format-datetime/index.js

时间日期格式化工具

function formatDate(dateObj,format) {  
	var o = {   
		"M+": dateObj.getMonth() + 1, //月份   
		"d+": dateObj.getDate(), //日   
		"h+": dateObj.getHours() % 12 == 0 ? 12 : dateObj.getHours() % 12, //小时
		"H+": dateObj.getHours(), //小时   
		"m+": dateObj.getMinutes(), //分   
		"s+": dateObj.getSeconds(), //秒   
		"q+": Math.floor((dateObj.getMonth() + 3) / 3), //季度   
		"S": dateObj.getMilliseconds() //毫秒   
	};  
	var week = {   
		"0": "\u65e5",
		"1": "\u4e00",
		"2": "\u4e8c",
		"3": "\u4e09",
		"4": "\u56db",
		"5": "\u4e94",
		"6": "\u516d"  
	};  
	if(/(y+)/.test(format)) {   
		format = format.replace(RegExp.$1, (dateObj.getFullYear() + "").substr(4 - RegExp.$1.length));  
	}  
	if(/(E+)/.test(format)) {   
		format = format.replace(RegExp.$1, ((RegExp.$1.length > 1) ? (RegExp.$1.length > 2 ? "\u661f\u671f" : "\u5468") : "") + week[dateObj.getDay() + ""]);  
	}  
	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;
};

module.exports = formatDate;