如何将Date对象格式化为字符串?


当前回答

简短、广泛兼容的方法:

function formatDate(date) {
    date.toISOString()
    .replace(/^(\d+)-(\d+)-(\d+).*$/, // Only extract Y-M-D
        function (a,y,m,d) {
            return [
                d, // Day
                ['Jan','Feb','Mar','Apr','May','Jun',  // Month Names
                'Jul','Ago','Sep','Oct','Nov','Dec']
                [m-1], // Month
                y  // Year
            ].join('-') // Stitch together
        })
}

或者,作为单行:

date.toISOString().replace(/^(\d+)-(\d+)-(\d+)T(\d+):(\d+):(\d+).(\d+)Z$/, function (a,y,m,d) {return [d,['Jan','Feb','Mar','Apr','May','Jun','Jul','Ago','Sep','Oct','Nov','Dic'][m-1],y].join('-')})

其他回答

这可以帮助:

export const formatDateToString = date => {
    if (!date) {
        return date;
    }
    try {
        return format(parse(date, 'yyyy-MM-dd', new Date()), 'dd/MM/yyyy');
    } catch (error) {
        return 'invalid date';
    }
};

为了将日期格式化为例如2010年8月10日,您可能需要使用.toDateString()和ES6数组析构函数。

const formattedDate = new Date().toDateString()
// The above yields e.g. 'Mon Jan 06 2020'

const [, month, day, year] = formattedDate.split(' ')

const ddMmmYyyy = `${day}-${month}-${year}`
// or
const ddMmmYyyy = [day, month, year].join('-')

一个简单的函数,可以返回日期、日期+时间或仅返回时间:

var myDate = dateFormatter("2019-01-24 11:33:24", "date-time");
// >> RETURNS "January 24, 2019 11:33:24"

var myDate2 = dateFormatter("2019-01-24 11:33:24", "date");
// >> RETURNS "January 24, 2019"

var myDate3 = dateFormatter("2019-01-24 11:33:24", "time");
// >> RETURNS "11:33:24"


function dateFormatter(strDate, format){
    var theDate = new Date(strDate);
    if (format=="time")
       return getTimeFromDate(theDate);
    else{
       var dateOptions = {year:'numeric', month:'long', day:'numeric'};
       var formattedDate = theDate.toLocaleDateString("en-US", + dateOptions);
       if (format=="date")
           return formattedDate;
       return formattedDate + " " + getTimeFromDate(theDate);
    }
}

function getTimeFromDate(theDate){
    var sec = theDate.getSeconds();
    if (sec<10)
        sec = "0" + sec;
    var min = theDate.getMinutes();
    if (min<10)
        min = "0" + min;
    return theDate.getHours() + ':'+ min + ':' + sec;
}

如果您需要使用普通JavaScript快速格式化日期,请使用getDate、getMonth+1、getFullYear、getHours和getMinutes:

var d = new Date();

var datestring = d.getDate()  + "-" + (d.getMonth()+1) + "-" + d.getFullYear() + " " +
d.getHours() + ":" + d.getMinutes();

// 16-5-2015 9:50

或者,如果需要用零填充:

var datestring = ("0" + d.getDate()).slice(-2) + "-" + ("0"+(d.getMonth()+1)).slice(-2) + "-" +
    d.getFullYear() + " " + ("0" + d.getHours()).slice(-2) + ":" + ("0" + d.getMinutes()).slice(-2);

// 16-05-2015 09:50

Use:

thisDate = new Date(parseInt(jsonDateString.replace('/Date(', '')));
formattedDate = (thisDate.getMonth() + 1) + "/" + (thisDate.getDate()+1) + "/" + thisDate.getFullYear();

这采用JSON日期“/date(1429573751663)/”,并生成格式化字符串:

"4/21/2015"