JS获取今日、本周、本月、本年的时间范围

Posted on | In |
Words count in article: 432

代码
kssj表示过去某天的时间
jssj表示今天的时间
new Date为今天的时间
getThisWeekFirstDay 函数获取这一周第一天的时间
getThisMonthFirstDay 函数获取这一个月第一天的时间
getThisYearFirstDay 函数获取这一年第一天的时间
最后的Date类型转换是为了格式化时间

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<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
<input type="text" id="dateFrom" value="">
<input type="text" id="dateTo" value="">
<script>
window.onload = function() {
	// getDate("thisDay");
	// getDate("thisWeek");
	// getDate("thisMonth");
	getDate("thisYear");
}
	//获取推送时间段
	function getDate(type){
		var kssj,jssj;
		var today = new Date();
		var DAY = 1000*60*60*24;
	    if(type =="thisDay") { //当天
	    	kssj = new Date();
	    	jssj = new Date();
		}
	    if(type == "thisWeek") { //本周周
	    	kssj = getThisWeekFirstDay();//本周第一天
	    	jssj = new Date();
	  	}
	    if(type == "thisMonth") { //本月
	       	kssj = getThisMonthFirstDay();//本月第一天
	       	jssj = new Date();
	    }
	    if(type == "thisYear") { //本年
	    	kssj = getThisYearFirstDay();//本年第一天
	    	jssj = new Date();
	    }
	    var dateFrom = kssj.format('yyyy-MM-dd');
	   	var dateTo = jssj.format('yyyy-MM-dd');
	   	document.getElementById("dateFrom").value=dateFrom;
	   	document.getElementById("dateTo").value=dateTo;
	}
	function getThisWeekFirstDay() {
	  	var now = new Date();
	   	var day = now.getDay();
	    var week = "1234567";
	    var first = 0 - week.indexOf(day);
	    var thisWeekfirstDay = new Date;
	    thisWeekfirstDay.setDate (thisWeekfirstDay.getDate () + first);
	    return thisWeekfirstDay;
	}
	function getThisMonthFirstDay(){
	  	var date=new Date();
	 	date.setDate(1);
	 	return date;
	}
	function getThisYearFirstDay() {
	    var currentDate=new Date();
	    var currentYear=currentDate.getFullYear();
	    var currentYearFirstDate=new Date(currentYear,0,1);
	    return currentYearFirstDate;
	}
	//data类型转string
	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;
	}
</script>
</body>
</html>