我有一个页面显示开始日期和结束日期,如下所示:
您可以看到,默认情况下,结束日期总是比开始日期多7天。我可以更改开始日期,但是如何确保每次更改开始日期时,结束日期也分别相距7天?
代码:
<%
String relPath = "../../../";
String currentDate = CoreUtil.parseDate(new Date());
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
//get current date
Calendar cal = Calendar.getInstance();
//Number of Days to add
cal.add(Calendar.DAY_OF_MONTH, 7);
String defaultDate = sdf.format(cal.getTime());
%>
Start Date: <input class="txtStartDate" style="font: 13px/1.231 Trebuchet MS;" type="text" id="txtStartDate" name="Start Date" value="<%=currentDate%>" readonly><br><br>
End Date:   <input class="txtEndDate" style="font: 13px/1.231 Trebuchet MS;" type="text" id="txtEndDate" name="txtEndDate" value="<%=defaultDate%>" readonly required/>
编辑:
这是我的JavaScript代码:
<Script>
$('#txtStartDate').datepicker();
$('#txtEndDate').datepicker();
$('#txtStartDate').change(function(){
var interval = 7;
function convertDateString(p) { return (p < 10) ? '0' + p : p; }
var startDate = new Date($(this).val());
startDate.setDate(startDate.getDate() + interval);
$('#txtEndDate').val( startDate.getFullYear() + '/' + convertDateString(startDate.getMonth() + 1) + '/' + convertDateString(startDate.getDate()));
});
</script>
基本上,每当我更改开始日期时,结束日期也应自动更改为(开始日期+ 7天),这就是我要做的。上面的代码应该可以使用,但是当我更改开始日期时,它并没有更改我的结束日期。
答案 0 :(得分:2)
这可能有帮助。
Date.prototype.addDays = function(days) {
var date = new Date(this.valueOf());
date.setDate(date.getDate() + days);
return date;
}
$('#txtStartDate').datepicker();
$('#txtEndDate').datepicker();
$('#txtStartDate').change(function(){
var interval = 7;
var startDate = new Date($(this).val());
$('#txtEndDate').val(startDate.addDays(interval));
});
答案 1 :(得分:2)
您可以使用JavaScript Date对象进行计算,并使用Strings进行格式化:
{
name:{
type:string
},
tax:{
type:string,
}
.......
type_of_room:[{
category:{
type:String,
enum: ['SINGLEA','SINGLEB','SINGLEC','DOUBLEA','DOUBLEB','DOUBLEC','TRIPLEA','TRIPLEB','TRIPLEC','QUADA','QUADB','QUADC'],
required: true
},
title:{
type:String
}
price:{
type:Number,
required:true
}
}]
}
// Get references to HTML elements
const startInput = document.getElementById("txtStartDate");
const endInput = document.getElementById("txtEndDate");
// Listen for changes to #txtStartDate
startInput.addEventListener("change", updateEndDate);
// Respond to changes
function updateEndDate(event){
// Calculate end date
let endDate = new Date(startInput.value);
endDate.setUTCDate(endDate.getUTCDate() + 7);
// Separate the parts of end date
let yyyy = endDate.getUTCFullYear(),
mm = endDate.getUTCMonth() + 1,
dd = endDate.getUTCDate();
// Add initial zeros if needed
if(mm < 10){mm = "0" + mm; }
if(dd < 10){dd = "0" + dd; }
// Format and display end date
endInput.value = `${yyyy}-${mm}-${dd}`;
}