JS对时间的操作

String.prototype.padingStar=function(totalLength,padingStr="") { if (totalLength <= this.length) { return this; } var padLength = totalLength - this.length; if (padLength <= padingStr.length) { return padingStr.substring(0, padLength) + this; } else { var len = padLength / padingStr.length, n = 1,str=''; while (n<len) { str += padingStr; n++; } return str + padingStr.substring(0, padLength - (n-1) * padingStr.length) +this; } } String.prototype.padingEnd = function (totalLength, padingStr="") { //在开始的补全后面 if (totalLength <= this.length) { return this; } var padLength = totalLength - this.length; if (padLength <= padingStr.length) { return padingStr.substring(0, padLength) + this; } else { var len = padLength / padingStr.length, n = 0,str=''; while (n<len) { str += padingStr; n++; } return this + padingStr.substring(0, padLength - (n - 1) * padingStr.length)+str; } } //获取当前月的开始 Date.prototype.starOfMonth=function() { return new Date(this.getFullYear(), this.getMonth(), 1, 00, 00, 00); } //获取当前月的结束 Date.prototype.endOfMonth=function() { return new Date(this.getFullYear(), this.getMonth() + 1, 0, 23, 59, 59); } //获取当前季度的开始时间 Date.prototype.starofQuarter=function() { return new Date(this.getFullYear(), (this.getQuarter() - 1) * 3, 01, 00, 00, 00); } //获取当前季度的结束时间 Date.prototype.endofQuarter=function() { return new Date(this.getFullYear(), this.getQuarter() * 3-1 , 31, 23, 59, 59); } //获取当前时间对应的季度 Date.prototype.getQuarter=function() { return Math.ceil((this.getMonth() + 1) / 3); } //获取当前时间对应的年的开始 Date.prototype.starOfYear=function() { return new Date(this.getFullYear(), 01, 01, 00, 00, 00); } //获取当前时间对应年的结束 Date.prototype.endOfYear=function() { return new Date(this.getFullYear(), 12, 31, 23, 59, 59); } //把时间格式化为字符串 Date.prototype.toDateString = function(format) { if (typeof (format) == "undefined") { return this.toString(); } //可能我的第一个想法，就是 if (/y{4}/.test(format)) { format = format.replace(/yyyy/g, this.getFullYear()); } if (/y{2}/.test(format)) { format = format.replace(/y{2}/g,this.getFullYear().toString().substr(2)); } if (/M{2}/.test(format)) { format = format.replace(/MM/,this.getMonth().toString().padingStar(2,0)); } if (/dd/.test(format)) { format = format.replace(/dd/,this.getDate().toString().padingStar(2,'0')); } if (/HH/.test(format)) { format = format.replace(/HH/g, this.getHours().toString().padingStar(2, '0')); } if (/hh/.test(format)) { format = format.replace(/hh/g, (hour < 12 ? hour : hour - 12).toString().padingStar(2, '0')); } if (/mm/.test(format)) { format = format.replace(/mm/g, this.getMinutes().toString().padStart(2, '0')); } if (/ss/.test(format)) { format = format.replace(/ss/g, this.getSeconds().toString().padStart(2, '0')); } return format; } //获取两个时间相隔的天数 Date.prototype.betweenDays=function(date) { var daySpan = (Date.parse(this) - Date.parse(date)) / 86400000; return daySpan; }