jsp第二次作业
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>
</head>
<body>
<%
Calendar c = Calendar.getInstance();
int hour = c.get(Calendar.HOUR); //将获去的数值赋值给HOUR
int minute = c.get(Calendar.MINUTE);
int second = c.get(Calendar.SECOND);
out.print("时间为"+hour+":"+minute+":"+second+"<br>");
if(hour>=0 && hour<=12){
out.print("上午好");
}else if(hour>=13 && hour<=17){
out.print("下午好");}else if(hour>=18 && hour<=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
<%@page import="com.sun.xml.internal.txw2.Document"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%!
boolean isRun(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=isRun(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>
</head>
<body>
<%--循环输出100-500px的hr --%>
<%for(int i=1;i<6;i++) {
%>
<hr width="<%=i*100%>px">
<% out.print("<dr>");%>
<%} %>
</body>
</html>
4.在第一题上加Java注释,第二题加html注释,第三题加jsp注释
