<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width,initial-scale=1.0">
<link rel="icon" href="<%= BASE_URL %>favicon.ico">
<title>helloworld</title>
</head>
<body>
<script>
/**
* 计算N年后,YYYYMMDD
* startdate：为开始时间，格式YYYYMMDD
* nextYear：为间隔年月，如1表示一年后，2表示两年后
*/
function getAfterNYear(startdate,nextYear){
var expriedYear = parseInt(startdate.substring(0,4)) + nextYear;
var expriedMonth = startdate.substring(5,7);
var expriedDay = startdate.substring(8);
//考虑二月份场景，若N年后的二月份日期大于该年的二月份的最后一天，则取该年二月份最后一天
if(expriedMonth == '02' || expriedMonth == 2){
var monthEndDate = new Date(expriedYear ,expriedMonth,0).getDate();
if(parseInt(expriedDay) > monthEndDate){//为月底时间
//取两年后的二月份最后一天
expriedDay = monthEndDate;
}
}
return expriedYear+'-'+expriedMonth+'-'+expriedDay;
}
$cur = getAfterNYear('2019-02-28',5);
alert($cur)
</script>
</body>
</html>
