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lab_date.html
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<!DOCTYPE html>
<html lang="zh-cn">
<head>
<title>日期生成器 - Tools for SQL</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
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<link rel="stylesheet" href="css/jquery.fancybox.min.css">
<link rel="stylesheet" href="css/bootstrap-datepicker.css">
<link rel="stylesheet" href="fonts/flaticon/font/flaticon.css">
<link rel="stylesheet" href="css/aos.css">
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</head>
<body data-spy="scroll" data-target=".site-navbar-target" data-offset="300">
<div class="site-wrap" id="home-section">
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<div class="col-6 col-md-6 d-inline-block d-lg-none ml-md-0" ><a href="#" class="site-menu-toggle js-menu-toggle text-black float-right"><span class="icon-menu h3"></span></a></div>
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<div class="col-md-12 order-md-1">
<form class="needs-validation" novalidate="">
<div class="row" style="margin-top: 45px;">
<div class="col-md-2 mb-2">
<p>日期生成器</p>
</div>
<div class="col-md-4 mb-2">
<label for="inputName">选择日期</label>
<input type="text" class="form-control rounded-0" data-date-format="yyyy-mm-dd" id="datepicker">
<!-- <input type="text" class="form-control" id="inputName" placeholder="" value=""> -->
</div>
<div class="col-md-4 mb-2">
<label for="daysLast">输入时间跨度(天)</label><i style="padding-left:10px;" class="fa fa-question-circle" aria-hidden="true" data-toggle="tooltip" title="输入为正数，则向前近n天;如输入为负数n，按输入日期向后近-n天" ></i>
<input type="text" class="form-control rounded-0" id="daysLast" placeholder="默认为向前近30天" value="">
</div>
<div class="col-md-2 mb-2">
<label for="outputName"></label>
<button class="btn btn-primary btn-md btn-block" style="margin:7px 0px 0px 0px" id="button1" type="submit" onclick="generateDate();return false;">生成日期</button>
</div>
</div>
<hr class="mb-3">
<br>
</form>
</div>
<div class="col-md-12 order-md-2 mb-4">
<textarea class="form-control rounded-0" id="textarea" rows="18" placeholder="不同小工具将呈现不同的结果！"></textarea>
</div>
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<p class="mb-0">
<p class="mb-1">© 2018-2019 Clark Yu · <span><a href="update_log.html" data-toggle="tooltip" title="又有新的更新啦！" target="_blank" style='text-decoration:none;'>更新日志</a></span> · <span><a href="https://zhuanlan.zhihu.com/p/44502560" data-toggle="tooltip" title="提个意见！" target="_blank" style='text-decoration:none;'>给我留言</a></span> · <span id="busuanzi_container_site_pv">
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</div> <!-- .site-wrap -->
<script src="js/jquery-3.3.1.min.js"></script>
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<script src="js/popper.min.js"></script>
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<script src="js/main.js"></script>
<script>
// 配置日历
$('#datepicker').datepicker({
weekStart: 1,
daysOfWeekHighlighted: "6,0",
autoclose: true,
todayHighlight: true,
language:"zh-CN"
});
var dateTime=new Date();
dateTime=dateTime.setDate(dateTime.getDate()-1);
dateTime=new Date(dateTime);
$('#datepicker').datepicker("setDate", dateTime);
function dateAddDays(dataStr,dayCount) {
var strdate=dataStr; //日期字符串
var isdate = new Date(strdate.replace(/-/g,"/")); //把日期字符串转换成日期格式
isdate = new Date((isdate/1000+(86400*dayCount))*1000); //日期加1天
month = (isdate.getMonth()+1);
if(month<10){
month = "0" + month
};
day_s = (isdate.getDate());
if(day_s<10){
day_s = "0" + day_s
};
var pdate = isdate.getFullYear()+"-"+month+"-"+day_s; //把日期格式转换成字符串
return pdate;
}
//生成日期
function generateDate() {
var daysLast = document.getElementById("daysLast").value;
var dateName = document.getElementById("datepicker").value;
if(daysLast.length < 1){
daysLast = 30;
}
var r = /^\-?[0-9][0-9]*$/;
flag = r.test(daysLast);
if (flag == true){
daysLast = parseInt(daysLast)
// console.log(daysLast);
var tObj = document.getElementById('textarea');
if(daysLast > 1&&daysLast<100000){
console.log(dateName);
var new_date = dateAddDays(dateName,-(daysLast-1));
tObj.value = "between '" + new_date + "' and " + "'" + dateName + "'";
}else if(daysLast <-1&&daysLast>-100000){
var new_date = dateAddDays(dateName,-(daysLast+1));
tObj.value = "between '" + dateName + "' and " + "'" + new_date + "'";
}else{
var tObj = document.getElementById('textarea');
tObj.value = '请输入正确的时间区间！';
}
}else {
var tObj = document.getElementById('textarea');
tObj.value = '请输入正确的时间区间！';
}
}
$(function () {
$('[data-toggle="tooltip"]').tooltip()
})
</script>
</body>
</html>