javascript 对日期加减操作 格式化

IT-攻城师

/** * js 对date加减 */Date.prototype.Format = function(fmt) {// author: meizzvar o = {"M+" : this.getMonth() + 1, // 月份"d+" : this.getDate(), // 日"h+" : this.getHours(), // 小时"m+" : this.getMinutes(), // 分"s+" : this.getSeconds(), // 秒"q+" : Math.floor((this.getMonth() + 3) / 3), // 季度"S" : this.getMilliseconds()// 毫秒};if (/(y+)/.test(fmt))fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4- RegExp.$1.length));for (var k in o)if (new RegExp("(" + k + ")").test(fmt))fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1)? (o[k]): (("00" + o[k]).substr(("" + o[k]).length)));return fmt;}Date.prototype.addDays = function(d) {this.setDate(this.getDate() + d);};Date.prototype.addWeeks = function(w) {this.addDays(w * 7);};Date.prototype.addMonths = function(m) {var d = this.getDate();this.setMonth(this.getMonth() + m);if (this.getDate() < d)this.setDate(0);};Date.prototype.addYears = function(y) {var m = this.getMonth();this.setFullYear(this.getFullYear() + y);if (m < this.getMonth()) {this.setDate(0);}};//js格式化时间Date.prototype.toDateString = function(formatStr) {var date = this;var timeValues = function() {};timeValues.prototype = {year : function() {if (formatStr.indexOf("yyyy") >= 0) {return date.getYear();} else {return date.getYear().toString().substr(2);}},elseTime : function(val, formatVal) {return formatVal >= 0 ? (val < 10 ? "0" + val : val) : (val);},month : function() {return this.elseTime(date.getMonth() + 1, formatStr.indexOf("MM"));},day : function() {return this.elseTime(date.getDate(), formatStr.indexOf("dd"));},hour : function() {return this.elseTime(date.getHours(), formatStr.indexOf("hh"));},minute : function() {return this.elseTime(date.getMinutes(), formatStr.indexOf("mm"));},second : function() {return this.elseTime(date.getSeconds(), formatStr.indexOf("ss"));}}var tV = new timeValues();var replaceStr = {year : ["yyyy", "yy"],month : ["MM", "M"],day : ["dd", "d"],hour : ["hh", "h"],minute : ["mm", "m"],second : ["ss", "s"]};for (var key in replaceStr) {formatStr = formatStr.replace(replaceStr[key][0], eval("tV." + key+ "()"));formatStr = formatStr.replace(replaceStr[key][1], eval("tV." + key+ "()"));}return formatStr;}function formatStrDate(date) {var str = date.toDateString("yyyy-MM-dd hh:mm:ss");if (str.indexOf("00:00:00") != -1) {return str.replace("00:00:00", "10:00:00");}return str;}var date = new Date();date.addDays(-3);console.info(date.toDateString("yyyy-MM-dd hh:mm:ss"));