js對時間的操作

1.js獲取系統時間格式爲YYYY-MM-DD HH:MM:SS

function curDateTime(){  
    var d = new Date();   
    var year = d.getYear();   
    var month = d.getMonth()+1;   
    var date = d.getDate();   
    var day = d.getDay();   
    var hours = d.getHours();   
    var minutes = d.getMinutes();   
    var seconds = d.getSeconds();   
    var ms = d.getMilliseconds();     
    var curDateTime= year;  
    if(month>9)  
    curDateTime = curDateTime +"-"+month;  
    else  
    curDateTime = curDateTime +"-0"+month;  
    if(date>9)  
    curDateTime = curDateTime +"-"+date;  
    else  
    curDateTime = curDateTime +"-0"+date;  
    if(hours>9)  
    curDateTime = curDateTime +" "+hours;  
    else  
    curDateTime = curDateTime +" 0"+hours;  
    if(minutes>9)  
    curDateTime = curDateTime +":"+minutes;  
    else  
    curDateTime = curDateTime +":0"+minutes;  
    if(seconds>9)  
    curDateTime = curDateTime +":"+seconds;  
    else  
    curDateTime = curDateTime +":0"+seconds;  
    return curDateTime;   
    }

可以用alert(curDateTime())進行測試
Jquery獲取系統時間
var Time=new Date().toLocaleDateString();

2.(1)js對兩個YYYY-MM-DD HH:MM:SS時間進行比較

function comptime(beginTime, endTime){  
    //var beginTime = "2009-09-21 00:00:00";  
//var endTime = "2009-09-21 00:00:01";  
    var beginTimes=beginTime.substring(0,10).split('-');  
    var endTimes=endTime.substring(0,10).split('-');  
    beginTime=beginTimes[1]+'-'+beginTimes[2]+'-'+beginTimes[0]+' '+beginTime.substring(10,19);  
    endTime=endTimes[1]+'-'+endTimes[2]+'-'+endTimes[0]+' '+endTime.substring(10,19);  
    //alert(Date.parse(endTime));  
//alert(Date.parse(beginTime));   
    var a =(Date.parse(endTime)-Date.parse(beginTime))/3600/1000;  
    if(a<0){  
        //alert("endTime小!"); 
        return "small";
    }else if (a>0){  
        //alert("endTime大!");  
        return "big";
    }else if (a==0){  
        //alert("時間相等!"); 
        return "equal";
    }else{  
        return 'exception'  
    }  
    }

3.js比較兩個YYYY-MM-DD 的時間格式

function duibi(a,b)  
{  
var arr=a.split("-");  
var starttime=new Date(arr[0],arr[1],arr[2]);  
var starttimes=starttime.getTime();  
var arrs=b.split("-");  
var lktime=new Date(arrs[0],arrs[1],arrs[2]);  
var lktimes=lktime.getTime();  
if(starttimes>=lktimes)  
{  
alert('開始時間大於離開時間，請檢查');  
return false;  
}  
else  
return true;  
}

4.以下是js對時間所有的操作類和代碼
Js獲取當前日期時間及其它操作
var myDate = new Date(); myDate.getYear(); //獲取當前年份(2位)
myDate.getFullYear(); //獲取完整的年份(4位,1970-????)
myDate.getMonth(); //獲取當前月份(0-11,0代表1月)
myDate.getDate(); //獲取當前日(1-31)
myDate.getDay(); //獲取當前星期X(0-6,0代表星期天)
myDate.getTime(); //獲取當前時間(從1970.1.1開始的毫秒數)
myDate.getHours(); //獲取當前小時數(0-23)
myDate.getMinutes(); //獲取當前分鐘數(0-59)
myDate.getSeconds(); //獲取當前秒數(0-59)
myDate.getMilliseconds(); //獲取當前毫秒數(0-999)
myDate.toLocaleDateString(); //獲取當前日期
var mytime=myDate.toLocaleTimeString(); //獲取當前時間
myDate.toLocaleString( ); //獲取日期與時間
日期時間腳本庫方法列表
Date.prototype.isLeapYear 判斷閏年
Date.prototype.Format 日期格式化
Date.prototype.DateAdd 日期計算
Date.prototype.DateDiff 比較日期差
Date.prototype.toString 日期轉字符串
Date.prototype.toArray 日期分割爲數組
Date.prototype.DatePart 取日期的部分信息
Date.prototype.MaxDayOfDate 取日期所在月的最大天數
Date.prototype.WeekNumOfYear 判斷日期所在年的第幾周
StringToDate 字符串轉日期型 IsValidDate 驗證日期有效性
CheckDateTime 完整日期時間檢查
daysBetween 日期天數差

以下是代碼示例：

//--------------------------------------------------- 
// 判斷閏年 
//--------------------------------------------------- 
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 時間 
// mm/m 分鐘 
// 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; 
} 

//+--------------------------------------------------- 
//| 求兩個時間的天數差 日期格式爲 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); 
} 


//+--------------------------------------------------- 
//| 日期計算 
//+--------------------------------------------------- 
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());
 } 
} 

//+--------------------------------------------------- 
//| 比較日期差 dtEnd 格式爲日期型或者 有效日期格式字符串 
//+--------------------------------------------------- 
Date.prototype.DateDiff = function(strInterval, dtEnd) { 
var dtStart = this; 
if (typeof dtEnd == 'string' )//如果是字符串轉換爲日期型 
{ 
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(); 
} 
} 

//+--------------------------------------------------- 
//| 日期輸出字符串，重載了系統的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; 
} 

//+--------------------------------------------------- 
//| 日期合法性驗證 
//| 格式爲：YYYY-MM-DD或YYYY/MM/DD 
//+--------------------------------------------------- 
function IsValidDate(DateStr) 
{ 
var sDate=DateStr.replace(/(^\s+|\s+$)/g,''); //去兩邊空格; 
if(sDate=='') return true; 
//如果格式滿足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替換爲'' 
//數據庫中，合法日期可以是:YYYY-MM/DD(2003-3/21),數據庫會自動轉換爲YYYY-MM-DD格式 
var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g,'');
 if (s=='') //說明格式滿足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('錯誤的日期格式！格式爲：YYYY-MM-DD或YYYY/MM/DD。注意閏年。'); 
return false; 
} 
} 
else 
{ 
//alert('錯誤的日期格式！格式爲：YYYY-MM-DD或YYYY/MM/DD。注意閏年。'); 
return false; 
} 
return true; 
} 

//+--------------------------------------------------- 
//| 日期時間檢查 
//| 格式爲：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; 
} 

//+--------------------------------------------------- 
//| 把日期分割成數組 
//+--------------------------------------------------- 
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; 
} 

//+--------------------------------------------------- 
//| 取得日期數據信息 
//| 參數 interval 表示數據類型 
//| y 年 m月 d日 w星期 ww周 h時 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; 
} 

//+--------------------------------------------------- 
//| 取得當前日期所在月的最大天數 
//+--------------------------------------------------- 
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; 
} 

//+--------------------------------------------------- 
//| 取得當前日期所在周是一年中的第幾周 
//+--------------------------------------------------- 
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 = DateValue(''+month+'-'+day+'-'+year+'') \n'); 
document.write('result = DatePart('ww', myDate) \n'); 
document.write(' \n'); 
return result; 
} 

//+--------------------------------------------------- 
//| 字符串轉成日期類型 
//| 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; 
}

 /*
    * 獲得時間差,時間格式爲 年-月-日 小時:分鐘:秒 或者 年/月/日 小時：分鐘：秒
    * 其中，年月日爲全格式，例如 ： 2010-10-12 01:00:00
    * 返回精度爲：秒，分，小時，天
    * 參數爲開始時間，結束時間，返回格式（天（day））
    */
    function GetDateDiff(startTime, endTime, diffType) {
        //將xxxx-xx-xx的時間格式，轉換爲 xxxx/xx/xx的格式
        startTime = startTime.replace(/-/g, "/");
        endTime = endTime.replace(/-/g, "/");
        //將計算間隔類性字符轉換爲小寫
        diffType = diffType.toLowerCase();
        var sTime = new Date(startTime); //開始時間
        var eTime = new Date(endTime); //結束時間
        //作爲除數的數字
        var divNum = 1;
        switch (diffType)
        {
            case "second":
                divNum = 1000;
                break;
            case "minute":
                divNum = 1000 * 60;
                break;
            case "hour":
                divNum = 1000 * 3600;
                break;
            case "day":
                divNum = 1000 * 3600 * 24;
                break;
            default:
                break;
        }
        return parseInt((eTime.getTime() - sTime.getTime()) / parseInt(divNum));
    }