在两个日期与百分比之间计算

Question

我想计算两个日期之间的差异与百分比。只是没有日期，需要小时才能扩展。 例：

22-08-2017 09:00 start date,
30.09.2017 22:00 finish date,

今天的日期是01.09.2017。当我今天查看系统时，应用程序向我显示"%47% 已完成"我想要这个。

Answer 1

function getpercent(){
var strt = new Date(document.getElementById('start').value).getTime();
var end = new Date(document.getElementById('end').value).getTime();
var current = new Date(document.getElementById('current').value).getTime();
var completed = ((current - strt) / (end - strt)) * 100;
document.getElementById('percent').innerHTML = completed+"%";
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<p>start <input id="start" type="date" /></p>
<p>end <input id="end" type="date" /></p>
<p>current <input id="current" type="date" /></p>
<p>percent   <span id="percent"></span></p>
<button onclick="getpercent()">get percent</button>

new Date(( 将采用一个日期字符串并将其转换为 UNIX 标准时间作为秒。

Answer 2

javascript Date 对象可用于算术表达式。它将转换为毫秒。

var start, finish, midpoint, percent, elapsed;
start = new Date(2017, 8, 22, 9);
finish = new Date(2017, 9, 30, 22);
midpoint = new Date(2017, 8, 29, 12);
elapsed = midpoint - start;
percent = (elapsed / (finish - start)) * 100;
console.log('elapsed', elapsed, ' ms', percent, ' % complete');

https://jsfiddle.net/fwb3g4nc/1/

Answer 3

这是一个简单的类DiffTracker，它接受构造函数中的两个日期 -start和end日期，并具有一个方法getPercentage()该方法将返回从开始日期经过的小时数与start到end日期之间的总小时数的百分比。

让我们看看下面的场景：

开始日期 = 2017-08-23 09：00

结束日期 = 2017-08-24 09：00

所以现在小时的总差是24

如果我们调用日期为 2017-08-24 21：00 的getPercentage()，我们应该看到50%的结果。 如果我们调用日期为 2017-08-24 03：00 的getPercentage()，我们应该看到75%的结果，因为差异为 18 小时

var diffTraker = new DiffTracker(new Date(2017, 7, 23, 9), new Date(2017, 7, 24, 9));
console.log('Start Date');
console.log(new Date(2017, 7, 23, 9));
console.log('-------------------');
console.log('End Date');
console.log(new Date(2017, 7, 24, 9));
console.log('-------------------');
console.log(diffTraker.getPercentage(new Date(2017, 7, 23, 21)) + '% from start date (' + new Date(2017, 7, 23, 21) + ')');
console.log(diffTraker.getPercentage(new Date(2017, 7, 24, 3)) + '% from start date (' + new Date(2017, 7, 24, 3) + ')');
console.log(diffTraker.getPercentage(new Date(2017, 7, 24, 5)) + '% from start date (' + new Date(2017, 7, 24, 5) + ')');
function DiffTracker(startDate, endDate){
var self = this;
self.start = startDate;
self.end = endDate;
self.totalHours =  getDiffHours(self.start, self.end);

self.getPercentage = function(date){
var hoursFromStart = getDiffHours(self.start, date);
return (hoursFromStart * 100 / self.totalHours).toFixed(2);
}

function getDiffHours(start, end){
/* 36e5 is the scientific notation for 60*60*1000, dividing by which converts the milliseconds difference into hours */
return Math.abs(start - end) / 36e5;
}
}

Answer 4

$FirstDate = ">22-08-201709：00"; $SecondDate = "23.09.201722：00";

即使有一天它显示 100%

Answer 5

在 php 中，我使用此方法：

<?php
$FirstDate = "22-08-2017 09:00";
$SecondDate = "30.09.2017 22:00";
$start = strtotime($FirstDate);
$finish = strtotime($SecondDate);
$diff = $finish - $start;
$progress = time() - $start; // You might have to modify the time function depending on where you live
$procent = ($progress / $diff) * 100;
$width = round($procent);
// The if statment below just makes sure that it does not show 110% for example.
if ($width >= 100)
{
echo "100 %";
}
else
{
echo $width;
}

希望这有帮助！