Java 如何从 HTTP Last-Modified 标头解析日期？
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How to parse Date from HTTP Last-Modified header?
提问by levanovd
HTTP Last-Modified header contains date in following format (example):Wed, 09 Apr 2008 23:55:38 GMT
What is the easiest way to parse java.util.Datefrom this string?
HTTP Last-Modified 标头包含以下格式的日期（示例）：从该字符串Wed, 09 Apr 2008 23:55:38 GMT
解析java.util.Date的最简单方法是什么？
采纳答案by Shaun
This should be pretty close
这应该很接近
String dateString = "Wed, 09 Apr 2008 23:55:38 GMT";
SimpleDateFormat format = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz");
Date d = format.parse(dateString);
回答by Bozho
DateUtil.parseDate(dateString)from apache http-components
DateUtil.parseDate(dateString)来自 apache http-components
(legacy: DateUtil.parseDate(dateString)(from apache commons-httpclient))
（遗留：（DateUtil.parseDate(dateString)来自 apache commons-httpclient））
It has the correct format defined as a Constant, which is guaranteed to be compliant with the protocol.
它具有定义为常量的正确格式，保证符合协议。
回答by ralfstx
RFC 2616 defines three different date formats that a conforming client must understand.
RFC 2616 定义了符合要求的客户端必须理解的三种不同的日期格式。
The Apache HttpClient provides a DateUtil that complies with the standard:
Apache HttpClient 提供了一个符合标准的 DateUtil：
Date date = DateUtils.parseDate( headerValue );
Date date = DateUtils.parseDate( headerValue );
回答by Jin Kwon
If you're using URLConnections, there is already a handy method.
如果您使用URLConnection的是s，那么已经有一个方便的方法了。
See URLConnection#getLastModified
见 URLConnection#getLastModified
This method parses the date string and returns a milliseconds value. Then you can happily create a Datewith that value.
此方法解析日期字符串并返回毫秒值。然后你可以愉快地创建一个Date具有该值的。
回答by Stan Svec
java.time
时间
When using the new Java Date and Time APIthe code would simply be:
使用新的Java 日期和时间 API 时，代码将是：
ZonedDateTime zdt = ZonedDateTime.parse("Wed, 09 Apr 2008 23:55:38 GMT", DateTimeFormatter.RFC_1123_DATE_TIME);
The DateTimeFormatterclass pre-defines a constant for that particular format in RFC_1123_DATE_TIME. As the name suggests, RFC 1123defines that format.
所述DateTimeFormatter类预定义了该特定格式的恒定RFC_1123_DATE_TIME。顾名思义，RFC 1123定义了该格式。
