将12小时hh:mm AM / PM转换为24小时hh:mm

时间:2013-02-26 07:23:13

标签: javascript jquery

有没有简单的方法可以使用jquery将12小时hh:mm AM / PM转换为24小时hh:mm?

注意:不使用其他库。

我有var time = $("#starttime").val()返回hh:mm AM / PM。

30 个答案:

答案 0 :(得分:69)

试试这个

var time = $("#starttime").val();
var hours = Number(time.match(/^(\d+)/)[1]);
var minutes = Number(time.match(/:(\d+)/)[1]);
var AMPM = time.match(/\s(.*)$/)[1];
if(AMPM == "PM" && hours<12) hours = hours+12;
if(AMPM == "AM" && hours==12) hours = hours-12;
var sHours = hours.toString();
var sMinutes = minutes.toString();
if(hours<10) sHours = "0" + sHours;
if(minutes<10) sMinutes = "0" + sMinutes;
alert(sHours + ":" + sMinutes);

答案 1 :(得分:31)

这个问题需要一个更新的答案:)

const convertTime12to24 = (time12h) => {
  const [time, modifier] = time12h.split(' ');

  let [hours, minutes] = time.split(':');

  if (hours === '12') {
    hours = '00';
  }

  if (modifier === 'PM') {
    hours = parseInt(hours, 10) + 12;
  }

  return `${hours}:${minutes}`;
}

console.log(convertTime12to24('01:02 PM'));
console.log(convertTime12to24('05:06 PM'));
console.log(convertTime12to24('12:00 PM'));
console.log(convertTime12to24('12:00 AM'));

答案 2 :(得分:19)

我必须做类似的事情,但我正在生成一个Date对象,所以我最终创建了这样的函数:

function convertTo24Hour(time) {
    var hours = parseInt(time.substr(0, 2));
    if(time.indexOf('am') != -1 && hours == 12) {
        time = time.replace('12', '0');
    }
    if(time.indexOf('pm')  != -1 && hours < 12) {
        time = time.replace(hours, (hours + 12));
    }
    return time.replace(/(am|pm)/, '');
}

我认为这看起来更容易一些。您输入格式为h:mm am / pm。

的字符串
    var time = convertTo24Hour($("#starttime").val().toLowerCase());
    var date = new Date($("#startday").val() + ' ' + time);

示例:

        $("#startday").val('7/10/2013');

        $("#starttime").val('12:00am');
        new Date($("#startday").val() + ' ' + convertTo24Hour($("#starttime").val().toLowerCase()));
        Wed Jul 10 2013 00:00:00 GMT-0700 (PDT)

        $("#starttime").val('12:00pm');
        new Date($("#startday").val() + ' ' + convertTo24Hour($("#starttime").val().toLowerCase()));
        Wed Jul 10 2013 12:00:00 GMT-0700 (PDT)

        $("#starttime").val('1:00am');
        new Date($("#startday").val() + ' ' + convertTo24Hour($("#starttime").val().toLowerCase()));
        Wed Jul 10 2013 01:00:00 GMT-0700 (PDT)

        $("#starttime").val('12:12am');
        new Date($("#startday").val() + ' ' + convertTo24Hour($("#starttime").val().toLowerCase()));
        Wed Jul 10 2013 00:12:00 GMT-0700 (PDT)

        $("#starttime").val('3:12am');
        new Date($("#startday").val() + ' ' + convertTo24Hour($("#starttime").val().toLowerCase()));
        Wed Jul 10 2013 03:12:00 GMT-0700 (PDT)

        $("#starttime").val('9:12pm');
        new Date($("#startday").val() + ' ' + convertTo24Hour($("#starttime").val().toLowerCase()));
        Wed Jul 10 2013 21:12:00 GMT-0700 (PDT)

答案 3 :(得分:11)

这里我的解决方案包括秒:

function convert_to_24h(time_str) {
    // Convert a string like 10:05:23 PM to 24h format, returns like [22,5,23]
    var time = time_str.match(/(\d+):(\d+):(\d+) (\w)/);
    var hours = Number(time[1]);
    var minutes = Number(time[2]);
    var seconds = Number(time[3]);
    var meridian = time[4].toLowerCase();

    if (meridian == 'p' && hours < 12) {
      hours += 12;
    }
    else if (meridian == 'a' && hours == 12) {
      hours -= 12;
    }
    return [hours, minutes, seconds];
  };

答案 4 :(得分:6)

这会有所帮助:

 function getTwentyFourHourTime(amPmString) { 
        var d = new Date("1/1/2013 " + amPmString); 
        return d.getHours() + ':' + d.getMinutes(); 
    }

示例:

getTwentyFourHourTime("8:45 PM"); // "20:45"
getTwentyFourHourTime("8:45 AM"); // "8:45"

更新 注意:“时间”和“上午/下午”之间应该有一个时间段空间。

答案 5 :(得分:2)

与此相关的是: 输入示例: 07:05:45 PM 样本输出: 19:05:45

s="686 Middle Street Pollocksville OG 56432"
re.sub(r"(\d+)(.*)\s+([A-Z]+\s+\d+)",r"\3: \2 | \1",s)
Out: 'OG 56432:  Middle Street Pollocksville | 686'

希望您喜欢它!

答案 6 :(得分:2)

我需要这个项目的功能。我尝试了devnull69,但我遇到了一些麻烦,主要是因为字符串输入非常特定于am / pm部分,我需要更改我的验证。我和Adrian P.的jsfiddle搞混了,最后得到了一个版本似乎更适合各种各样的日期格式。这是小提琴:http://jsfiddle.net/u91q8kmt/2/

这是功能:

function ConvertTimeformat(format, str) {
    var hours = Number(str.match(/^(\d+)/)[1]);
    var minutes = Number(str.match(/:(\d+)/)[1]);
    var AMPM = str.match(/\s?([AaPp][Mm]?)$/)[1];
    var pm = ['P', 'p', 'PM', 'pM', 'pm', 'Pm'];
    var am = ['A', 'a', 'AM', 'aM', 'am', 'Am'];
    if (pm.indexOf(AMPM) >= 0 && hours < 12) hours = hours + 12;
    if (am.indexOf(AMPM) >= 0 && hours == 12) hours = hours - 12;
    var sHours = hours.toString();
    var sMinutes = minutes.toString();
    if (hours < 10) sHours = "0" + sHours;
    if (minutes < 10) sMinutes = "0" + sMinutes;
    if (format == '0000') {
        return (sHours + sMinutes);
    } else if (format == '00:00') {
        return (sHours + ":" + sMinutes);
    } else {
        return false;
    }
}

答案 7 :(得分:2)

如果您正在寻找能够正确转换任何格式为24小时HH:MM的解决方案。

function get24hTime(str){
    str = String(str).toLowerCase().replace(/\s/g, '');
    var has_am = str.indexOf('am') >= 0;
    var has_pm = str.indexOf('pm') >= 0;
    // first strip off the am/pm, leave it either hour or hour:minute
    str = str.replace('am', '').replace('pm', '');
    // if hour, convert to hour:00
    if (str.indexOf(':') < 0) str = str + ':00';
    // now it's hour:minute
    // we add am/pm back if striped out before 
    if (has_am) str += ' am';
    if (has_pm) str += ' pm';
    // now its either hour:minute, or hour:minute am/pm
    // put it in a date object, it will convert to 24 hours format for us 
    var d = new Date("1/1/2011 " + str);
    // make hours and minutes double digits
    var doubleDigits = function(n){
        return (parseInt(n) < 10) ? "0" + n : String(n);
    };
    return doubleDigits(d.getHours()) + ':' + doubleDigits(d.getMinutes());
}

console.log(get24hTime('6')); // 06:00
console.log(get24hTime('6am')); // 06:00
console.log(get24hTime('6pm')); // 18:00
console.log(get24hTime('6:11pm')); // 18:11
console.log(get24hTime('6:11')); // 06:11
console.log(get24hTime('18')); // 18:00
console.log(get24hTime('18:11')); // 18:11

答案 8 :(得分:1)

function timeConversion(s) {
  var time = s.toLowerCase().split(':');
  var hours = parseInt(time[0]);
  var _ampm = time[2];
  if (_ampm.indexOf('am') != -1 && hours == 12) {
    time[0] = '00';
  }
  if (_ampm.indexOf('pm')  != -1 && hours < 12) {
    time[0] = hours + 12;
  }
  return time.join(':').replace(/(am|pm)/, '');
}

用字符串参数调用函数:

timeConversion('17:05:45AM')

timeConversion('07:05:45PM')

答案 9 :(得分:1)

我必须推荐一个图书馆:Moment

代码:

var target12 = '2016-12-08 9:32:45 PM';
console.log(moment(target12, 'YYYY-MM-DD h:m:s A').format('YYYY-MM-DD HH:mm:ss'));

答案 10 :(得分:1)

基于会议CodeSkill #1

格式验证应该是另一个功能:)

  

function convertTimeFrom12To24(timeStr) {
  var colon = timeStr.indexOf(':');
  var hours = timeStr.substr(0, colon),
      minutes = timeStr.substr(colon+1, 2),
      meridian = timeStr.substr(colon+4, 2).toUpperCase();
 
  
  var hoursInt = parseInt(hours, 10),
      offset = meridian == 'PM' ? 12 : 0;
  
  if (hoursInt === 12) {
    hoursInt = offset;
  } else {
    hoursInt += offset;
  }
  return hoursInt + ":" + minutes;
}
console.log(convertTimeFrom12To24("12:00 AM"));
console.log(convertTimeFrom12To24("12:00 PM"));
console.log(convertTimeFrom12To24("11:00 AM"));
console.log(convertTimeFrom12To24("01:00 AM"));
console.log(convertTimeFrom12To24("01:00 PM"));

答案 11 :(得分:0)

基于@krzysztof-dąbrowski的http://xyz.ca:10039/MKMSummerCampWS/camp的打字稿解决方案

export interface HoursMinutes {
  hours: number;
  minutes: number;
}
export function convert12to24(time12h: string): HoursMinutes {
  const [time, modifier] = time12h.split(' ');
  let [hours, minutes] = time.split(':');

  if (hours === '12') {
    hours = '00';
  }

  if (minutes.length === 1) {
    minutes = `0${minutes}`;
  }

  if (modifier.toUpperCase() === 'PM') {
    hours = parseInt(hours, 10) + 12 + '';
  }

  return {
    hours: parseInt(hours, 10),
    minutes: parseInt(minutes, 10)
  };
}

答案 12 :(得分:0)

将AM / PM时间字符串转换为24小时格式。 示例9:30 PM到21:30

function get24HrsFrmAMPM(timeStr) {
    if (timeStr && timeStr.indexOf(' ') !== -1 && timeStr.indexOf(':') !== -1) {
        var hrs = 0;
        var tempAry = timeStr.split(' ');
        var hrsMinAry = tempAry[0].split(':');
        hrs = parseInt(hrsMinAry[0], 10);
        if ((tempAry[1] == 'AM' || tempAry[1] == 'am') && hrs == 12) {
            hrs = 0;
        } else if ((tempAry[1] == 'PM' || tempAry[1] == 'pm') && hrs != 12) {
            hrs += 12;
        }
        return ('0' + hrs).slice(-2) + ':' + ('0' + parseInt(hrsMinAry[1], 10)).slice(-2);
    } else {
        return null;
    }
}

答案 13 :(得分:0)

#include <bits/stdc++.h>

using namespace std;

int main(){
    string time;
    int hours,seconds,minutes;
    string merid;
    char delim;
    stringstream ss;

    cin >> time;
    ss << time;
    ss >> hours >> delim >> minutes >> delim >> seconds >> merid;

    if((merid=="PM"&&hours!=12)||(merid=="AM"&&hours==12))
        hours=(hours+12)%24;

    printf("%02d:%02d:%02d", hours, minutes, seconds);

    return 0;
}

答案 14 :(得分:0)

@krzysztof答案的扩展版本,能够按时工作,时间与修饰符之间没有空格。

Tools

答案 15 :(得分:0)

function formatto24(date) {
  let ampm = date.split(" ")[1];
  let time = date.split(" ")[0];
  if (ampm == "PM") {
    let hours = time.split(":")[0];
    let minutes = time.split(":")[1];
    let seconds = time.split(":")[2];
    let hours24 = JSON.parse(hours) + 12;
    return hours24 + ":" + minutes + ":" + seconds;
  } else {
    return time;
  }
}

答案 16 :(得分:0)

希望它对某人有帮助。

/*
 * Complete the timeConversion function below.
 */
function timeConversion(s) {
    /*
     * Write your code here.
     */
    if(s.endsWith("PM")) s=s.substring(0, s.indexOf("PM"))+ " PM";
    if(s.endsWith("AM")) s=s.substring(0, s.indexOf("AM"))+ " AM";

    const d=new Date("2000-01-01 " + s);

    if(s.endsWith("PM") && d.getHours()<12) d.setHours(12); 
    if(s.endsWith("AM") && d.getHours()===12) d.setHours(d.getHours()-12); 

    let result= (d.getHours() < 10 ?  "0" + d.getHours(): d.getHours())+ ":"+   
    (d.getMinutes() <10 ? "0"+ d.getMinutes(): d.getMinutes()) + ":" +     
    (d.getSeconds() <10 ? "0"+ d.getSeconds(): d.getSeconds());

    return result;

}

timeConversion("07:05:45PM")
Sample Test Case
Input
07:05:45PM
Expected Output
19:05:45

答案 17 :(得分:0)

我刚刚在HackerRank上解决了这个问题,所以我在这里分享我的结果

function timeConversion(s) {
    const isPM = s.indexOf('PM') !== -1;
    let [hours, minutes, seconds] = s.replace(isPM ? 'PM':'AM', '').split(':');

    if (isPM) {
        hours = parseInt(hours, 10) + 12;
        hours = hours === 24 ? 12 : hours;
    } else {
        hours = parseInt(hours, 10);
        hours = hours === 12 ? 0 : hours;
        if (String(hours).length === 1) hours = '0' + hours;
    }

    const time = [hours, minutes, seconds].join(':');

    return time;
}

这适用于06:40:03AM之类的输入。

答案 18 :(得分:0)

简短的ES6代码

const convertFrom12To24Format = (time12) => {
  const [sHours, minutes, period] = time12.match(/([0-9]{1,2}):([0-9]{2}) (AM|PM)/).slice(1);
  const PM = period === 'PM';
  const hours = (+sHours % 12) + (PM ? 12 : 0);

  return `${('0' + hours).slice(-2)}:${minutes}`;
}
const convertFrom24To12Format = (time24) => {
  const [sHours, minutes] = time24.match(/([0-9]{1,2}):([0-9]{2})/).slice(1);
  const period = +sHours < 12 ? 'AM' : 'PM';
  const hours = +sHours % 12 || 12;

  return `${hours}:${minutes} ${period}`;
}

答案 19 :(得分:0)

convertTime12to24 = (time12h) => {
        const [time, modifier] = time12h.split(' ');
        let [hours, minutes] = time.split(':');
        (hours === '12' ? hours = '00' : ((modifier === 'PM' || modifier === 'pm') ? hours = parseInt(hours, 10) + 12 : ""));
        return `${hours}:${minutes}`;
      }
      
      
       console.log(convertTime12to24('06:30 pm'));
      
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

答案 20 :(得分:0)

针对所有用例进行了测试

function timeConversion(s) {
let h24;
let m24;
let sec24;

const splittedDate = s.split(":");
const h = parseInt(splittedDate[0], 10);
const m = parseInt(splittedDate[1], 10);
const sec = parseInt(splittedDate[2][0] + splittedDate[2][1], 10); 
const meridiem = splittedDate[2][2] + splittedDate[2][3];

if (meridiem === "AM") {
    if (h === 12) {
        h24 = '00';
    } else {
        h24 = h;
        if (h24 < 10) {
            h24 = '0' + h24;
        }
    }
    m24 = m;
    sec24 = sec;
} else if (meridiem === "PM") {
    if (h === 12) {
        h24 = h
    } else {
        h24 = h + 12;
        if (h24 < 10) {
            h24 = '0' + h24;
        }
    }
    m24 = m;
    sec24 = sec;
}


if (m24 < 10) {
    m24 = '0' + m24; 
} 

if (sec24 < 10) {
    sec24 = '0' + sec24;
}

  return h24 + ":" + m24 + ":" + sec24; 
}

Here is the jsfiddle working example

答案 21 :(得分:0)

date --date="2:00:01 PM" +%T
14:00:01

date --date="2:00 PM" +%T | cut -d':' -f1-2
14:00

var="2:00:02 PM"
date --date="$var" +%T
14:00:02

答案 22 :(得分:0)

实时计算子午线的简单易用js函数

JS

 <label for="end-time">Hour <i id="timeMeridian"></i> </label>
            <input type="time" name="hora" placeholder="Hora" id="end-time" class="form-control" onkeyup="convertTime24to12(this.value)">

HTML

    public class Customer {
       public int CustomerId { get; set; }

       public string CompanyName { get; set; }
    }

    public class ClientUser
    {
        public int ClientUserId { get; set; }

        public string LastName { get; set; }
    }

答案 23 :(得分:0)

对于以后阅读此书的任何人,这是一个简单的答案:

var s = "11:41:02PM";
var time = s.match(/\d{2}/g);
if (time[0] === "12") time[0] = "00";
if (s.indexOf("PM") > -1) time[0] = parseInt(time[0])+12;
return time.join(":");

答案 24 :(得分:0)

我已经创建了一些改编的脚本@ devnull69。我觉得对于我的应用程序来说,它会更有用,它可以返回我可以使用的值,然后用作变量。

<强> HTML

<input type="text" id="time_field" />
<button>Submit</submit>

<强>的jQuery

$(document).ready(function() {

    function convertTime(time) {

        var hours = Number(time.match(/^(\d\d?)/)[1]);
        var minutes = Number(time.match(/:(\d\d?)/)[1]);
        var AMPM = time.match(/\s(AM|PM)$/i)[1];

        if((AMPM == 'PM' || AMPM == 'pm') && hours < 12) {
            hours = hours + 12;
        }
        else if((AMPM == 'AM' || AMPM == "am") && hours == 12) {
            hours = hours - 12;
        }

        var sHours = hours.toString();
        var sMinutes = minutes.toString();

        if(hours < 10) {
            sHours = "0" + sHours;
        }
        else if(minutes < 10) {
             sMinutes = "0" + sMinutes;
        }

        return sHours + ":" + sMinutes;

    }

    $('button').click(function() {
        alert(convertTime($('#time_field').val()));
    });

});

答案 25 :(得分:0)

  function getDisplayDatetime() {
    var d = new Date("February 04, 2011 19:00"),
     hh = d.getHours(),  mm = d.getMinutes(),  dd = "AM", h = hh;
    mm=(mm.toString().length == 1)? mm = "0" + mm:mm;
    h=(h>=12)?hh-12:h;
     dd=(hh>=12)?"PM":"AM";
    h=(h == 0)?12:h;
    var textvalue=document.getElementById("txt");
    textvalue.value=h + ":" + mm + " " + dd;
}

</script>
</head>
<body>
<input type="button" value="click" onclick="getDisplayDatetime()">
<input type="text" id="txt"/>

答案 26 :(得分:0)

dateFormat.masks.armyTime= 'HH:MM';

now.format("armyTime");

答案 27 :(得分:0)

 var time = "9:09:59AM"
    var pmCheck =time.includes("PM");
    var hrs=parseInt(time.split(":")[0]);
    var newtime='';
    // this is for between  12 AM to 12:59:59AM  = 00:00:00
    if( hrs == 12  && pmCheck == false){
        newtime= "00" +':'+ time.split(":")[1] +':'+ time.split(":")[2].replace("AM",'');
        }
    //this is for between  12 PM to 12:59:59 =12:00:00
    else if (hrs == 12  && pmCheck == true){
             newtime= "12" +':'+ time.split(":")[1] +':'+ time.split(":")[2].replace("PM",'');
    }
    //this is for between 1 AM and 11:59:59 AM
    else if (!pmCheck){
        newtime= hrs +':'+ time.split(":")[1] +':'+ time.split(":")[2].replace("AM",'');
    }
    //this is for between 1 PM and 11:59:59 PM
    else if(pmCheck){
        newtime= (hrs +12)+':'+ time.split(":")[1] +':'+ time.split(":")[2].replace("PM",'');
    }
    console.log(newtime);

答案 28 :(得分:0)

function convertTo24Hour(time) {
    time = time.toUpperCase();
    var hours = parseInt(time.substr(0, 2));
    if(time.indexOf('AM') != -1 && hours == 12) {
        time = time.replace('12', '0');
    }
    if(time.indexOf('PM')  != -1 && hours < 12) {
        time = time.replace(hours, (hours + 12));
    }
    return time.replace(/(AM|PM)/, '');
}

答案 29 :(得分:0)

您可以尝试这种更通用的功能:

/manage/thread/7/comments/new

请注意,它使用了一些ES6功能。