JS date obtained and formatted

Original address: http://www.cnblogs.com/qinpengming/archive/2012/12/03/2800002.html

JS get current datetime and format operation var mydate = new Date (); Mydate.getyear ();    Gets the current year (2-bit) mydate.getfullyear (); Get the full year (4-bit, 1970-????)       Mydate.getmonth ();        Get the current month (0-11, 0 for January) mydate.getdate ();         Get current day (1-31) mydate.getday ();        Get Current week x (0-6, 0 for Sunday) mydate.gettime ();       Gets the current time (the number of milliseconds starting in 1970.1.1) mydate.gethours ();     Gets the current number of hours (0-23) mydate.getminutes ();     Gets the current number of minutes (0-59) mydate.getseconds ();    Gets the current number of seconds (0-59) mydate.getmilliseconds ();     Gets the current number of milliseconds (0-999) mydate.tolocaledatestring ();     Gets the current date var mytime=mydate.tolocaletimestring ();        Gets the current time mydate.tolocalestring (); Get date and Time Date Time Script Library method list Date.prototype.isLeapYear Judge leap year Date.prototype.Format date formatting Date.prototype.DateAdd Date Calculation Date.prototype.DateDiff Comparison date difference Date.prototype.toString date to string Date.prototype.toArray The date is split into an array Date.prototype.DatePart partial information for the date Date.prototype.MaxDayOfDate the maximum number of days in the month in which the date is taken Date.prototype.WeekNumOfYear Determine the week ordinal of the year stringtodate string to date type Isvaliddate validation date validity checkdatetime full datetime check daysbetween date days difference JS code://---------------------------------------------------//Judgment Leap Year//--------------------------------------------------- Date.prototype.isLeapYear = function () {return (0==this.getyear ()%4&& ((This.getyear ()%100!=0) | |   (This.getyear ()%400==0));  }//---------------------------------------------------//date formatting//Format YYYY/YYYY/YY/YY represents the year//mm/m month//w/w week DD/DD/D/D Date//hh/hh/h/h time//mm/m min//ss/ss/s/s sec//---------------------------------------------------date. Prototype.       Format = function (formatstr) {var str = FORMATSTR;        var Week = [' Day ', ' one ', ' two ', ' three ', ' four ', ' five ', ' six ']; Str=str.replace (/yyyy|       Yyyy/,this.getfullyear ()); Str=str.replace (/yy| yy/, (this.getyear ()%) >9?         (This.getyear ()%). 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; }     //+---------------------------------------------------  //| Two days Difference date format is 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); }      //+---------------------------------------------------  //|       Date Calculation//+---------------------------------------------------Date.prototype.DateAdd = function (strinterval, number) {      var dttmp = this;          Switch (strinterval) {case ' s ': return new Date (Date.parse (dttmp) + (* 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 ()); }  }    //+---------------------------------------------------  //| Comparison Date Difference dtend format is a date type or valid date format string//+---------------------------------------------------Date.prototype.DateDiff =      function (Strinterval, dtend) {var dtstart = this;      if (typeof dtend = = ' string ')//if the string is converted to a date type {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 (); }  }    //+---------------------------------------------------  //| A date output string that overloads the system's ToString method//+---------------------------------------------------Date.prototype.toString = function  (Showweek)      {var mydate= this;      var str = mydate.tolocaledatestring ();          if (Showweek) {var Week = [' Day ', ' one ', ' two ', ' three ', ' four ', ' five ', ' six '];      str + = ' Week ' + week[mydate.getday ()];  } return str; }    //+---------------------------------------------------  //| Date Legitimacy Verification//|   The format is: YYYY-MM-DD or yyyy/mm/dd//+---------------------------------------------------function isvaliddate (datestr) {    var sdate=datestr.replace (/(^\s+|\s+$)/g, ');       Go on both sides of the space;       if (sdate== ") return true; If the format satisfies yyyy-(/) mm-(/) DD or yyyy-(/) m (/) DD or yyyy-(/) m (/) d or yyyy-(/) mm-(/) d is replaced with a '//database, the legal date can be: Yyyy-mm/dd (2003-3/       21), the database is automatically converted to YYYY-MM-DD format var s = sdate.replace (/[\d]{}[\-/]{1}[\d]{}[\-/]{1}[\d]{}/g, ");           if (s== ')//description format satisfies YYYY-MM-DD or YYYY-M-DD or yyyy-m-d or 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 (' Wrong date format! The format is: Yyyy-mm-dd or YYYY/MM/DD. Note leap years.               ‘);           return false; }} else {//alert (' Wrong date format! The format is: Yyyy-mm-dd or YYYY/MM/DD. Note leap years.           ‘);       return false;   } return true; }     //+---------------------------------------------------  //| Date Time Check//| Format: Yyyy-mm-dd HH:MM:SS//+---------------------------------------------------  function Checkdatetime (str) {var reg =/^ (\d+)-(\d{)-(\d{) (\d{)):(\d{):(\d{) $/;       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; }     //+---------------------------------------------------  //| Divide the date into groups//+---------------------------------------------------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; }    //+---------------------------------------------------  //| Get Date data Information//| The parameter interval represents the data type//| Y year M D Day W week WW week h N min S s//+---------------------------------------------------Date.prototype.DatePart = function (int      Erval) {var mydate = this;      var partstr= ';      var Week = [' Day ', ' one ', ' two ', ' three ', ' four ', ' five ', ' six '];          Switch (interval) {case ' y ':p artstr = Mydate.getfullyear ();          Case ' m ':p artstr = Mydate.getmonth () +1;break;          Case ' d ':p artstr = Mydate.getdate ();          Case ' W ':p artstr = Week[mydate.getday ()];break;          Case ' ww ':p artstr = Mydate.weeknumofyear ();          Case ' h ':p artstr = mydate.gethours ();          Case ' n ':p artstr = Mydate.getminutes ();      Case ' s ':p artstr = Mydate.getseconds ();  } return PARTSTR; }    //+---------------------------------------------------  //| Gets the maximum number of days in the month of the current date//+---------------------------------------------------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; }    //+---------------------------------------------------  //|  Get the current date week is the week of the year//+---------------------------------------------------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; }    //+---------------------------------------------------  //| The string is converted to a date type//| Format 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;    If you want to implement a clock like this: December 03, 2012 17:21:16 Monday//local clock function Clockon () {var now = new Date (); var year = Now.getfullyear ();    getFullYear getYear var month = Now.getmonth ();    var date = Now.getdate ();    var day = Now.getday ();    var hour = now.gethours ();    var minu = Now.getminutes ();    var sec = Now.getseconds ();    VAR week;    Month = month + 1;    if (Month <) month = "0" + month;    if (date <) date = "0" + date;    if (hour <) hour = "0" + hour;    if (Minu <) Minu = "0" + minu;    if (sec <) sec = "0" + sec;    var arr_week = new Array ("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"); Week = Arr_week[day];    var time = "";    Time = year + "years" + month + "Month" + Date + "Day" + "+ Hour +": "+ Minu +": "+ sec +" + week;    $ ("#bgclock"). HTML (time); var timer = setTimeout ("Clockon ()", 200);}

　　

Date formatting

/** * For the extension of date, the date is converted to a specified format of string * months (M), Day (d), 12 hours (h), 24 hours (h), minutes (m), seconds (s), Weeks (E), quarter (q) can be used with 1-2 placeholder * years (Y) 1-4 placeholders, milliseconds (S) can only be used with 1 placeholders (1-3 digits) * Eg: * (new Date ()). Pattern ("Yyyy-mm-dd hh:mm:ss. S ") ==> 2006-07-02 08:09:04.423 * (New Date ()). Pattern (" Yyyy-mm-dd E HH:mm:ss ") ==> 2009-03-10 II 20:09:04 * (new Date ()). Pattern ("Yyyy-mm-dd EE hh:mm:ss") ==> 2009-03-10 Tuesday 08:09:04 * (new Date ()). Pattern ("Yyyy-mm-dd EEE hh : Mm:ss ") ==> 2009-03-10 Tuesday 08:09:04 * (New Date ()). Pattern (" yyyy-m-d h:m:s.s ") ==> 2006-7-2 8:9:4.18*/Date.prototype.pattern=function(FMT) {varo = {                "m+": This. GetMonth () +1,//Month"D+": This. GetDate (),//Day"H +": This. getHours ()%12 = = 0? 12: This. GetHours ()%12,//hours"H +": This. GetHours (),//hours"m+": This. getminutes (),//points"S+": This. getseconds (),//seconds"q+": Math.floor (( This. GetMonth () +3)/3),//Quarterly "S": This. Getmilliseconds ()//milliseconds        }; varWeek = {                "0": "\u65e5",                "1": "\u4e00",                "2": "\u4e8c",                "3": "\u4e09",                "4": "\u56db",                "5": "\u4e94",                "6": "\U516D"             }; if(/(y+)/. Test (FMT)) {FMT=fmt.replace (Regexp.$1, ( This. getFullYear () + ""). substr (4-regexp.$1. length)); }                if(/(e+)/. Test (FMT)) {FMT=fmt.replace (regexp.$1, (regexp.$1.length>1)? (regexp.$1.length>2?) "\u661f\u671f": "\u5468"): "") +week[ This. GetDay () + ""]); }                 for(varKincho) {                        if(NewRegExp ("(" + K + ")"). Test (FMT)) {FMT= Fmt.replace (regexp.$1, (regexp.$1.length==1)? (O[k]): (("XX" + o[k]). substr ("" +o[k])); }                }                returnFMT; }

JS date obtained and formatted