jsp实现日期控件代码
时间: 2023-08-24 07:10:05 浏览: 52
在 JSP 中实现日期控件,可以使用第三方框架或者自己编写 JavaScript 实现。以下是一个简单的示例代码:
1. 借助第三方框架
使用第三方框架可以简化日期控件的实现过程,常见的框架有 jQuery UI、Bootstrap Datepicker 等。以 jQuery UI 为例:
首先,在 jsp 页面中引入 jQuery 库和 jQuery UI 库:
```
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script>
<link rel="stylesheet" href="https://code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
```
然后,在需要使用日期控件的 input 标签中添加以下代码:
```
<input type="text" id="datepicker">
```
最后,在 JavaScript 中实现日期控件:
```
$( function() {
$( "#datepicker" ).datepicker();
} );
```
2. 自己编写 JavaScript 实现
如果不想使用第三方框架,也可以自己编写 JavaScript 实现。以下是一个简单的示例代码:
在 jsp 页面中添加以下代码:
```
<input type="text" id="datepicker">
```
在 JavaScript 中实现日期控件:
```
var datepicker = document.getElementById("datepicker");
datepicker.addEventListener("focus", function() {
var datePickerDiv = document.createElement("div");
datePickerDiv.setAttribute("id", "datePickerDiv");
var currentDate = new Date();
var currentYear = currentDate.getFullYear();
var currentMonth = currentDate.getMonth() + 1;
var currentDay = currentDate.getDate();
var yearSelect = "<select id='yearSelect'>";
for (var i = currentYear - 10; i <= currentYear + 10; i++) {
yearSelect += "<option value='" + i + "'>" + i + "</option>";
}
yearSelect += "</select>";
var monthSelect = "<select id='monthSelect'>";
for (var i = 1; i <= 12; i++) {
var monthText = i < 10 ? "0" + i : i;
monthSelect += "<option value='" + i + "'>" + monthText + "</option>";
}
monthSelect += "</select>";
var daySelect = "<select id='daySelect'>";
for (var i = 1; i <= 31; i++) {
var dayText = i < 10 ? "0" + i : i;
daySelect += "<option value='" + i + "'>" + dayText + "</option>";
}
daySelect += "</select>";
datePickerDiv.innerHTML = yearSelect + monthSelect + daySelect;
datePickerDiv.style.position = "absolute";
datePickerDiv.style.left = datepicker.offsetLeft + "px";
datePickerDiv.style.top = datepicker.offsetTop + datepicker.offsetHeight + "px";
datePickerDiv.style.backgroundColor = "#fff";
datePickerDiv.style.border = "1px solid #ccc";
datePickerDiv.style.padding = "5px";
document.body.appendChild(datePickerDiv);
var yearSelect = document.getElementById("yearSelect");
var monthSelect = document.getElementById("monthSelect");
var daySelect = document.getElementById("daySelect");
yearSelect.value = currentYear;
monthSelect.value = currentMonth;
daySelect.value = currentDay;
yearSelect.addEventListener("change", function() {
setDays();
});
monthSelect.addEventListener("change", function() {
setDays();
});
function setDays() {
var year = yearSelect.value;
var month = monthSelect.value;
var day = daySelect.value;
var daysInMonth = new Date(year, month, 0).getDate();
daySelect.innerHTML = "";
for (var i = 1; i <= daysInMonth; i++) {
var dayText = i < 10 ? "0" + i : i;
daySelect.innerHTML += "<option value='" + i + "'>" + dayText + "</option>";
}
if (day > daysInMonth) {
daySelect.value = daysInMonth;
} else {
daySelect.value = day;
}
}
function hideDatePicker() {
datePickerDiv.parentNode.removeChild(datePickerDiv);
}
yearSelect.focus();
yearSelect.select();
yearSelect.addEventListener("blur", function() {
hideDatePicker();
});
monthSelect.addEventListener("blur", function() {
hideDatePicker();
});
daySelect.addEventListener("blur", function() {
hideDatePicker();
});
});
```
以上代码实现了一个简单的日期控件,包含年、月、日三个下拉框,用户选择日期后会自动填充到 input 标签中。