如何返回正确的月份？
如何返回正确的月份？
提问于 2017-03-27 12:30:18
第一次约会应该是28/03/2017，但它将以28/02/2017的身份返回。
第一次约会后的几个月似乎是正确的。
有没有更好的方法来做这件事，或者有人能帮我弄清楚为什么第一次约会是这样的？
var date = new Date("Tue Mar 28 2017 13:14:00 GMT+0100 (BST)");
var additionalMonth = date.getMonth();
function addZero(i) {
if (i < 10) {
i = "0" + i;
}
return i;
}
function formatDateToString(d){
var month = '' + (d.getMonth() + 1);
var day = '' + d.getDate();
var year = d.getFullYear();
var hour = d.getHours();
var minute = d.getMinutes();
var second = d.getSeconds();
if (month.length < 2) month = '0' + month;
if (day.length < 2) day = '0' + day;
hour = addZero(hour);
minute = addZero(minute);
second = addZero(second);
var date = [day, month, year].join('/');
var time = [hour, minute, second].join(':');
var newDate = date + " " + time;
return newDate;
}
function setTimeForDate(date){
date.setHours(12);
date.setMinutes(0);
date.setSeconds(0);
return date;
}
function calculateDate(date, month){
date.setMonth(month);
date = setTimeForDate(date);
return date;
}
function calculateLastDayMonth(date, day){
var month = date.getMonth();
var year = date.getFullYear();
var d = new Date(year, month, 0).getDate();
if(day >= d){
date = new Date(year, month, 0);
}
date = setTimeForDate(date);
return date;
}
function returnFormattedDate(startDate, additionalMonth){
var day = startDate.getDate();
var newDate = calculateDate(startDate, additionalMonth);
var correctDate = calculateLastDayMonth(newDate, day);
return formatDateToString(correctDate);
}
$(".returnedDate").text("START DATE: " + returnFormattedDate(date, additionalMonth));
for(var x = 0; x <= 5; x++){
$("body").append(returnFormattedDate(date, additionalMonth) + "<br>");
additionalMonth++;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<h5 class="returnedDate"></h5>
回答 4
Stack Overflow用户
回答已采纳
发布于 2017-03-27 12:35:06
您必须更改var month = date.getMonth(); to var month = date.getMonth()+1;，因为索引从0开始。
var date = new Date("Tue Mar 28 2017 13:14:00 GMT+0100 (BST)");
var additionalMonth = date.getMonth();
function addZero(i) {
if (i < 10) {
i = "0" + i;
}
return i;
}
function formatDateToString(d){
var month = '' + (d.getMonth() + 1);
var day = '' + d.getDate();
var year = d.getFullYear();
var hour = d.getHours();
var minute = d.getMinutes();
var second = d.getSeconds();
if (month.length < 2) month = '0' + month;
if (day.length < 2) day = '0' + day;
hour = addZero(hour);
minute = addZero(minute);
second = addZero(second);
var date = [day, month, year].join('/');
var time = [hour, minute, second].join(':');
var newDate = date + " " + time;
return newDate;
}
function setTimeForDate(date){
date.setHours(12);
date.setMinutes(0);
date.setSeconds(0);
return date;
}
function calculateDate(date, month){
date.setMonth(month);
date = setTimeForDate(date);
return date;
}
function calculateLastDayMonth(date, day){
var month = date.getMonth()+1;
var year = date.getFullYear();
var d = new Date(year, month, 0).getDate();
if(day >= d){
date = new Date(year, month, 0);
}
date = setTimeForDate(date);
return date;
}
function returnFormattedDate(startDate, additionalMonth){
var day = startDate.getDate();
var newDate = calculateDate(startDate, additionalMonth);
var correctDate = calculateLastDayMonth(newDate, day);
return formatDateToString(correctDate);
}
$(".returnedDate").text("START DATE: " + returnFormattedDate(date, additionalMonth));
for(var x = 0; x <= 5; x++){
$("body").append(returnFormattedDate(date, additionalMonth) + "<br>");
additionalMonth++;
}<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<h5 class="returnedDate"></h5>
Stack Overflow用户
发布于 2017-03-27 12:36:19
您有两种不同的方法：
var additionalMonth = date.getMonth();和
var month = '' + (d.getMonth() + 1);JS返回从0计算的月份数，所以一月份是0，2月是1，所以如果您想要正确的数字，就需要添加1，就像对month一样。您也可以查看这个这里。
Stack Overflow用户
发布于 2017-03-27 12:41:26
var month = date.getMonth() + 1;您应该将1添加到月份，因为月份索引从0开始；
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/43046528
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