script 版的日期格式函数

emu 2003-05-13 08:30:01

参考了jdk文档中的SimpleDateFormat类做的。实现了一下规则：

Symbol Meaning Presentation Example
------ ------- ------------ -------
G era designator (Text) AD
y year (Number) 1996
M month in year (Number) 07
d day in month (Number) 10
h hour in am/pm (1~12) (Number) 12
H hour in day (0~23) (Number) 0
m minute in hour (Number) 30
s second in minute (Number) 55
S millisecond (Number) 978
E day in week (Text) Tuesday
D day in year (Number) 189
w week in year (Number) 27
W week in month (Number) 2
a am/pm marker (Text) PM
k hour in day (1~24) (Number) 24
K hour in am/pm (0~11) (Number) 0

没有实现的规则是：
M month in year (Text & Number) July & 07
F day of week in month (Number) 2 (2nd Wed in July)
z time zone (Text) Pacific Standard Time
' escape for text (Delimiter)
'' single quote (Literal) '

M规则和F规则不难，但是看的不是很明白到底要来什么结果，所以只部分实现了M。

z规则不知怎么实现。用getTimezoneOffset()的话好像要再找个时区列表后进行映射，太麻烦，算了。

'和''规则要用正则，而且需要考虑到的情况太多，也算了。

所以最后还是留点东西，给后来者完善吧。

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<TITLE>emu's date simple date formatter</TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="emu">
<META NAME="Keywords" CONTENT="date formatter format emu">
<META NAME="Description" CONTENT="A function to format Date object into String">
</HEAD>

<BODY>
<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>
</BODY>
</HTML>

...全文

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dgnApo 2003-05-14

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感谢！！！！！

emu 2003-05-14

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呵呵，没注意到Wednesday有个W在里面。

seabell 2003-05-14

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emu又有精品推出了，收藏！！！：）

一个小地方（W替换的先后顺序）完善了一下
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<TITLE>emu's date simple date formatter</TITLE>
<META NAME="Generator" CONTENT="EditPlus">
<META NAME="Author" CONTENT="emu">
<META NAME="Keywords" CONTENT="date formatter format emu">
<META NAME="Description" CONTENT="A function to format Date object into String">
</HEAD>

<BODY>
<SCRIPT LANGUAGE="JavaScript">

</SCRIPT>
</BODY>
</HTML>

emu 2003-05-13

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因为烦琐啊。做出来了就帖出来，下回别人就不用再发明轮子了。

fason 2003-05-13

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又有新东东出来了,造福人群啊

Reker熊 2003-05-13

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赫赫,emu

你怎麼老喜歡搞這些東西

emu 2003-05-13

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呵呵，M和F规则也实现了：

Date.prototype.format = function (format){
if (format == null) format = "yyyy/MM/dd HH:mm:ss.SSS";
var year = this.getFullYear();
var month = this.getMonth();
var sMonth = ["January","February","March","April","May","June","July","August","September","October","November","December"][month];
var date = this.getDate();
var day = this.getDay();
var hr = this.getHours();
var min = this.getMinutes();
var sec = this.getSeconds();
var daysInYear = Math.ceil((this-new Date(year,0,0))/86400000);
var weekInYear = Math.ceil((daysInYear+new Date(year,0,1).getDay())/7);
var weekInMonth = Math.ceil((date+new Date(year,month,1).getDay())/7);
return format.replace("yyyy",year).replace("yy",year.toString().substr(2)).replace("dd",(date<10?"0":"")+date).replace("HH",(hr<10?"0":"")+hr).replace("KK",(hr%12<10?"0":"")+hr%12).replace("kk",(hr>0&&hr<10?"0":"")+(((hr+23)%24)+1)).replace("hh",(hr>0&&hr<10||hr>12&&hr<22?"0":"")+(((hr+11)%12)+1)).replace("mm",(min<10?"0":"")+min).replace("ss",(sec<10?"0":"")+sec).replace("SSS",this%1000).replace("a",(hr<12?"AM":"PM")).replace("E",["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"][day]).replace("D",daysInYear).replace("w",weekInYear).replace("W",weekInMonth).replace(/MMMM+/,sMonth).replace("MMM",sMonth.substring(0,3)).replace("MM",(month<9?"0":"")+(month+1)).replace("F",Math.ceil(date/7));
}

emu 2003-05-13