如何将日期时间格式转换为JavaScript中的另一种格式？

Question

I have a date time string like this

8/14/2015 7:26 AM , for example, in javascript how can I convert that to this format March 30, 2015 11:31 AM ?

Thanks

Answer 1

Can't see any reason to use an external library for what is just a few lines of code. Playing around in the console can be good for things like this, since Chrome at least, will show you the available methods that an object has, saving you much time researching MDN/w3schools.

Eg type var tmp = new Date(); into the console. Now, type tmp. and you should see a massive drop-down list of the methods that a Date object has.

Anyway, to solve the problem you present you may use code of the following form. I've not done any error-checking, that's left as an exercise for the reader.

function dateTest()
{
    var initialDateStr = "8/14/2015 7:26 AM";
    var months = ['January', 'February', 'March', 'April', 'May', 'June',
                  'July', 'August', 'Setember', 'October', 'November', 'December'];

    var dateObj = new Date(initialDateStr);

    var outputString = months[ dateObj.getMonth() ] + ' ';
    outputString += dateObj.getDate() + ', ';
    outputString += (dateObj.getYear()+1900) + ' ';

    var hrs12 = dateObj.getHours();
    if (hrs12 > 13)
        outputString += (hrs12-12) + ':';
    else
        outputString += (hrs12) + ':';

    outputString += dateObj.getMinutes() + ' ';

    if (hrs12 > 11)
        outputString += 'PM';
    else
        outputString += 'AM';

    console.log( outputString );
    //August 14, 2015 7:26 AM
}

Answer 2

您可以在此处找到用于此方案的外部开源库