javascript实现时间日期的格式化的方法汇总

function formatDate(time){
	var date = new Date(time);

	var year = date.getFullYear(),
		month = date.getMonth() + 1,//月份是从0开始的
		day = date.getDate(),
		hour = date.getHours(),
		min = date.getMinutes(),
		sec = date.getSeconds();
	var newTime = year + '-' +
				month + '-' +
				day + ' ' +
				hour + ':' +
				min + ':' +
				sec;
	return newTime;			
}

function formatDate(time){
	var date = new Date(time);

	var year = date.getFullYear(),
		month = date.getMonth()+1,//月份是从0开始的
		day = date.getDate(),
		hour = date.getHours(),
		min = date.getMinutes(),
		sec = date.getSeconds();
	var newTime = year + '-' +
				(month < 10? '0' + month : month) + '-' +
				(day < 10? '0' + day : day) + ' ' +
				(hour < 10? '0' + hour : hour) + ':' +
				(min < 10? '0' + min : min) + ':' +
				(sec < 10? '0' + sec : sec);

	return newTime;			
}

formatDate(new Date().getTime());//2017-05-12 09:09:21

var preArr = Array.apply(null,Array(10)).map(function(elem, index) {
		return '0'+index;
	});////开个长度为10的数组 格式为 ["00", "01", "02", "03", "04", "05", "06", "07", "08", "09"]

function formatDate(time){
	var date = new Date(time);

	var year = date.getFullYear(),
		month = date.getMonth()+1,//月份是从0开始的
		day = date.getDate(),
		hour = date.getHours(),
		min = date.getMinutes(),
		sec = date.getSeconds();
	var preArr = Array.apply(null,Array(10)).map(function(elem, index) {
		return '0'+index;
	});////开个长度为10的数组 格式为 00 01 02 03

	var newTime = year + '-' +
				(preArr[month]||month) + '-' +
				(preArr[day]||day) + ' ' +
				(preArr[hour]||hour) + ':' +
				(preArr[min]||min) + ':' +
				(preArr[sec]||sec);

	return newTime;			
}
formatDate(new Date().getTime());//2017-05-12 09:45:41

function formatDate(time,format='YY-MM-DD hh:mm:ss'){
	var date = new Date(time);

	var year = date.getFullYear(),
		month = date.getMonth()+1,//月份是从0开始的
		day = date.getDate(),
		hour = date.getHours(),
		min = date.getMinutes(),
		sec = date.getSeconds();
	var preArr = Array.apply(null,Array(10)).map(function(elem, index) {
		return '0'+index;
	});////开个长度为10的数组 格式为 00 01 02 03

	var newTime = format.replace(/YY/g,year)
						.replace(/MM/g,preArr[month]||month)
						.replace(/DD/g,preArr[day]||day)
						.replace(/hh/g,preArr[hour]||hour)
						.replace(/mm/g,preArr[min]||min)
						.replace(/ss/g,preArr[sec]||sec);

	return newTime;			
}
formatDate(new Date().getTime());//2017-05-12 10:05:44
formatDate(new Date().getTime(),'YY年MM月DD日');//2017年05月12日
formatDate(new Date().getTime(),'今天是YY/MM/DD hh:mm:ss');//今天是2017/05/12 10:07:45