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>
<title>显示时间</title>
</head>
<body>
<%
//获取系统时间 这是一个java注释
Calendar c=Calendar.getInstance();
int year=c.get(Calendar.YEAR);
int month=c.get(Calendar.MONTH)+1;
int date=c.get(Calendar.DATE);//这三行可以不要
int hour=c.get(Calendar.HOUR_OF_DAY);
int minute=c.get(Calendar.MINUTE);
int second=c.get(Calendar.SECOND);
%>
<table border="1" align="center">
<tr align="center"><td>现在的时间为：<%=hour %>时<%=minute %>分<%=second %>秒</td></tr>
<%
String str="";
//判断早中晚
if(hour>0 && hour<=12){
str="早上好";
}
else if(hour>12 && hour<=17){
str="下午好";
}
else if(hour>17 && hour<=24){
str="晚上好";
}
%>
<tr align="center"><td><%=str %></td></tr>
</table>
</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 language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%-- 声明方法是 "<%!" 开头 JSP注释 --%>
<%!
public boolean leap(int year){
boolean leap = false;
if((year %4 ==0 && year %100 !=0)||year %400==0)
leap = true;
return leap;
}
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'leap2023.jsp' starting page</title>
</head>
<body>
<!-- 这是HTML注释 -->
<%
if(leap(2023))
out.print("2023年是闰年！");
else
out.print("2023年不是闰年！");
%>
</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>输出hr</title>
</head>
<body>
<%--这是jsp注释 --%>
<%for(int i=1;i<=5;i++){ %>
<hr width="<%=i*100%>">
<% } %>
</body>
</html>
