Javascript javascript检查结束日期大于或等于开始日期
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/6135433/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
javascript check end date is greater than or equal to start date
提问by user517406
Is it possible to check whether an end date is greater than or equal to a start date in Javascript? My dates are strings in the format 'dd/mm/yyyy'.
是否可以检查结束日期是否大于或等于 Javascript 中的开始日期？我的日期是“dd/mm/yyyy”格式的字符串。
回答by niksvp
try this
尝试这个
var startDate = "05/01/2011";
var endDate = "09/01/2011";
var regExp = /(\d{1,2})\/(\d{1,2})\/(\d{2,4})/;
if(parseInt(endDate.replace(regExp, "")) > parseInt(startDate.replace(regExp, ""))){
alert("greater");
}
回答by KooiInc
If the string format ('dd/mm/yyyy') doesn't change, this function should work:
如果字符串格式 ('dd/mm/yyyy') 没有改变，这个函数应该可以工作：
function endAfterStart(start,end){
return new Date(start.split('/').reverse().join('/')) <
new Date(end.split('/').reverse().join('/'));
}
alert(endAfterStart('05/01/2011','09/01/2011')); //=> true
Or extend the Date.prototype:
或扩展Date.prototype：
Date.prototype.isBefore = Date.prototype.isBefore || function(dat){
return this < dat;
}
new Date('05/01/2011'.split('/').reverse().join('/'))
.before( new Date('09/01/2011'.split('/').reverse().join('/')) ); //=>true
回答by Richard Christensen
Most simple way to do this.
最简单的方法来做到这一点。
function endAfterStart(start, end) {
var startDate = new Date(start);
var endDate = new Date(end);
return endDate.getTime() >= startDate.getTime();
}
回答by razor
function isDate(value)
{
var fromDate = document.getElementById("fromDate").value
var toDate= document.getElementById("toDate").value
//var curr_Date= new SimpleDateFormat("dd/mm/yyyy");
var dateRegEx = null;
dateRegEx = new RegExp(/^(((0[1-9]|[12]\d|3[01])\/(0[13578]|1[02])\/((19|[2-9]\d)\d{2}))|((0[1-9]|[12]\d|30)\/(0[13456789]|1[012])\/((19|[2-9]\d)\d{2}))|((0[1-9]|1\d|2[0-8])\/02\/((19|[2-9]\d)\d{2}))|(29\/02\/((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$/g);
if (dateRegEx.test(fromDate)){
}
else{
alert("Invalid from date");
return false;
}
dateRegEx = new RegExp(/^(((0[1-9]|[12]\d|3[01])\/(0[13578]|1[02])\/((19|[2-9]\d)\d{2}))|((0[1-9]|[12]\d|30)\/(0[13456789]|1[012])\/((19|[2-9]\d)\d{2}))|((0[1-9]|1\d|2[0-8])\/02\/((19|[2-9]\d)\d{2}))|(29\/02\/((1[6-9]|[2-9]\d)(0[48]|[2468][048]|[13579][26])|((16|[2468][048]|[3579][26])00))))$/g);
if(dateRegEx.test(toDate)) {
}
else{
alert("Invalid to date");
return false;
}
var stDate = new Date(fromDate);
var enDate = new Date(toDate);
var compDate = enDate - stDate;
//var fdate=enDate-curr_Date;
if(compDate >= 0)
return true;
else
{
alert("To Date cannot be smaller than From Date");
return false;
}
/**/
}
This will work for Leap years also..in dd/mm/yyyy format(not any other format).
这也适用于闰年......以 dd/mm/yyyy 格式（不是任何其他格式）。
回答by Ga???
Took me some time to find, but JQuery implements this exact functionality with DatePickerdate-range. (Source code available in link as well.)
我花了一些时间才找到，但 JQuery 使用. （链接中也提供了源代码。）DatePickerdate-range
Moment.jsalso handles date comparisons very well using the difffunction.
回答by Ga???
Try this,
尝试这个，
function isDateCompare(){
var leadDate = document.getElementById('strDate').value;
var closeDate = document.getElementById('strDateClosed').value;
var date1 = new Date();
date1.setFullYear(leadDate.substr(6,4),(leadDate.substr(3,2)-1),leadDate.substr(0,2));
var date2 = new Date();
date2.setFullYear(closeDate.substr(6,4),(closeDate.substr(3,2)-1),closeDate.substr(0,2));
if (date1> date2)
{
alert("Expected Closed date cannot be less than Lead date.");
return false;
}
else
{
alert("true");
return false;
}
}
回答by developer
check out this function
看看这个功能
function CompareDates()
{
var str1 = document.getElementById("Fromdate").value;
var str2 = document.getElementById("Todate").value;
var dt1 = parseInt(str1.substring(0,2),10);
var mon1 = parseInt(str1.substring(3,5),10);
var yr1 = parseInt(str1.substring(6,10),10);
var dt2 = parseInt(str2.substring(0,2),10);
var mon2 = parseInt(str2.substring(3,5),10);
var yr2 = parseInt(str2.substring(6,10),10);
var date1 = new Date(yr1, mon1, dt1);
var date2 = new Date(yr2, mon2, dt2);
if(date2 < date1)
{
alert("To date cannot be greater than from date");
return false;
}
else
{
alert("Submitting ...");
document.form1.submit();
}
}
回答by JamesN
First use this function will convert string to Date type in js:
首先使用此函数将字符串转换为 js 中的日期类型：
function common_getDateFromUI(str) {
var arr = str.split("/");
var returnDate = new Date(arr[2], arr[1] - 1, arr[0], 0, 0, 0, 0);
return returnDate;
}
Second: after you get the javascript date type, you just compare it as normal type like date1 > date2 or date1 == date2.
Or use this function to get the difference date between date:
第二：在您获得 javascript 日期类型后，您只需将其与普通类型进行比较，例如 date1 > date2 或 date1 == date2。
或使用此函数获取日期之间的差异日期：
function CalendarDays(startDate, endDate) {
if (endDate < startDate)
return 0;
// Calculate days between dates
var millisecondsPerDay = 86400 * 1000; // Day in milliseconds
startDate.setHours(0, 0, 0, 1); // Start just after midnight
endDate.setHours(23, 59, 59, 999); // End just before midnight
var diff = endDate - startDate; // Milliseconds between datetime objects
var days = Math.round(diff / millisecondsPerDay);
return days;
}
Follow this link is a simple demo to get difference days between dates. Link demo here
按照此链接是一个简单的演示，用于获取日期之间的差异天数。链接演示在这里
回答by lak
if (iForm.DiddfromDate.value == "")
{
alert(" Please enter a value");
iForm.DiddfromDate.focus();
return false;
}
if (iForm.DiddtoDate.value == "")
{
alert(" Please enter a value");
iForm.DiddtoDate.focus();
return false;
}
try {
var d1 = iForm.DiddfromDate.value.substr(0, 2);
var m1 = iForm.DiddfromDate.value.substr(3, 2);
var y1 = iForm.DiddfromDate.value.substr(6, 4);
var StrDate = m1 + "/" + d1 + "/" + y1;
var d2 = iForm.DiddtoDate.value.substr(0, 2);
var m2 = iForm.DiddtoDate.value.substr(3, 2);
var y2 = iForm.DiddtoDate.value.substr(6, 4);
var EndDate = m2 + "/" + d2 + "/" + y2;
var startDate = new Date(StrDate);
var endDate = new Date(EndDate);
if (startDate > endDate) {
alert('To date should be greater than From date.');
iForm.DiddfromDate.value = '';
iForm.DiddtoDate.value = '';
iForm.DiddfromDate.focus();
return false;
}
} catch (e) { alert(e.Description); }
return true;
回答by murli2308
Just convert the string to date and use getTimemethod of Date object to compare it.
只需将字符串转换为日期并使用getTimeDate 对象的方法进行比较。
Example code
示例代码
var startDate = '04/04/2015'; //date in dd/mm/yyyy format
var endDate = '05/04/2015';
function compareDates(sDate, eDate) {
var dateTime1 = new Date(sDate).getTime(),
dateTime2 = new Date(eDate).getTime();
var diff = dateTime2 - dateTime1;
if (diff > 0) {
alert("endDate is greater than startDate");
return true;
}
}
compareDates(startDate, endDate);
