java If-Modified-Since 日期格式
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If-Modified-Since Date Format
提问by Ken
I am writing a server and I would like to check for "If-Modified-Since: " header.
Since there are so many date methods, which methods should I consider to check, like a usual method (milliseconds is used in browsers)....
我正在编写一个服务器，我想检查“If-Modified-Since：”标题。
由于日期方法太多，我应该考虑检查哪些方法，就像通常的方法（浏览器中使用毫秒）...
Following is how I did it for milliseconds format:
以下是我对毫秒格式的处理方式：
Date date;
//dateS is a substring of If-Modified-Since: header
try{
long mills = Long.parseLong(dateS);
} catch (NumberFormatException e)
{e.printStackTrace();
}
date = new Date(mills);
I also want to check for "Wed, 19 Oct 2005 10:50:00 GMT" format. How can I change that date into milliseconds?
我还想检查“2005 年 10 月 19 日星期三 10:50:00 GMT”格式。如何将该日期更改为毫秒？
SimpleDateFormat dateFormat = new SimpleDateFormat(
"EEE, dd MMM yyyy HH:mm:ss z");
// to check if-modified-since time is in the above format
try {
ifModifiedSince = dateFormat.parse(date);
?????????????????????
} catch (ParseException e1) {
}
Please help me with chaging the above and please tell me if there is any Date format that I should check for…
请帮我修改以上内容，并告诉我是否有任何日期格式需要检查……
回答by MannVoo
HTTP applications have historically allowed three different formats for the representation of date/time stamps:
HTTP 应用程序历来允许使用三种不同的格式来表示日期/时间戳：
Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123
Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format
More details in HTTP/1.1 RFC 2616.
HTTP/1.1 RFC 2616 中的更多详细信息。
回答by Reimeus
As you already have the Dateobject, you can use:
由于您已经拥有该Date对象，您可以使用：
long timeInMillis = ifModifiedSince.getTime();
