Js 获取当前日期时间及其它操作（转）-优快云博客

本文详细介绍了使用JavaScript进行日期和时间处理的各种方法，包括获取当前日期时间、日期格式化、日期计算、比较日期差等实用功能，同时提供了丰富的代码示例。

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Js获取当前日期时间及其它操作

var myDate = new Date();
myDate.getYear();        //获取当前年份(2位)
myDate.getFullYear();    //获取完整的年份(4位,1970-????)
myDate.getMonth();       //获取当前月份(0-11,0代表1月)
myDate.getDate();        //获取当前日(1-31)
myDate.getDay();         //获取当前星期X(0-6,0代表星期天)
myDate.getTime();        //获取当前时间(从1970.1.1开始的毫秒数)
myDate.getHours();       //获取当前小时数(0-23)
myDate.getMinutes();     //获取当前分钟数(0-59)
myDate.getSeconds();     //获取当前秒数(0-59)
myDate.getMilliseconds();    //获取当前毫秒数(0-999)
myDate.toLocaleDateString();     //获取当前日期
var mytime=myDate.toLocaleTimeString();     //获取当前时间
myDate.toLocaleString( );        //获取日期与时间

日期时间脚本库方法列表

Date.prototype.isLeapYear 判断闰年
Date.prototype.Format 日期格式化
Date.prototype.DateAdd 日期计算
Date.prototype.DateDiff 比较日期差
Date.prototype.toString 日期转字符串
Date.prototype.toArray 日期分割为数组
Date.prototype.DatePart 取日期的部分信息
Date.prototype.MaxDayOfDate 取日期所在月的最大天数
Date.prototype.WeekNumOfYear 判断日期所在年的第几周
StringToDate 字符串转日期型
IsValidDate 验证日期有效性
CheckDateTime 完整日期时间检查
daysBetween 日期天数差

html

<html>
<head>
    <title></title>
</head>
<body>
    <h1 id="h1">h1</h1>

    <input type="button" id="btn" value="按钮" onclick="f1();" />

    <script src="/dateFormat.js"></script>
    <script>
        function f1() {
            var dateStr = new Date().Format("yyyy-MM-dd HH:mm:ss");
            var h1 = document.getElementById('h1');
            h1.innerText = dateStr;
            console.log(dateStr);
        }
    </script>
</body>
</html>

dateFormat.zip

var source = 'https://www.cnblogs.com/kikyoqiang/p/11088963.html';

//---------------------------------------------------
// 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() > 9 ? this.getMonth().toString() : '0' + this.getMonth());
    str = str.replace(/M/g, this.getMonth());

    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) + (1000 * Number));
        case 'n': return new Date(Date.parse(dtTmp) + (60000 * Number));
        case 'h': return new Date(Date.parse(dtTmp) + (3600000 * Number));
        case 'd': return new Date(Date.parse(dtTmp) + (86400000 * Number));
        case 'w': return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number));
        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;
}

//+---------------------------------------------------
//| 日期合法性验证
//| 格式为：YYYY-MM-DD或YYYY/MM/DD
//+---------------------------------------------------
function IsValidDate(DateStr) {
    var sDate = DateStr.replace(/(^\s+|\s+$)/g, ''); //去两边空格;
    if (sDate == '') return true;
    //如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为''
    //数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式
    var s = sDate.replace(/[\d]{4,4 }[\-/]{1}[\d]{1,2 }[\-/]{1}[\d]{1,2 }/g, '');
    if (s == '') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D
    {
        var t = new Date(sDate.replace(/\-/g, '/'));
        var ar = sDate.split(/[-/:]/);
        if (ar[0] != t.getYear() || ar[1] != t.getMonth() + 1 || ar[2] != t.getDate()) {
            //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');
            return false;
        }
    }
    else {
        //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');
        return false;
    }
    return true;
}

//+---------------------------------------------------
//| 日期时间检查
//| 格式为：YYYY-MM-DD HH:MM:SS
//+---------------------------------------------------
function CheckDateTime(str) {
    var reg = /^(\d+)-(\d{1,2 })-(\d{1,2 }) (\d{1,2 }):(\d{1,2 }):(\d{1,2 })$/;
    var r = str.match(reg);
    if (r == null) return false;
    r[2] = r[2] - 1;
    var d = new Date(r[1], r[2], r[3], r[4], r[5], r[6]);
    if (d.getFullYear() != r[1]) return false;
    if (d.getMonth() != r[2]) return false;
    if (d.getDate() != r[3]) return false;
    if (d.getHours() != r[4]) return false;
    if (d.getMinutes() != r[5]) return false;
    if (d.getSeconds() != r[6]) return false;
    return true;
}

//+---------------------------------------------------
//| 把日期分割成数组
//+---------------------------------------------------
Date.prototype.toArray = function () {
    var myDate = this;
    var myArray = Array();
    myArray[0] = myDate.getFullYear();
    myArray[1] = myDate.getMonth();
    myArray[2] = myDate.getDate();
    myArray[3] = myDate.getHours();
    myArray[4] = myDate.getMinutes();
    myArray[5] = myDate.getSeconds();
    return myArray;
}

//+---------------------------------------------------
//| 取得日期数据信息
//| 参数 interval 表示数据类型
//| y 年 m月 d日 w星期 ww周 h时 n分 s秒
//+---------------------------------------------------
Date.prototype.DatePart = function (interval) {
    var myDate = this;
    var partStr = '';
    var Week = ['日', '一', '二', '三', '四', '五', '六'];
    switch (interval) {
        case 'y': partStr = myDate.getFullYear(); break;
        case 'm': partStr = myDate.getMonth() + 1; break;
        case 'd': partStr = myDate.getDate(); break;
        case 'w': partStr = Week[myDate.getDay()]; break;
        case 'ww': partStr = myDate.WeekNumOfYear(); break;
        case 'h': partStr = myDate.getHours(); break;
        case 'n': partStr = myDate.getMinutes(); break;
        case 's': partStr = myDate.getSeconds(); break;
    }
    return partStr;
}

//+---------------------------------------------------
//| 取得当前日期所在月的最大天数
//+---------------------------------------------------
Date.prototype.MaxDayOfDate = function () {
    var myDate = this;
    var ary = myDate.toArray();
    var date1 = (new Date(ary[0], ary[1] + 1, 1));
    var date2 = date1.dateAdd(1, 'm', 1);
    var result = dateDiff(date1.Format('yyyy-MM-dd'), date2.Format('yyyy-MM-dd'));
    return result;
}

//+---------------------------------------------------
//| 取得当前日期所在周是一年中的第几周
//+---------------------------------------------------
Date.prototype.WeekNumOfYear = function () {
    var myDate = this;
    var ary = myDate.toArray();
    var year = ary[0];
    var month = ary[1] + 1;
    var day = ary[2];
    document.write('<script language=VBScript\> \n');
    document.write('myDate = Datue(\'\'+month+\' - \'+day+\' - \'+year+\'\') \n');
    document.write('result = DatePart(\'ww\', myDate) \n');
    document.write(' \n');
    return result;
}

//+---------------------------------------------------
//| 字符串转成日期类型
//| 格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd
//+---------------------------------------------------
function StringToDate(DateStr) {

    var converted = Date.parse(DateStr);
    var myDate = new Date(converted);
    if (isNaN(myDate)) {
        //var delimCahar = DateStr.indexOf('/')!=-1?'/':'-';
        var arys = DateStr.split('-');
        myDate = new Date(arys[0], --arys[1], arys[2]);
    }
    return myDate;
}



//若要显示: 当前日期加时间(如: 2009 - 06 - 12 12: 00)

function CurentTime() {
    var now = new Date();

    var year = now.getFullYear();       //年
    var month = now.getMonth() + 1;     //月
    var day = now.getDate();            //日

    var hh = now.getHours();            //时
    var mm = now.getMinutes();          //分

    var clock = year + "-";

    if (month < 10)
        clock += "0";

    clock += month + "-";

    if (day < 10)
        clock += "0";

    clock += day + " ";

    if (hh < 10)
        clock += "0";

    clock += hh + ":";
    if (mm < 10) clock += '0';
    clock += mm;
    return (clock);
}