JS对日期封装使用，采用正则匹配日期结构进行显示日期。

/*** 字符串转化为日期对象======》 调用格式为：str.format2Date("yyyy-MM-dd hh:mm:ss")* @param {str} 传入特殊格式* @return {Date}* */
String.prototype.format2Date = function(style, option) {if (style) {let y = style.match("[Yy]{2,4}");let M = style.match("M{1,2}");let d = style.match("d{1,2}");let h = style.match("h{1,2}");let m = style.match("m{1,2}");let s = style.match("s{1,2}");let year = this.substring(y.index, y.index+y[0].length);let month = this.substring(M.index, M.index+M[0].length);let day = this.substring(d.index, d.index+d[0].length);let hour = h != null?this.substring(h.index, h.index+h[0].length):'00';let minute = m != null?this.substring(m.index, m.index+m[0].length):'00';let second = s != null?this.substring(s.index, s.index+s[0].length):'00';return new Date(year+"/"+month+"/"+day+"  "+hour+":"+minute+":"+second)} else {return new Date(this);}
};/*** 时间日期格式化======》 调用格式为：date.format2String("yyyy-MM-dd hh:mm:ss")* @param {[type]} style 时间格式字符串* @returns {String}*/
Date.prototype.format2String = function(style, option) {var o = {"[Yy]{2,4}" : this.getFullYear(),   //year"M{1,2}" : this.getMonth() + 1,     //month"d{1,2}" : this.getDate(),          //day"H{1,2}" : this.getHours(),         //hour"h{1,2}" : this.getHours()%24,      //hour"m{1,2}" : this.getMinutes(),       //minute"s{1,2}" : this.getSeconds(),       //second"[Ee]" : this.getDay(),             //day in week"[Ww]" : this.getDay(),             //day in week"[Qq]" : Math.floor((this.getMonth()+3)/3),  //quarter"S{3}|S{1}" : this.getMilliseconds()//millisecond};for(var k in o ){style = style.replace(new RegExp("("+ k +")"), function(match, g, offset, string){return ("0".repeat(match.length)+o[k]).substr( (""+o[k]).length );})}return style;
};/*** 日期相减函数* @param {date } 计算相减日期（传入日期无先后顺序）** */
Date.prototype.dateSubtraction = function(date = new Date()) {var start = Date.parse(new Date(this.replace(/-|\/|\,/g, "\/")));var end = Date.parse(new Date(date.replace(/-|\/|\,/g, "\/")));if (start > end) {return parseInt((this.getTime() - date.getTime()) / (1000 * 60 * 60 * 24));} else {return parseInt((date.getTime() - this.getTime()) / (1000 * 60 * 60 * 24));}
};/*** 年：加/减* @param type 计算类型（1：相加，2：相减）* @param {day} 相加或者相减天数** */
Date.prototype.yearCompute = function(type, day = 1) {var date = new Date(this);switch (type) {case 1: {date.setFullYear(parseInt(this.getFullYear() + day));console.log("12313", date);return date;}case 2: {date.setFullYear(parseInt(this.getFullYear() - day));return date;}}
};/*** 月：加/减* @param type 计算类型（1：相加，2：相减）* @param {month} 相加或者相减天数** */
Date.prototype.monthCompute = function(type, month = 1) {var date = new Date(this);switch (type) {case 1: {date.setMonth(parseInt(this.getMonth() + month));return date;}case 2: {date.setMonth(parseInt(this.getMonth() - month));return date;}}
};/*** 天：加/减* @param type 计算类型（1：相加，2：相减）* @param {day} 相加或者相减天数** */
Date.prototype.dayCompute = function(type, day = 1) {var date = new Date(this);switch (type) {case 1: {date.setDate(parseInt(this.getDate() + day));return date;}case 2: {date.setDate(parseInt(this.getDate() - day));return date;}}
};/*** 小时：加/减* @param type 计算类型（1：相加，2：相减）* @param {hour} 相加或者相减小时** */
Date.prototype.hourCompute = function(type, hour = 1) {var date = new Date(this);switch (type) {case 1: {date.setHours(parseInt(this.getHours() + hour));return date;}case 2: {date.setHours(this.getHours() - hour);return date;}}
};/*** 分钟：加/减* @param type 计算类型（1：相加，2：相减）* @param {minute} 相加或者相减小时** */
Date.prototype.minuteCompute = function(type, minute = 1) {var date = new Date(this);switch (type) {case 1: {date.setMinutes(parseInt(this.getMinutes() + minute));return date;}case 2: {date.setMinutes(this.getMinutes() - minute);return date;}}
};/*** 秒钟：加/减* @param type 计算类型（1：相加，2：相减）* @param {second} 相加或者相减小时** */
Date.prototype.secondCompute = function(type, second = 1) {var date = new Date(this);switch (type) {case 1: {date.setSeconds(parseInt(this.getSeconds() + second));return date;}case 2: {date.setSeconds(parseInt(this.getSeconds() - second));return date;}}
};/*** 毫秒：加/减* @param type 计算类型（1：相加，2：相减）* @param {millisecond} 相加或者相减小时** */
Date.prototype.millisecondCompute = function(type, millisecond = 1) {var date = new Date(this);switch (type) {case 1: {date.setMilliseconds(parseInt(this.getMilliseconds() + millisecond));return date;}case 2: {date.setMilliseconds(parseInt(this.getMilliseconds() - millisecond));return date;}}
};