Js获取当前日期时间及其它操作

柔情只为你懂 2022-08-03 12:59 265阅读 0赞

# 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

### 代码块 ###

“\` javascript

//—————————————————  
// 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); 
    }