给Date原型附加format函数支持格式化输出

来源：互联网发布：世界人工智能大会2017 编辑：程序博客网时间：2024/06/06 12:48

代码一：

Date.prototype.format = function(format) {var o = {"M+" : this.getMonth() + 1, //month"d+" : this.getDate(), //day"h+" : this.getHours(), //hour"m+" : this.getMinutes(), //minute"s+" : this.getSeconds(), //second"q+" : Math.floor((this.getMonth() + 3) / 3), //quarter"S" : this.getMilliseconds()//millisecond}if (/(y+)/.test(format))format = format.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));for ( var k in o)if (new RegExp("(" + k + ")").test(format))format = format.replace(RegExp.$1, RegExp.$1.length == 1 ? o[k]: ("00" + o[k]).substr(("" + o[k]).length));return format;}

代码二：

Date.prototype.format = function(pattern) {var returnValue = pattern;var format = {"y+" : this.getFullYear(),"M+" : this.getMonth() + 1,"d+" : this.getDate(),"H+" : this.getHours(),"m+" : this.getMinutes(),"s+" : this.getSeconds(),"S" : this.getMilliseconds()};for ( var key in format) {var regExp = new RegExp("(" + key + ")");if (regExp.test(returnValue)) {var zero = "";var replacement = null;for ( var i = 0; i < RegExp.$1.length; i++) {zero += "0";}if (RegExp.$1.length == 1) {replacement = format[key];} else {replacement = (zero + format[key]).substring((("" + format[key]).length));}returnValue = returnValue.replace(RegExp.$1, replacement);}}return returnValue;};

页面引入后格式化输出测试：

var dateStr = "2014-09-08";var arr = dateStr.split("-");var date = new Date(Number(arr[0]), Number(arr[1])-1, Number(arr[2]));date.format("M.d");

输出结果："9.8"

以上在IE8和Chrome测试通过。

源地址：http://www.blogjava.net/mixer-a/archive/2012/05/10/377846.html

另外说点浏览器差异：

parseInt("08");// 执行结果ie8下为0，chrome下为8new Date("2014-08-6");// 执行结果ie8下undefined，chrome下成功创建日期Date对象

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