1. /**  
    2.  * 格式化时间  
    3.  *   
    4.  * @param  {time} 时间  
    5.  * @param  {cFormat} 格式  
    6.  * @return {String} 字符串  
    7.  *  
    8.  * @example formatTime('2018-1-29', '{y}/{m}/{d} {h}:{i}:{s}') // -> 2018/01/29 00:00:00  
    9.  */  
    10. formatTime(time, cFormat) { 
    11.     if (arguments.length === 0) return null  
    12.     if ((time + '').length === 10) {  
    13.         time = +time * 1000  
    14.     }  
    16.     var format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}', date  
    17.     if (typeof time === 'object') {  
    18.         date = time  
    19.     } else {  
    20.         date = new Date(time)  
    21.     }  
    23.     var formatObj = {  
    24.         y: date.getFullYear(),  
    25.         m: date.getMonth() + 1,  
    26.         d: date.getDate(),  
    27.         h: date.getHours(),  
    28.         i: date.getMinutes(),  
    29.         s: date.getSeconds(),  
    30.         a: date.getDay()  
    31.     } 
    33.     var time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {  
    34.         var value = formatObj[key]  
    35.         if (key === 'a') return ['一', '二', '三', '四', '五', '六', '日'][value - 1]  
    36.         if (result.length > 0 && value < 10) {  
    37.             value = '0' + value  
    38.         } 
    39.          return value || 0  
    40.     })  
    41.     return time_str  
    42. } 
    44. /**  
    45.  * 返回指定长度的月份集合  
    46.  *   
    47.  * @param  {time} 时间  
    48.  * @param  {len} 长度  
    49.  * @param  {direction} 方向：  1: 前几个月;  2: 后几个月;  3:前后几个月  默认 3  
    50.  * @return {Array} 数组  
    51.  *   
    52.  * @example   getMonths('2018-1-29', 6, 1)  // ->  ["2018-1", "2017-12", "2017-11", "2017-10", "2017-9", "2017-8", "2017-7"]  
    53.  */ 
    55. getMonths(time, len, direction) {  
    56.     var mm = new Date(time).getMonth(),  
    57.         yy = new Date(time).getFullYear(),  
    58.         direction = isNaN(direction) ? 3 : direction,  
    59.         index = mm;  
    60.     var cutMonth = function(index) {  
    61.         if ( index <= len && index >= -len) {  
    62.             return direction === 1 ? formatPre(index).concat(cutMonth(++index)):  
    63.                 direction === 2 ? formatNext(index).concat(cutMonth(++index)):formatCurr(index).concat(cutMonth(++index))  
    64.         }  
    65.         return []  
    66.     }  
    67.     var formatNext = function(i) {  
    68.         var y = Math.floor(i/12), 
    69.             m = i%12  
    70.         return [yy+y + '-' + (m+1)]  
    71.     } 
    73.     var formatPre = function(i) {  
    74.         var y = Math.ceil(i/12),  
    75.             m = i%12  
    76.         m = m===0 ? 12 : m  
    77.         return [yy-y + '-' + (13 - m)]  
    78.     }  
    79.     var formatCurr = function(i) {  
    80.         var y = Math.floor(i/12),  
    81.             yNext = Math.ceil(i/12),  
    82.             m = i%12,  
    83.             mNext = m===0 ? 12 : m  
    84.         return [yy-yNext + '-' + (13 - mNext),yy+y + '-' + (m+1)]  
    85.     } 
    86.     // 数组去重  
    87.     var unique = function(arr) {  
    88.         if ( Array.hasOwnProperty('from') ) {  
    89.             return Array.from(new Set(arr));  
    90.         }else{  
    91.             var n = {},r=[];   
    92.             for(var i = 0; i < arr.length; i++){  
    93.                 if (!n[arr[i]]){  
    94.                     n[arr[i]] = true;   
    95.                     r.push(arr[i]);  
    96.                 }  
    97.             }  
    98.             return r;  
    99.         }  
    100.     }  
    101.     return direction !== 3 ? cutMonth(index) : unique(cutMonth(index).sort(function(t1, t2){  
    102.         return new Date(t1).getTime() - new Date(t2).getTime()  
    103.     }))  
    104. }  
    106. /**  
    107.  * 返回指定长度的天数集合  
    108.  *   
    109.  * @param  {time} 时间 
    110.  * @param  {len} 长度  
    111.  * @param  {direction} 方向： 1: 前几天;  2: 后几天;  3:前后几天  默认 3  
    112.  * @return {Array} 数组  
    113.  *  
    114.  * @example date.getDays('2018-1-29', 6) // -> ["2018-1-26", "2018-1-27", "2018-1-28", "2018-1-29", "2018-1-30", "2018-1-31", "2018-2-1"]  
    115.  */  
    116. getDays(time, len, diretion) {  
    117.     var tt = new Date(time)  
    118.     var getDay = function(day) {  
    119.         var t = new Date(time)  
    120.         t.setDate(t.getDate() + day)  
    121.         var m = t.getMonth()+1  
    122.         return t.getFullYear()+'-'+m+'-'+t.getDate()  
    123.     }  
    124.     var arr = []  
    125.     if (diretion === 1) {  
    126.         for (var i = 1; i <= len; i++) {  
    127.             arr.unshift(getDay(-i))  
    128.         }  
    129.     }else if(diretion === 2) {  
    130.         for (var i = 1; i <= len; i++) {  
    131.             arr.push(getDay(i))  
    132.         } 
    133.      }else {  
    134.         for (var i = 1; i <= len; i++) {  
    135.             arr.unshift(getDay(-i))  
    136.         }  
    137.         arr.push(tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate())  
    138.         for (var i = 1; i <= len; i++) {  
    139.             arr.push(getDay(i))  
    140.         }  
    141.     }  
    142.     return diretion === 1 ? arr.concat([tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate()]) :  
    143.         diretion === 2 ? [tt.getFullYear()+'-'+(tt.getMonth()+1)+'-'+tt.getDate()].concat(arr) : arr  
    144. } 
    145. /**  
    146.  * @param  {s} 秒数  
    147.  * @return {String} 字符串   
    148.  *  
    149.  * @example formatHMS(3610) // -> 1h0m10s  
    150.  */  
    151. formatHMS (s) {  
    152.     var str = ''  
    153.     if (s > 3600) {  
    154.         str = Math.floor(s/3600)+'h'+Math.floor(s%3600/60)+'m'+s%60+'s' 
    155.     }else if(s > 60) {  
    156.         str = Math.floor(s/60)+'m'+s%60+'s'  
    157.     }else{ 
    158.          str = s%60+'s'  
    159.     }  
    160.     return str  
    161. }  
    163. /*获取某月有多少天*/  
    164. getMonthOfDay (time) {  
    165.     var date = new Date(time)  
    166.     var year = date.getFullYear()  
    167.     var mouth = date.getMonth() + 1  
    168.     var days  
    170.     //当月份为二月时，根据闰年还是非闰年判断天数  
    171.     if (mouth == 2) {  
    172.         days = year % 4 == 0 ? 29 : 28  
    173.     } else if (mouth == 1 || mouth == 3 || mouth == 5 || mouth == 7 || mouth == 8 || mouth == 10 || mouth == 12) {  
    174.         //月份为：1,3,5,7,8,10,12 时，为大月.则天数为31； 
    175.         days = 31  
    176.     } else {  
    177.         //其他月份，天数为：30.  
    178.         days = 30  
    179.     }  
    180.     return days  
    181. } 
    183. /*获取某年有多少天*/  
    184. getYearOfDay (time) {  
    185.     var firstDayYear = this.getFirstDayOfYear(time);  
    186.     var lastDayYear = this.getLastDayOfYear(time);  
    187.     var numSecond = (new Date(lastDayYear).getTime() - new Date(firstDayYear).getTime())/1000;  
    188.     return Math.ceil(numSecond/(24*3600));  
    189. } 
    190. /*获取某年的第一天*/  
    191. getFirstDayOfYear (time) {  
    192.     var year = new Date(time).getFullYear();  
    193.     return year + "-01-01 00:00:00";  
    194. }   
    196. /*获取某年最后一天*/  
    197. getLastDayOfYear (time) {  
    198.     var year = new Date(time).getFullYear();  
    199.     var dateString = year + "-12-01 00:00:00";  
    200.     var endDay = this.getMonthOfDay(dateString); 
    201.     return year + "-12-" + endDay + " 23:59:59";  
    202. } 
    204. /*获取某个日期是当年中的第几天*/  
    205. getDayOfYear (time) {  
    206.     var firstDayYear = this.getFirstDayOfYear(time); 
    207.     var numSecond = (new Date(time).getTime() - new Date(firstDayYear).getTime())/1000;  
    208.     return Math.ceil(numSecond/(24*3600));  
    209. }  
    211. /*获取某个日期在这一年的第几周*/  
    212. getDayOfYearWeek (time) {  
    213.     var numdays = this.getDayOfYear(time);  
    214.     return Math.ceil(numdays / 7);  
    215. }