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Last active February 14, 2024 04:44
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JAVASCRIPT:时间格式化
/**
* 对Date的扩展,将 Date 转化为指定格式的String
* 月(M)、日(d)、12小时(h)、24小时(H)、分(m)、秒(s)、周(E)、季度(q) 可以用 1-2 个占位符
* 年(y)可以用 1-4 个占位符,毫秒(S)只能用 1 个占位符(是 1-3 位的数字)
* eg:
* (new Date()).pattern("yyyy-MM-dd hh:mm:ss.S") ==> 2007-07-02 08:09:04.423
* (new Date()).pattern("yyyy-MM-dd E HH:mm:ss") ==> 2007-03-10 二 20:09:04
* (new Date()).pattern("yyyy-MM-dd EE hh:mm:ss") ==> 2007-03-10 周二 08:09:04
* (new Date()).pattern("yyyy-MM-dd EEE hh:mm:ss") ==> 2007-03-10 星期二 08:09:04
* (new Date()).pattern("yyyy-M-d h:m:s.S") ==> 2007-7-2 8:9:4.18
*/
Date.prototype.format = function(fmt) {
var o = {
"M+": this.getMonth() + 1,
//月份
"d+": this.getDate(),
//日
"h+": this.getHours() % 12 == 0 ? 12 : this.getHours() % 12,
//小时
"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
};
var week = {
"0": "\u65e5",
"1": "\u4e00",
"2": "\u4e8c",
"3": "\u4e09",
"4": "\u56db",
"5": "\u4e94",
"6": "\u516d"
};
if (/(y+)/.test(fmt)) {
fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
}
if (/(E+)/.test(fmt)) {
fmt = fmt.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? "\u661f\u671f": "\u5468") : "") + week[this.getDay() + ""]);
}
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;
}
//test
//alert((new Date()).format("yyyy-MM-dd EEE hh:mm:ss"));
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