25

在 JavaScript 中,如何计算 24 小时格式的两个时间之间的差异?

08:00:00示例:获取从到过去了多少小时23:00:00

下面我从两个下拉菜单中获取两个时间值,并尝试计算两个时间之间的小时差。我得到错误的结果...

工作示例:http: //jsfiddle.net/VnwF7/1/

脚本:

$(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>
4

5 回答 5

41

您可以通过这种方式立即减去时间

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;             

这是工作小提琴http://jsfiddle.net/VnwF7/4/

更新 - 计算我们是否包括第二天。只需添加以下 if 块

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

http://jsfiddle.net/gfvhqat9/

于 2012-06-14T17:31:08.607 回答
7

我将您的代码更改为仅使用差异而无需创建另一个日期对象:

$(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();
});​
于 2012-06-14T17:32:39.450 回答
7

试试这个方法

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 
于 2018-08-10T10:45:37.863 回答
3

它不是 Jquery,而是与 JavaScript 中的时间和日期相关的所有内容......

这可能会有所帮助:datejs http://code.google.com/p/datejs/

这是文档中的一些日期和时间计算

 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()

编辑:由于这是一个相当古老的答案,我最近也使用 moment.js 进行与日期相关的操作,这也非常有用。 http://momentjs.com/ https://github.com/moment/moment/

于 2012-06-14T17:33:37.563 回答
3

对于这种特定情况,您不需要将它们转换为日期。就这样做

$(document).ready(function() {    
    function calculateTime() { 
        var hourDiff = 
        parseInt($("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</p>

于 2012-06-14T17:36:06.123 回答