如何計算 24 小時格式的兩個時間之間的差異？

Question

在 JavaScript 中，如何計算 24 小時格式的兩個時間之間的差異？

示例：獲取從08:00:00到23:00:00經過了多少小時。

下面我從兩個下拉菜單中獲取兩個時間值，並嘗試計算兩個時間之間的小時差。 我得到錯誤的結果...

工作示例： http://jsfiddle.net/VnwF7/1/

腳本：

$(document).ready(function() {
    function calculateTime() {
             //get values
        var valuestart = $("select[name='timestart']").val();
        var valuestop = $("select[name='timestop']").val();

             //create date format       
        var timeStart = new Date("01/01/2007 " + valuestart);
        var timeEnd = new Date("01/01/2007 " + valuestop);

        var difference = timeEnd - timeStart;            
        var diff_result = new Date(difference);    

        var hourDiff = diff_result.getHours();

        $("p").html("<b>Total Hours:</b> " + hourDiff )          
    }
    $("select").change(calculateTime);
    calculateTime();
});

HTML：

<select name="timestart">
<option value="00:00:00">12:00 am</option>
<option value="01:00:00">1:00 am</option>
<option value="02:00:00">2:00 am</option>
<option value="03:00:00">3:00 am</option>
<option value="04:00:00">4:00 am</option>
<option value="05:00:00">5:00 am</option>
<option value="06:00:00">6:00 am</option>
<option value="07:00:00">7:00 am</option>
<option value="08:00:00">8:00 am</option>
<option value="09:00:00">9:00 am</option>
<option value="10:00:00">10:00 am</option>
<option value="11:00:00">11:00 am</option>
<option value="12:00:00">12:00 pm</option>
<option value="13:00:00">1:00 pm</option>
<option value="14:00:00">2:00 pm</option>
<option value="15:00:00">3:00 pm</option>
<option value="16:00:00">4:00 pm</option>
<option value="17:00:00">5:00 pm</option>
<option value="18:00:00">6:00 pm</option>
<option value="19:00:00">7:00 pm</option>
<option value="20:00:00">8:00 pm</option>
<option value="21:00:00">9:00 pm</option>
<option value="22:00:00">10:00 pm</option>
<option value="23:00:00">11:00 pm</option>
</select>

<select name="timestop">
<option value="00:00:00">12:00 am</option>
<option value="01:00:00">1:00 am</option>
<option value="02:00:00">2:00 am</option>
<option value="03:00:00">3:00 am</option>
<option value="04:00:00">4:00 am</option>
<option value="05:00:00">5:00 am</option>
<option value="06:00:00">6:00 am</option>
<option value="07:00:00">7:00 am</option>
<option value="08:00:00">8:00 am</option>
<option value="09:00:00">9:00 am</option>
<option value="10:00:00">10:00 am</option>
<option value="11:00:00">11:00 am</option>
<option value="12:00:00">12:00 pm</option>
<option value="13:00:00">1:00 pm</option>
<option value="14:00:00">2:00 pm</option>
<option value="15:00:00">3:00 pm</option>
<option value="16:00:00">4:00 pm</option>
<option value="17:00:00">5:00 pm</option>
<option value="18:00:00">6:00 pm</option>
<option value="19:00:00">7:00 pm</option>
<option value="20:00:00">8:00 pm</option>
<option value="21:00:00">9:00 pm</option>
<option value="22:00:00">10:00 pm</option>
<option value="23:00:00">11:00 pm</option>
</select>

<p></p>

Answer 1

您可以通過這種方式立即減去時間

var valuestart = $("select[name='timestart']").val();
var valuestop = $("select[name='timestop']").val();

//create date format          
var timeStart = new Date("01/01/2007 " + valuestart).getHours();
var timeEnd = new Date("01/01/2007 " + valuestop).getHours();

var hourDiff = timeEnd - timeStart;             

這是工作小提琴http://jsfiddle.net/VnwF7/4/

更新 - 計算我們是否包括第二天。 只需添加以下 if 塊

 if (hourDiff < 0) {
    hourDiff = 24 + hourDiff;
 }

http://jsfiddle.net/gfvhqat9/

Answer 2

試試這個

var time_start = new Date();
var time_end = new Date();
var value_start = "06:00:00".split(':');
var value_end = "23:00:00".split(':');

time_start.setHours(value_start[0], value_start[1], value_start[2], 0)
time_end.setHours(value_end[0], value_end[1], value_end[2], 0)

time_end - time_start // millisecond 

Answer 3

我更改了您的代碼以僅使用差異而無需創建另一個日期對象：

$(document).ready(function() {    
function calculateTime() {
        //get values
        var valuestart = $("select[name='timestart']").val();
        var valuestop = $("select[name='timestop']").val();

         //create date format          
         var timeStart = new Date("01/01/2007 " + valuestart);
         var timeEnd = new Date("01/01/2007 " + valuestop);

         var difference = timeEnd - timeStart;             

         difference = difference / 60 / 60 / 1000;


    $("p").html("<b>Hour Difference:</b> " + difference)             

}
$("select").change(calculateTime);
calculateTime();
});​

Answer 4

它不是 Jquery，而是 JavaScript 中與時間和日期相關的所有內容......

這可能有幫助：datejs http://code.google.com/p/datejs/

這是文檔中的一些日期和時間計算

 Date.today().set({ day: 15 })          // Sets the day to the 15th of the current month and year. Other object values include year|month|day|hour|minute|second.

        Date.today().set({ year: 2007, month: 1, day: 20 })


Date.today().add({ days: 2 })          // Adds 2 days to the Date. Other object values include year|month|day|hour|minute|second.

        Date.today().add({ years: -1, months: 6, hours: 3 })


Date.today().addYears(1)               // Add 1 year.
Date.today().addMonths(-2)             // Subtract 2 months.
Date.today().addWeeks(1)               // Add 1 week
Date.today().addHours(6)               // Add 6 hours.
Date.today().addMinutes(-30)           // Subtract 30 minutes
Date.today().addSeconds(15)            // Add 15 seconds.
Date.today().addMilliseconds(200)      // Add 200 milliseconds.

Date.today().moveToFirstDayOfMonth()   // Returns the first day of the current month.
Date.today().moveToLastDayOfMonth()    // Returns the last day of the current month.

new Date().clearTime()                 // Sets the time to 00:00 (start of the day).
Date.today().setTimeToNow()            // Resets the time to the current time (now). The functional opposite of .clearTime()

編輯：因為這是一個相當古老的答案，我最近也確實使用 moment.js 進行與日期相關的操作，這也非常有用。 http://momentjs.com/ https://github.com/moment/moment/

Answer 5

對於這種特定情況，您不需要將它們轉換為日期。 就這樣做

$(document).ready(function() {    
    function calculateTime() { 
        var hourDiff = 
        parseInt($("select[name='timestart']").val().split(':')[0],10) -         
        parseInt($("select[name='timestop']").val().split(':')[0],10);

        $("p").html("<b>Hour Difference:</b> " + hourDiff )         
    }
    $("select").change(calculateTime);
    calculateTime();
});

工作小提琴

Answer 6

這段代碼對我有用，代碼是通過考慮 AM PM 差異編寫的。 只需根據您喜歡的格式編寫日期並嘗試使用此代碼

 function getTimeDifference(startTime, endTime) { const difference = endTime - startTime; const differenceInMinutes = difference / 1000 / 60; let hours = Math.floor(differenceInMinutes / 60); if (hours < 0) { hours = 24 + hours; } let minutes = Math.floor(differenceInMinutes % 60); if (minutes < 0) { minutes = 60 + minutes; } const hoursAndMinutes = hours + ":" + (minutes < 10? '0': '') + minutes; return hoursAndMinutes; } const start = new Date(0,0,0,23,15); const end = new Date(0,0,0,1,30); const difference = getTimeDifference(start, end); console.log(difference);