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  • JS date常用代码积累

    Date.prototype.Format = function(fmt) {
            var o = {
                "M+" : this.getMonth()+1,                 //月份
                "d+" : this.getDate(),                    //
                "h+" : this.getHours(),                   //小时
                "m+" : this.getMinutes(),                 //
                "s+" : this.getSeconds(),                 //
                "q+" : Math.floor((this.getMonth()+3)/3), //季度
                "S"  : this.getMilliseconds()             //毫秒
            };
            if(/(y+)/.test(fmt))fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length));
            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;
    };

    上述为日历format

     下述为查找前一天的代码

    function getYestoday(date){    
    	var yesterday_milliseconds=date.getTime()-1000*60*60*24;     
    	var yesterday = new Date();     
    	    yesterday.setTime(yesterday_milliseconds);     
    	  
    	var strYear = yesterday.getFullYear();  
    	var strDay = yesterday.getDate();  
    	var strMonth = yesterday.getMonth()+1;
    	if(strMonth<10)  
    	{  
    		strMonth="0"+strMonth;  
    	}  
    	datastr = strYear+"-"+strMonth+"-"+strDay;
    	return datastr;
      }
      
      //获得上个月在昨天这一天的日期
      function getLastMonthYestdy(date){
         var daysInMonth = new Array([0],[31],[28],[31],[30],[31],[30],[31],[31],[30],[31],[30],[31]);
    	 var strYear = date.getFullYear();  
    	 var strDay = date.getDate();  
    	 var strMonth = date.getMonth()+1;
    	 if(strYear%4 == 0 && strYear%100 != 0){
    		daysInMonth[2] = 29;
    	 }
    	 if(strMonth - 1 == 0)
    	 {
    		strYear -= 1;
    		strMonth = 12;
    	 }
    	 else
    	 {
    		strMonth -= 1;
    	 }
         strDay = daysInMonth[strMonth] >= strDay ? strDay : daysInMonth[strMonth];
    	 if(strMonth<10)  
    	 {  
    		strMonth="0"+strMonth;  
    	 }
    	 if(strDay<10)  
    	 {  
    		strDay="0"+strDay;  
    	 }
    	 datastr = strYear+"-"+strMonth+"-"+strDay;
    	 return datastr;
      }
      
      //获得上一年在昨天这一天的日期
      function getLastYearYestdy(date){
    	 var strYear = date.getFullYear() - 1;  
    	 var strDay = date.getDate();  
    	 var strMonth = date.getMonth()+1;
    	 if(strMonth<10)  
    	 {  
    		strMonth="0"+strMonth;  
    	 }
    	 if(strDay<10)  
    	 {  
    		strDay="0"+strDay;  
    	 }
    	 datastr = strYear+"-"+strMonth+"-"+strDay;
    	 return datastr;
      }
    

      

    此为getTime()取得毫秒数的秘籍

    var haomiao = +new Date();
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  • 原文地址:https://www.cnblogs.com/ffjiang/p/5110526.html
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