js 时间函数 及相关运算大全

//| 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:2012-06-12 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);
    }