Javascript 时间格式化

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;
    }

 

// 时间格式化
Date.prototype.format =function(){
	var format=null;
	var now = new Date();
    var o = {
	    "M" : this.getMonth()+1, // month
	    "d" : this.getDate(),    // day
	    "h" : this.getHours(),   // hour
	    "m" : this.getMinutes(), // minute
	    "s" : this.getSeconds(), // second
    };
    if(this.getFullYear() == now.getFullYear()){
    	if(o.M == now.getMonth()+1){
    		if(o.d == now.getDate())
    			format = "今天 " + (o.h<10?"0"+ o.h:o.h) + ":" + (o.m<10?"0"+o.m:o.m) + ":" 
    					+ (o.s<10?"0"+o.s:o.s);
    		else if(o.d == now.getDate()-1)
    			format = "昨天 " + (o.h<10?"0"+ o.h:o.h) + ":" + (o.m<10?"0"+o.m:o.m) + ":" 
    					+ (o.s<10?"0"+o.s:o.s);
    		else format = o.M + "月" + o.d + "日";
    	}else{
    		format = o.M + "月" + o.d + "日";
    	}	
    }else{
		format = this.getFullYear() + "年" + o.M + "月" + o.d + "日";
    }
    delete now;
    return format;
};

 

// 时间格式化

  Date.prototype.format =function(){

	var now=new Date().valueOf(),

            formatFunctionCache={
                'Seconds':function(dateTime,spendSeconds){
                    return parseInt(spendSeconds)+'秒钟前';
                },
              	'Minutes':function(dateTime,spendSeconds){
                    return parseInt(spendSeconds/60)+'分'+parseInt(spendSeconds%60)+'秒前';
                },
                'Hours':function(dateTime,spendSeconds){
                    return parseInt(spendSeconds/(60*60))+'小时前';
                },
                'Days':function(dateTime,spendSeconds){
                    return parseInt(spendSeconds/(60*60*24))+'天前';
                },
                'Month':function(dateTime,spendSeconds){
                    return parseInt(spendSeconds/(60*60*24*30))+'个月前';
                }
            };
            var spendSeconds=(now- this.valueOf())/(1000),
                func;

            if(spendSeconds<(60*60*24)){//一天之内

                if(spendSeconds<60){//一分钟之内
                    func=formatFunctionCache['Seconds'];
                }else if(spendSeconds<60*60){//一小时之内
                    func=formatFunctionCache['Minutes'];
                }else{//一天之内
                    func=formatFunctionCache['Hours'];
                }

            }else if(spendSeconds<60*60*24*30){//一个月之内
                func=formatFunctionCache['Days'];
            }else{//N个月之前
                func=formatFunctionCache['Month'];
            }
//          ...
            return func(this,spendSeconds);
        }

 

 

以上代码必须先声明，然后在使用。使用方法：

var d =new Date().format('yyyy-MM-dd');