Date format of chat's start Attribute for collection item or message may be wrong ?? (#27)

Date format of chat's start Attribute for collection item or message may be wrong ?? (#27)

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	veiky sun opened 8 years ago One in AbstractMessageArchiveRepository `formatter2 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ"） ... formattedStart = formatter2.format(start);` Another in TimestampHelper `formatter2 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssZ"); ... public static String format(Date ts) { synchronized (formatter2) { return formatter2.format(ts); } }` "yyyy-MM-dd'T'HH:mm:ssZ" will format date to string like "2016-02-24T16:52:13+0000" but "yyyy-MM-dd'T'HH:mm:ss'Z'" will format date to string like "2016-02-24T16:52:13+00:00", as is protocoled in http://xmpp.org/extensions/xep-0136.html#manage-list http://xmpp.org/extensions/xep-0082.html#sect-idp621488 TZD Time Zone Definition (either "Z" for UTC or "(+\|-)hh:mm" for a specific time zone) A string like "2016-02-24T16:52:13+0000" cannt be Deserialized by some other xmpp softwares
	Andrzej Wójcik (Tigase) commented 8 years ago I fixed format of timestamp by changing `yyyy-MM-dd'T'HH:mm:ssZ` to `yyyy-MM-dd'T'HH:mm:ssXXX` and @yyyy-MM-dd'T'HH:mm:ssXX@. First one properly handles timestamps like `2016-02-24T16:52:13+01:00` and `2016-02-24T16:52:13Z@, while second one handles @2016-02-24T16:52:13+0100` anf @2016-02-24T16:52:13Z@. This way Tigase Message Archiving component will properly handle format described at http://xmpp.org/extensions/xep-0082.html#sect-idp621488 and format which was handled until now (for backward compatibility). From now on Tigase Message Archiving component will return timestamps in following form `2016-02-24T16:52:13Z` Usage of format string suggested in task description is not possible. `yyyy-MM-dd'T'HH:mm:ss'Z'` will result in formatting time properly however will lead to timezone information being lost (especially as in some cases this formatter is also used for parsing timestamps!)
	veiky sun commented 8 years ago 官方阿迪达斯新店开张大促销了，三折呀，还有情侣款，我卖了两双，去验过是正品，很满意~！http://st.zzaa.org This is an automatic reply, confirming that your e-mail was received.Thank you `邮箱使用小提示想让对方更及时看到你的邮件，可以试试发到"对方手机号@163.com"。无需事先开通，还有短信提醒。了解网易手机邮箱详情`

Type	Bug
Priority	Major
Assignee	veiky sun
RedmineID	4188

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tigase/_server/tigase-message-archiving#27

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