js 常用时间转换

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));

}

}

console.log(format);

return format;

}

var now = new Date();

var nowStr = now.format("yyyy-MM-dd");

return nowStr;