Stange javascript Date 在特定日期的行为 [英] Stange javascript Date behaviour on particular dates

问题描述

我注意到 javascript 在管理此特定日期时的一种奇怪行为

i noticed a strange behave of javascript on manging this particular Date

"31-12-2017 23:59:59"

我有一个 API，我调用它并将一些日期作为字符串返回给我，我必须使用 js 将它们转换为 Date.

i have an API which i call and returns me some date as String, and i have to cast them to Date using js.

我的代码就是这样

while (i<array.length){
                                array[i].start_date = new Date (array[i].start_date);
                                array[i].start_date.setHours(array[i].start_date.getHours()+1);
                                array[i].start_date = $filter('date')(array[i].start_date, "dd-MM-yyyy HH:mm:ss");

                                array[i].end_date = new Date (array[i].end_date);
                                array[i].end_date.setHours(array[i].end_date.getHours()+1);
                                array[i].end_date = $filter('date')(array[i].end_date, "dd-MM-yyyy HH:mm:ss");  
                                $scope.insSupplies.push(array[i]);

                        i++;
                    };

其中 array 是我正在质疑的 API.

where array is the API i'm questioning.

这里的问题是当我的代码尝试这个时

The problem here is that when my code tries this

array[i].end_date = new Date (array[i].end_date);

在这一天

"31-12-2017 23:59:59"

array[i].end_date 变成 Invalid Date

这是怎么发生的?

var date = "31-12-2017 23:59:59"
var dateSplitted = date.split("-");
var dateInverted = dateSplitted[1] +"-" +dateSplitted[0] +"-"+dateSplitted[2];
dateSplitted = dateInverted.split(" ");
alert(dateSplitted[0]+"T"+dateSplitted[1]+"Z");
alert(new Date(dateSplitted[0]+"T"+dateSplitted[1]+"Z"));

我实现了这个粗略的方法来解析我的日期，但我不明白怎么回事有什么帮助吗?

I implemented this rough method to parse my date, but i don't get how is wrong Any help?

推荐答案

我不知道这里发生了什么问题.但解决方案是您的月份和日期格式被错误地转换.

I don't know what is the issue going on here. But the solution is your month and date format is wrongly placed to convert.

您的日期格式应为 12-31-2017 23:59:59 而不是 31-12-2017 23:59:59.比如mm/dd/yyyy.可能它的工作原理类似于您的浏览器默认日期格式.

Your date format should be 12-31-2017 23:59:59 instead of 31-12-2017 23:59:59. like mm/dd/yyyy. may be it's works like your browser default date format.

您可以在警报结果下方查看此内容.

you can check this below alert results.

alert(new Date("12-31-2017 23:59:59"))// this is a correct format.

alert(new Date("31-12-2017 23:59:59"))// here `31` is month. The default month count is 12. but here it's automatically add 19 months into 12 month(31-12). So it will go to future year.

alert(new Date("13-12-2017 23:59:59"))// here you can check the result of Jan month 2018 

您应该在转换前交换月份和日期.试试下面的代码

You should swap the month and date before convert. try this below code

 

var date= "31-12-2017 23:59:59".split("-");

var newDate = date[1] +"-" +date[0] +"-" +date[2];

alert(new Date(newDate));

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