闰年条件：
- 能被4整除但不能被100整除
- 能被400整除
<%@ page language="java" import="java.util.*" contentType="text/html;charset=utf-8" %> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>判断闰年</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> <%! int getNumForYear(int byear,int eyear){ int num=0;//闰年数量 for(int i=byear;i<=eyear;i++){ //能被4整除但不能被100整除；能被400整除 if((i%4==0&&i%100!=0)||i%400==0){ num++; } } return num; } %> </head> <body> <%=getNumForYear(2000,2018) %> </body> </html>