第二周
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title></title>
</head>
<body>
<%
Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH) + 1;
int date = c.get(Calendar.DATE);
int hour = c.get(Calendar.HOUR_OF_DAY);
int minute = c.get(Calendar.MINUTE);
int second = c.get(Calendar.SECOND);
String x = "";
if (hour >= 0 && hour <= 12) {
x = "上午好!";
} else if (hour >= 13 && hour <= 17) {
x = "下午好!";
} else if (hour >= 18 && hour <= 23) {
x = "晚上好!";
}
%>
<p>
当前时间为:<%=year%>/<%=month%>/<%=date%>
<%=hour%>:<%=minute%>:<%=second%><br>
</p>
<p><%=x%></p> <br>
</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"%>
<%!int i = 0;
int j = 0;%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<%!
boolean isRun(int year){
if(year%4==0&&year%100!=0||year%400==0){
return true;
}
return false;
} %>
<html>
<head>
<!-- HTML注释 -->
<title>My JSP 'index.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 import="java.util.Date" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<body>
<h2>
</h2>
</body>
<%--jsp注释--%>
<%
for (int i = 100; i <= 500; i = i+100) {
%>
<hr width="<%=i%>" color="red">
<%
}
%>
</html>