用gmt解析的日期+ 2小时 [英] Date parsed with gmt + 2 hours

问题描述

使用 var date = new Date(timestring)时，我总是得到错误的日期，总是有+2 GMT小时.

I always get the wrong date when I use var date = new Date(timestring), there is always +2 GMT hours.

var unsortedPlayTimes =
    [{date:'2014-08-11T09:30:00'},
        {date:'2014-08-11T08:30:00'},
        {date:'2014-08-11T08:15:00'},
        {date:'2014-08-11T08:45:00'},
        {date:'2014-08-11T12:30:00'},
        {date:'2014-08-11T10:30:00'},
        {date:'2014-08-11T11:30:00'},
        {date:'2014-08-11T07:30:00'},
        {date:'2014-08-11T13:00:00'},
        {date:'2014-08-11T23:00:00'},
        {date:'2014-08-12T00:00:00'},
        {date:'2014-08-12T01:00:00'},
        {date:'2014-08-12T05:00:00'},
        {date:'2014-08-12T09:00:00'},
        {date:'2014-08-11T14:00:00'},
        {date:'2014-08-11T18:30:00'},
        {date:'2014-08-11T13:00:00'}];

function SortandFilterPlayTimes (allPlayTimes) {
    var filteredPlayTimes = [];
    $.each(allPlayTimes, function(index, value) {
        var date = new Date(value.date);

        if ($.inArray(date,filteredPlayTimes) === -1) {
            filteredPlayTimes.push(date);
        }
    });
};

为什么JavaScript总是将这两个小时加在一起?

Why is JavaScript always adding this +2 hours ?

推荐答案

您正在使用 ISO-8601格式化日期，同时省略时区，这使解析在ES5中将时区视为UTC (在ES6中会有所不同:如果未提供时区，ISO格式的字符串也将被视为本地).

You're using the ISO-8601 formatting of dates while omitting the timezone, this makes the parsing consider the timezone as UTC in ES5 (this will be different in ES6 : strings in ISO format will be considered as local too when the timezone isn't provided).

如果您希望将日期与ES5中的本地时区一起解析，则可以将格式更改为非ISO格式:

If you want the date to be parsed with your local timezone in ES5, you might change the format to a not ISO one :

var date = new Date(value.date.replace(/T/,' '));

但是您可能还想根据用户的时区检查您是否真的要解析日期，这通常是一个坏主意.通常，好的解决方案是发送时区或将日期作为unix时间戳发送(使用 date.getTime()获得的信息).

But you might also want to check you really want the date to be parsed depending on the user's timezone, this is most often a bad idea. The usual good solution is to send the timezone or to send the date as a unix timestamp (what you get with date.getTime()).

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