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); int minute = c.get(Calendar.MINUTE); int second = c.get(Calendar.SECOND); %><!-- 获取电脑时间 --> <h1> 用户在<%=hour%>:<%=minute%>:<%=second %>访问了网页 </h1> <% //判断 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"); } %> </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>
<head>
</head>
<body>
<%!String sal(int x, String m, String n) {
if (x % 4 == 0 && x % 100 != 0 || x % 400 == 0) {
return m;
}
return n;
}%><!-- 定义声明方法 -->
<%
String y = sal(2023, "闰年", "平年");
out.print(y);
%>
</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>
<%
for(int x=100;x<600;x+=100){ //判断
%>
<hr width="<%=x%>" px color=red>
<%
}
%>
</body>
</html>
