JavaScript 日期时间解析
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JavaScript datetime parsing
提问by vtokmak
Possible Duplicate:
How can I convert string to datetime with format specification in JavaScript?
I have a json response which contains a hashmap like;
我有一个 json 响应，其中包含一个哈希图；
{"map":{"2012-10-10 03:47:00.0":23.400000000000002,"2012-10-10 03:52:00.0":23.3,"2012-10-10 03:57:00.0":23.3,"2012-10-10 04:02:00.0":23.3,"2012-10-10 04:07:00.0":23.200000000000003,"2012-10-10 04:13:00.0":23.1,"2012-10-10 04:18:00.0":23.1,"2012-10-10 04:23:00.0":23.0,"2012-10-10 04:28:00.0":23.0,"2012-10-10 04:33:00.0":23.0,"2012-10-10 04:38:00.0":22.900000000000002,"2012-10-10 04:43:00.0":22.8,"2012-10-10 04:48:00.0":22.8,"2012-10-10 04:53:00.0":22.700000000000003,"2012-10-10 04:58:00.0":22.6,"2012-10-10 05:03:00.0":22.6,"2012-10-10 05:08:00.0":22.5,"2012-10-10 05:13:00.0":22.5,"2012-10-10 05:18:00.0":22.5,"2012-10-10 05:23:00.0":22.400000000000002}}
I want to format datetime part of json like;
我想格式化json的日期时间部分；
dd/mm/yyyy HH:mm:ss
日/月/年 HH:mm:ss
Lets assume I put all pair elements like this;
让我们假设我把所有的元素都像这样；
var myArr = [["2012-10-10 03:47:00.0", 23.400000000000002], ["2012-10-10 03:52:00.0", 23.3], ....];
Then, I try to parse datetime part like below and I got Date {Invalid Date}on console;
然后，我尝试解析如下所示的日期时间部分，并在控制台上得到Date {Invalid Date}；
new Date(myArr[0][0]);
How can I format this type of datetime.
如何格式化这种类型的日期时间。
回答by Chase
Try the following:
请尝试以下操作：
new Date(Date.parse(myArr[0][0]));
Use the Date.parsemethod to parse the string into the number of milliseconds since January 1, 1970, 00:00:00 UTC. Take that number of milliseconds and call the Datemethod once again to turn that time into a date object.
使用日期。parse方法将字符串解析为自 1970 年 1 月 1 日 00:00:00 UTC 以来的毫秒数。取该毫秒数并再次调用Date方法以将该时间转换为日期对象。
EDIT:
编辑：
Well this may be a little ugly for this case, but it seems Firefox is having an issue with the -s and the 00.0.
好吧，对于这种情况，这可能有点难看，但 Firefox 似乎在-s 和00.0.
var myArr = [["2012-10-10 03:47:00.0", 23.400000000000002], ["2012-10-10 03:52:00.0", 23.3]];
var date = convertDateTime(myArr[0][0]);
console.log(date);
function convertDateTime(dateTime){
dateTime = myArr[0][0].split(" ");
var date = dateTime[0].split("-");
var yyyy = date[0];
var mm = date[1]-1;
var dd = date[2];
var time = dateTime[1].split(":");
var h = time[0];
var m = time[1];
var s = parseInt(time[2]); //get rid of that 00.0;
return new Date(yyyy,mm,dd,h,m,s);
}
回答by jimbo
function dateFromString(str) {
var m = str.match(/(\d+)-(\d+)-(\d+)\s+(\d+):(\d+):(\d+)\.(\d+)/);
return new Date(+m[1], +m[2] - 1, +m[3], +m[4], +m[5], +m[6] * 100);
}
dateFromString(myArr[0][0]); // Sat Oct 10 2012 03:47:00 GMT-0500 (EST)
