正","二","三","四","五","六","七","八","九","十","冬","臘");
	var Month;
	Month = parseInt(CnDateofDate(DateGL)/100);
	
	if (Month < 0){return "閏" + CnMonthStr[-Month] + "月";}
	else{return CnMonthStr[Month] + "月";}
}

//得到農曆 日
function CnDayofDate(DateGL){
	var CnDayStr=new Array("零",
	"初一", "初二", "初三", "初四", "初五",
	"初六", "初七", "初八", "初九", "初十",
	"十一", "十二", "十三", "十四", "十五",
	"十六", "十七", "十八", "十九", "二十",
	"廿一", "廿二", "廿三", "廿四", "廿五",
	"廿六", "廿七", "廿八", "廿九", "三十");
	var Day;
	Day = (Math.abs(CnDateofDate(DateGL)))%100;
	return CnDayStr[Day];
}

//得到農曆節慶
function SolarTerm(DateGL){
	var SolarTermStr=new Array(
		"小寒","大寒","立春","雨水","驚蟄","春分",
		"清明","穀雨","立夏","小滿","芒種","夏至",
		"小暑","大暑","立秋","處暑","白露","秋分",
		"寒露","霜降","立冬","小雪","大雪","冬至");
	var DifferenceInMonth=new Array(
		1272060,1275495,1281180,1289445,1299225,1310355,
		1321560,1333035,1342770,1350855,1356420,1359045,
		1358580,1355055,1348695,1340040,1329630,1318455,
		1306935,1297380,1286865,1277730,1274550,1271556);
	var DifferenceInYear=31556926;
	var BeginTime=new Date(1901/1/1);
	BeginTime.setTime(947120460000);
	for(;DateGL.getFullYear()<BeginTime.getFullYear();){
		BeginTime.setTime(BeginTime.getTime()-DifferenceInYear*1000);
	}
	for(;DateGL.getFullYear()>BeginTime.getFullYear();){
		BeginTime.setTime(BeginTime.getTime()+DifferenceInYear*1000);
	}
	for(var M=0;DateGL.getMonth()>BeginTime.getMonth();M++){
		BeginTime.setTime(BeginTime.getTime()+DifferenceInMonth[M]*1000);
	}
	if(DateGL.getDate()>BeginTime.getDate()){
		BeginTime.setTime(BeginTime.getTime()+DifferenceInMonth[M]*1000);
		M++;
	}
	if(DateGL.getDate()>BeginTime.getDate()){
		BeginTime.setTime(BeginTime.getTime()+DifferenceInMonth[M]*1000);
		M==23?M=0:M++;
	}
	var JQ='';
	if(DateGL.getDate()==BeginTime.getDate()){
		JQ= SolarTermStr[M] + "";
	}
	return JQ;
}

function CnDateofDate(DateGL){
	var CnData=new Array(
		0x16,0x2a,0xda,0x00,0x83,0x49,0xb6,0x05,0x0e,0x64,0xbb,0x00,0x19,0xb2,0x5b,0x00,
		0x87,0x6a,0x57,0x04,0x12,0x75,0x2b,0x00,0x1d,0xb6,0x95,0x00,0x8a,0xad,0x55,0x02,
		0x15,0x55,0xaa,0x00,0x82,0x55,0x6c,0x07,0x0d,0xc9,0x76,0x00,0x17,0x64,0xb7,0x00,
		0x86,0xe4,0xae,0x05,0x11,0xea,0x56,0x00,0x1b,0x6d,0x2a,0x00,0x88,0x5a,0xaa,0x04,
		0x14,0xad,0x55,0x00,0x81,0xaa,0xd5,0x09,0x0b,0x52,0xea,0x00,0x16,0xa9,0x6d,0x00,
		0x84,0xa9,0x5d,0x06,0x0f,0xd4,0xae,0x00,0x1a,0xea,0x4d,0x00,0x87,0xba,0x55,0x04
	);
	var CnMonth=new Array();
	var CnMonthDays=new Array();
	var CnBeginDay;
	var LeapMonth;
	var Bytes=new Array();
	var I;
	var CnMonthData;
	var DaysCount;
	var CnDaysCount;
	var ResultMonth;
	var ResultDay;
	var yyyy = DateGL.getFullYear();
	var mm=DateGL.getMonth()+1;
	var dd=DateGL.getDate();
	if(yyyy<100) yyyy+=1900;
	if ((yyyy < 1997) || (yyyy > 2020)){
		return 0;
	}
	Bytes[0] = CnData[(yyyy - 1997) * 4];
	Bytes[1] = CnData[(yyyy - 1997) * 4 + 1];
	Bytes[2] = CnData[(yyyy - 1997) * 4 + 2];
	Bytes[3] = CnData[(yyyy - 1997) * 4 + 3];
	if ((Bytes[0] & 0x80) != 0) {CnMonth[0] = 12;}
	else {CnMonth[0] = 11;}
	CnBeginDay = (Bytes[0] & 0x7f);
	CnMonthData = Bytes[1];
	CnMonthData = CnMonthData << 8;
	CnMonthData = CnMonthData | Bytes[2];
	LeapMonth = Bytes[3];
	for (I=15;I>=0;I--){
	CnMonthDays[15 - I] = 29;
	if (((1 << I) & CnMonthData) != 0 ){
	CnMonthDays[15 - I]++;}
	if (CnMonth[15 - I] == LeapMonth ){
	CnMonth[15 - I + 1] = - LeapMonth;}
	else{
	if (CnMonth[15 - I] < 0 ){CnMonth[15 - I + 1] = - CnMonth[15 - I] + 1;}
	else {CnMonth[15 - I + 1] = CnMonth[15 - I] + 1;}
	if (CnMonth[15 - I + 1] > 12 ){ CnMonth[15 - I + 1] = 1;}
	}
	}
	DaysCount = DaysNumberofDate(DateGL) - 1;
	if (DaysCount <= (CnMonthDays[0] - CnBeginDay)){
	if ((yyyy > 1901) && (CnDateofDate(new Date((yyyy - 1)+"/12/31")) < 0)){
	ResultMonth = - CnMonth[0];}
	else {ResultMonth = CnMonth[0];}
	ResultDay = CnBeginDay + DaysCount;
	}
	else{
	CnDaysCount = CnMonthDays[0] - CnBeginDay;
	I = 1;
	while ((CnDaysCount < DaysCount) && (CnDaysCount + CnMonthDays[I] < DaysCount)){
	CnDaysCount+= CnMonthDays[I];
	I++;
	}
	ResultMonth = CnMonth[I];
	ResultDay = DaysCount - CnDaysCount;
	}
	if (ResultMonth > 0){
	return ResultMonth * 100 + ResultDay;}
	else{return ResultMonth * 100 - ResultDay;}
}

//生肖
//yyyy 年份
function getShengxiao(yyyy){
  var arr=['猴','雞','狗','豬','鼠','牛','虎','兔','龍','蛇','馬','羊'];
  return /^\d{4}$/.test(yyyy)?arr[yyyy%12]:null;
} 

目前就總結了這一部份，有空再補充，再次感謝原作者