插件_日期_lunar-calendar公历农历转换

现在存在某需求，需要将公历、农历日期进行相互转换，在此借助lunar-calendar插件完成。

下载

• [1] 通过npm安装

  npm install lunar-calendar
  

• [2]通过文件方式引入

  <script type="text/javascript" src="lib/LunarCalendar.min.js"></script>
  

  此处我下载了LunarCalendar.min.js文件引入

   /**
   * 农历（阴历）万年历
   * LunarCalendar；NPM NAME:lunar-calendar
   * vervison : v0.1.4
   * Github : https://github.com/zzyss86/LunarCalendar
   * HomePage : http://www.tuijs.com/
   * Author : JasonZhou
   * Email : [email protected]
   */
   !function(){function a(a){var b=H[a-B];return b[0]}function b(a){for(var b=H[a-B],c=b[0],d=b[3].toString(2),e=d.split(""),f=0;f<16-e.length;f++)e.unshift(0);for(var g=c?13:12,h=0,i=[],f=0;g>f;f++)0==e[f]?(h+=29,i.push(29)):(h+=30,i.push(30));return{yearDays:h,monthDays:i}}function c(a,c){for(var d=b(a),e=c>0?c:d.yearDays-Math.abs(c),f=d.monthDays,g=0,h=0,i=0;i<f.length;i++)if(g+=f[i],g>e){h=i,g-=f[i];break}return[a,h,e-g+1]}function d(a,b,d){var f=H[a-B],g=f[1],h=f[2],i=e(a,g-1,h,a,b,d);if(0==i)return[a,0,1];var j=i>0?a:a-1;return c(j,i)}function e(a,b,c,d,e,f){var g=new Date(a,b,c).getTime(),h=new Date(d,e,f).getTime();return(h-g)/864e5}function f(a,c,d){for(var e=b(a),f=e.monthDays,g=0,h=0;h<f.length&&c>h;h++)g+=f[h];return g+d-1}function g(a,b){var c=new Date(31556925974.7*(a-1890)+6e4*I[b]+Date.UTC(1890,0,5,16,2,31));return c.getUTCDate()}function h(a){for(var b={},c=0,d=0;24>d;d++){var e=g(a,d);d%2==0&&c++,b[A(c-1,e)]=D.solarTerm[d]}return b}function i(a){var b=a-1890+25;return 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define?define(function(){return J}):"object"==typeof exports?module.exports=J:window.LunarCalendar=J}();
  

使用

引入js文件之后，在window全局对象上添加了LunarCalendar对象，公农历转化的方法就是该对象的属性，可以全局作用域直接调用。

将公历转换为农历

语法

/* 
  @param {Number} year 公历年 范围[1891-2100]
  @param {Number} month 公历月 范围[1-12]
  @param {Number} day 公历日 范围[1-31]
*/
LunarCalendar.solarToLunar(year,month,day)

返回值

举例说明

const obj = window.LunarCalendar.solarToLunar(2023, 10,1)
console.log(`今天的农历日期是${obj.lunarYear}年${obj.lunarMonthName}${obj.lunarDayName}日` ) // 今天的农历日期是2023年八月十七日
console.log(`今天是${obj.solarFestival}`) // 今天是国庆节 世界音乐日 国际老人节

将农历转换为公历

语法

/*
  @param {Number} year 农历年 范围[1891-2100]
  @param {Number} month 农历月 范围[1-13]（有闰月情况，比如当前闰9月，10表示闰9月，11表示10月）
  @param {Number} day 农历日 范围[1-30]
*/
LunarCalendar.lunarToSolar(year,month,day)

返回值

问题-month参数值

因为农历存在闰月的情况，因此month在传旨时的取值范围是1-13。

在进行转换时需要先知道今年哪月是闰月！month的参数值是否要+1？

举例说明

window.LunarCalendar.lunarToSolar(2023, 8,17)

如上 农历8月17日转化为公历为10月1日，但是结果为9月1日！

原因是在2023年润2月！

正确流程

• [1] 先获取今年润几月
• [2] 确定month传值
• 示例

  function lunarToSolar(year, month, day) {
    const { lunarLeapMonth } = LunarCalendar.calendar(year,month).monthData[0] // 润几月
    return window.LunarCalendar.lunarToSolar(year, month > lunarLeapMonth ? month+1 : month  ,day)
  }
  const date = lunarToSolar(2023, 8, 17)
  console.log(`今天公历日期为${date.year}年${date.month}月${date.day}日`) // 今天公历日期为2023年10月1日