1.显示当前时间，并输出上午(0-12)好,下午好(13-17),晚上好(18-23)
<%@ page language="java" import="java.util.*" pageEncoding="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>
<title>显示时间</title>
</head>
<body>
<%
//java注释
Date d=new Date();
int hour=d.getHours();//获取小时
int minute=d.getMinutes();
int second=d.getSeconds();
if(hour>=0&&hour<=12){
out.print("当前时间为"+hour+":"+minute+":"+second+"上午好");
}else if(hour>12&&hour<=17){
out.print("当前时间为"+hour+":"+minute+":"+second+"下午好");
}else{
out.print("当前时间为"+hour+":"+minute+":"+second+"晚上好");
}
%>
</body>
</html>
2. 使用声明方法,在页面调用该方法,判断2023是不是闰年
闰年：能被4整除但不能被100整除或者能被400整除
<%@ page language="java" import="java.util.*" pageEncoding="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>
<title>判断是否为闰年</title>
</head>
<body>
<%!
public String getYear(int year){
String z=null;
if(year%4==0&&year%100!=0||year%400==0){
z="是闰年";
}else{
z="不是闰年";
}
return z;
}%>
<!-- html注释 -->
<%
out.print("2023年"+getYear(2023));
%>
</body>
</html>
3.表达式+程序段 循环输出5条<hr>,长度分别为100px-500px
<%@ page language="java" import="java.util.*" pageEncoding="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>
<title>长度</title>
</head>
<body>
<%--jsp注释 --%><%
for(int i=1;i<=5;i++){%>
<hr width="<%=i*100%>px">
<%} %>
</body>
</html>
