js 获取当前日期

Js 获取当前日期

文章分类:Web前端

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

//---------------------------------------------------
//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)
{
varstr=formatStr;
varWeek=['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());

returnstr;
}

//+---------------------------------------------------
//|求两个时间的天数差日期格式为YYYY-MM-dd
//+---------------------------------------------------
functiondaysBetween(DateOne,DateTwo)
{
varOneMonth=DateOne.substring(5,DateOne.lastIndexOf('-'));
varOneDay=DateOne.substring(DateOne.length,DateOne.lastIndexOf('-')+1);
varOneYear=DateOne.substring(0,DateOne.indexOf('-'));

varTwoMonth=DateTwo.substring(5,DateTwo.lastIndexOf('-'));
varTwoDay=DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf('-')+1);
varTwoYear=DateTwo.substring(0,DateTwo.indexOf('-'));

varcha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)-Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/86400000);
returnMath.abs(cha);
}


//+---------------------------------------------------
//|日期计算
//+---------------------------------------------------
Date.prototype.DateAdd=function(strInterval,Number){
vardtTmp=this;
switch(strInterval){
case's':returnnewDate(Date.parse(dtTmp)+(1000*Number));
case'n':returnnewDate(Date.parse(dtTmp)+(60000*Number));
case'h':returnnewDate(Date.parse(dtTmp)+(3600000*Number));
case'd':returnnewDate(Date.parse(dtTmp)+(86400000*Number));
case'w':returnnewDate(Date.parse(dtTmp)+((86400000*7)*Number));
case'q':returnnewDate(dtTmp.getFullYear(),(dtTmp.getMonth())+Number*3,dtTmp.getDate(),dtTmp.getHours(),dtTmp.getMinutes(),dtTmp.getSeconds());
case'm':returnnewDate(dtTmp.getFullYear(),(dtTmp.getMonth())+Number,dtTmp.getDate(),dtTmp.getHours(),dtTmp.getMinutes(),dtTmp.getSeconds());
case'y':returnnewDate((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){
vardtStart=this;
if(typeofdtEnd=='string')//如果是字符串转换为日期型
{
dtEnd=StringToDate(dtEnd);
}
switch(strInterval){
case's':returnparseInt((dtEnd-dtStart)/1000);
case'n':returnparseInt((dtEnd-dtStart)/60000);
case'h':returnparseInt((dtEnd-dtStart)/3600000);
case'd':returnparseInt((dtEnd-dtStart)/86400000);
case'w':returnparseInt((dtEnd-dtStart)/(86400000*7));
case'm':return(dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dtStart.getFullYear())*12)-(dtStart.getMonth()+1);
case'y':returndtEnd.getFullYear()-dtStart.getFullYear();
}
}

//+---------------------------------------------------
//|日期输出字符串，重载了系统的toString方法
//+---------------------------------------------------
Date.prototype.toString=function(showWeek)
{
varmyDate=this;
varstr=myDate.toLocaleDateString();
if(showWeek)
{
varWeek=['日','一','二','三','四','五','六'];
str+='星期'+Week[myDate.getDay()];
}
returnstr;
}

//+---------------------------------------------------
//|日期合法性验证
//|格式为：YYYY-MM-DD或YYYY/MM/DD
//+---------------------------------------------------
functionIsValidDate(DateStr)
{
varsDate=DateStr.replace(/(^\s+|\s+$)/g,'');//去两边空格;
if(sDate=='')returntrue;
//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
vars=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
{
vart=newDate(sDate.replace(/\-/g,'/'));
varar=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。');
returnfalse;
}
}
else
{
//alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。');
returnfalse;
}
returntrue;
}

//+---------------------------------------------------
//|日期时间检查
//|格式为：YYYY-MM-DDHH:MM:SS
//+---------------------------------------------------
functionCheckDateTime(str)
{
varreg=/^(\d+)-(\d{1,2})-(\d{1,2})(\d{1,2}):(\d{1,2}):(\d{1,2})$/;
varr=str.match(reg);
if(r==null)returnfalse;
r[2]=r[2]-1;
vard=newDate(r[1],r[2],r[3],r[4],r[5],r[6]);
if(d.getFullYear()!=r[1])returnfalse;
if(d.getMonth()!=r[2])returnfalse;
if(d.getDate()!=r[3])returnfalse;
if(d.getHours()!=r[4])returnfalse;
if(d.getMinutes()!=r[5])returnfalse;
if(d.getSeconds()!=r[6])returnfalse;
returntrue;
}

//+---------------------------------------------------
//|把日期分割成数组
//+---------------------------------------------------
Date.prototype.toArray=function()
{
varmyDate=this;
varmyArray=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();
returnmyArray;
}

//+---------------------------------------------------
//|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)
{
varmyDate=this;
varpartStr='';
varWeek=['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;
}
returnpartStr;
}

//+---------------------------------------------------
//|取得当前日期所在月的最大天数
//+---------------------------------------------------
Date.prototype.MaxDayOfDate=function()
{
varmyDate=this;
varary=myDate.toArray();
vardate1=(newDate(ary[0],ary[1]+1,1));
vardate2=date1.dateAdd(1,'m',1);
varresult=dateDiff(date1.Format('yyyy-MM-dd'),date2.Format('yyyy-MM-dd'));
returnresult;
}

//+---------------------------------------------------
//|取得当前日期所在周是一年中的第几周
//+---------------------------------------------------
Date.prototype.WeekNumOfYear=function()
{
varmyDate=this;
varary=myDate.toArray();
varyear=ary[0];
varmonth=ary[1]+1;
varday=ary[2];
document.write('<scriptlanguage=VBScript\>\n');
document.write('myDate=DateValue('+month+'-'+day+'-'+year+')\n');
document.write("result=DatePart('ww',myDate)\n");
document.write('\n');
returnresult;
}

//+---------------------------------------------------
//|字符串转成日期类型
//|格式MM/dd/YYYYMM-dd-YYYYYYYY/MM/ddYYYY-MM-dd
//+---------------------------------------------------
functionStringToDate(DateStr)
{

varconverted=Date.parse(DateStr);
varmyDate=newDate(converted);
if(isNaN(myDate))
{
//vardelimCahar=DateStr.indexOf('/')!=-1?'/':'-';
vararys=DateStr.split('-');
myDate=newDate(arys[0],--arys[1],arys[2]);
}
returnmyDate;
}