如何获取当前的日期和时间

Posted 2020-08-19 happiness木木

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

js代码：

//---------------------------------------------------  
// 
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;  
}