Javascript 日期格式化相关操作

小咪咪 2022-08-13 00:47 226阅读 0赞

#### 1.相关扩展函数 ####

//---------------------------------------------------
    // 判断闰年
    //---------------------------------------------------
    Date.prototype.isLeapYear = function()
    {
    	return (0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0)));
    };
    
    //---------------------------------------------------
    // 日期格式化
    // 格式 YYYY/yyyy/YY/yy 表示年份
    // MM/M 月份
    // W/w 星期
    // dd/DD/d/D 日期
    // hh/HH/h/H 时间
    // mm/m 分钟
    // ss/SS/s/S 秒
    //---------------------------------------------------
    
    Date.prototype.Format = function(formatStr)
    {
    	var str = formatStr;
    	var Week = ['日','一','二','三','四','五','六'];
    	str=str.replace(/yyyy|YYYY/,this.getFullYear());
    	str=str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100));
    	str=str.replace(/MM/,(this.getMonth() + 1)>9?(this.getMonth() + 1).toString():'0' + (this.getMonth() + 1));
    	str=str.replace(/M/g,this.getMonth() + 1);
    	str=str.replace(/w|W/g,Week[this.getDay()]);
    	str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate());
    	str=str.replace(/d|D/g,this.getDate());
    	str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours());
    	str=str.replace(/h|H/g,this.getHours());
    	str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes());
    	str=str.replace(/m/g,this.getMinutes());
    	str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds());
    	str=str.replace(/s|S/g,this.getSeconds());
    	return str;
    };
    
    //+---------------------------------------------------
    //| 求两个时间的天数差 日期格式为 YYYY-MM-dd
    //+---------------------------------------------------
    function daysBetween(DateOne,DateTwo)
    {
    	var OneMonth = DateOne.substring(5,DateOne.lastIndexOf('-'));
    	var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf('-')+1);
    	var OneYear = DateOne.substring(0,DateOne.indexOf('-'));
    	var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf('-'));
    	var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf('-')+1);
    	var TwoYear = DateTwo.substring(0,DateTwo.indexOf('-'));
    	var cha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)- Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/86400000);
    	return Math.abs(cha);
    }
    
    //+---------------------------------------------------
    //| 日期计算
    //+---------------------------------------------------
    Date.prototype.DateAdd = function(strInterval, number) {
    	var dtTmp = this;
    	switch (strInterval) {
    	case 's' :return new Date(Date.parse(dtTmp.toGMTString()) + (1000 * number));
    	case 'n' :return new Date(Date.parse(dtTmp.toGMTString()) + (60000 * number));
    	case 'h' :return new Date(Date.parse(dtTmp.toGMTString()) + (3600000 * number));
    	case 'd' :return new Date(Date.parse(dtTmp.toGMTString()) + (86400000 * number));
    	case 'w' :return new Date(Date.parse(dtTmp.toGMTString()) + ((86400000 * 7) * number));
    	//FIXME 以下两种对跨年的增加有异常
    //	case 'q' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number*3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
    //	case 'm' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
    	case 'y' :return new Date((dtTmp.getFullYear() + number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds());
    	}
    };
    
    //+---------------------------------------------------
    //| 比较日期差 dtEnd 格式为日期型或者 有效日期格式字符串
    //+---------------------------------------------------
    Date.prototype.DateDiff = function(strInterval, dtEnd) {
    	var dtStart = this;
    	if (typeof dtEnd == 'string' )//如果是字符串转换为日期型
    	{
    	dtEnd = StringToDate(dtEnd);
    	}
    	switch (strInterval) {
    	case 's' :return parseInt((dtEnd - dtStart) / 1000);
    	case 'n' :return parseInt((dtEnd - dtStart) / 60000);
    	case 'h' :return parseInt((dtEnd - dtStart) / 3600000);
    	case 'd' :return parseInt((dtEnd - dtStart) / 86400000);
    	case 'w' :return parseInt((dtEnd - dtStart) / (86400000 * 7));
    	case 'm' :return (dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dtStart.getFullYear())*12) - (dtStart.getMonth()+1);
    	case 'y' :return dtEnd.getFullYear() - dtStart.getFullYear();
    	}
    };
    
    //+---------------------------------------------------
    //| 日期输出字符串，重载了系统的toString方法
    //+---------------------------------------------------
    Date.prototype.toString = function(showWeek)
    {
    	var myDate= this;
    	var str = myDate.toLocaleDateString();
    	if (showWeek)
    	{
    	var Week = ['日','一','二','三','四','五','六'];
    	str += ' 星期' + Week[myDate.getDay()];
    	}
    	return str;
    };

### 2.调用格式 ###

//格式化日期
    var date=new Date();
    var res=date.Format("yyyy-MM-dd HH:mm:ss  星期W");
    console.info(res);
    var date1=new  Date();
    //增加2个星期
    var date2=date1.DateAdd('w',2);
    //求日期差
    var dif=daysBetween(date1.Format("yyyy-MM-dd"),date2.Format("yyyy-MM-dd"))
    console.info(dif);
    //比较日期差
    var dateDiff=date1.DateDiff('d',date2);
    console.info(dateDiff);
    //toString
    console.info(date1.toString())
    //判断是否是闰年
    console.info(date1.isLeapYear())

### 3.结果 ###

2014-10-08 10:13:25  星期三
    14
    13
    2014/10/8
    false