jsp 第二周作业
1. p39 实验2 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"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<%
//java注释
Date d=new Date();
int h=d.getHours(); //获取小时
int m=d.getMinutes();//获取分钟
int s=d.getSeconds();//获取秒
out.print("当前时间："+h+":"+m+":"+s+"<br>");
if(h>=0&&h<=12){
out.print("早上好");
}else if(h>=13&&h<=17){
out.print("下午好");
}else if(h>=18&&h<=23){
out.print("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"%>
<%!
boolean sf(int year){
if(year%4==0&&year%100!=0||year%400==0){
return true;
}
return false;
}
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<!-- HTML注释 -->
<title>My JSP 'index1.jsp' starting page</title>
</head>
<body>
<%
boolean f=sf(2023);
out.print(f);
%>
</body>
</html>
3.表达式+程序段 循环输出5条<hr>,长度分别为100px-500px
<hr width="<%=i%>"
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index1.jsp' starting page</title>
</head>
<body>
<%--jsp注释 --%>
<%
for (int i = 1; i <= 5; i++) {
%>
<hr width="<%=i * 100%>px">
<%
}
%>
</body>
</html>
