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>
<%! public void judeYear (int year){if(year%400==0||year%4==0&year%100!=0){
System.out.printf("润");
}else{
System.out.printf("bu润");}
}%>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<%
Date d = new Date();
int x=d.getHours();
int y=d.getMinutes();
int z=d.getSeconds();
out.print("当前时间："+x+":"+y+":"+z+"<br>");
if (x >= 0 && x <= 12) {
out.print("上午好！");
} else if (x >= 13 && x <= 17) {
out.print("中午好！");
} else if (x >= 18 && x <= 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 language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<%! public void judeYear (int year){if(year%400==0||year%4==0&year%100!=0){
System.out.printf("润");
}else{
System.out.printf("bu润");}
}%>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<br>
<%judeYear((2023)); %>
</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="ISO-8859-1"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<br>
<% for(int i=1;i<=5;i++) {%>
<hr width="<%=i*100 %>">
<%} %>
</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
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<%! public void judeYear (int year){if(year%400==0||year%4==0&year%100!=0){
System.out.printf("润");
}else{
System.out.printf("bu润");}
}
/* 程序员专属 */%>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<--! 用户可见 -->
<%
Date d = new Date();
int x=d.getHours();
int y=d.getMinutes();
int z=d.getSeconds();
out.print("当前时间："+x+":"+y+":"+z+"<br>");
if (x >= 0 && x <= 12) {
out.print("上午好！");
} else if (x >= 13 && x <= 17) {
out.print("中午好！");
} else if (x >= 18 && x <= 23) {
out.print("晚上好！");
}
%>
</body>
</html>
