jsp2 

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) 
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
 2 
 3 
 4 <!DOCTYPE HTML>
 5 <html>
 6 <head>
 7 <title>My JSP 'index.jsp' starting page</title>
 8 <meta charset = "utf-8">
 9 </head>
10 
11 <body>
12     <br>
13      <%
14         Date date = new Date();/* 获取方法 */
15         int hour = date.getHours();
16         int minute = date.getMinutes();
17         int second = date.getSeconds();
18         out.print("当前时间：" + hour + ":" + minute + ":" + second + "<br>");//获取时间
19         if (hour >= 0 && hour <= 12) {
20             out.print("早上好");
21         } else if (hour >= 13 && hour <= 17) {
22             out.print("中午好");
23         } else if (hour >= 18 && hour <= 23) {
24             out.print("晚上好");
25         }
26     %>
27 </body>
28 </html>

2. 使用声明方法,在页面调用该方法,判断2023是不是闰年

  
 1  <%!String y(int year) {
 2         if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
 3             return "该年是闰年";
 4         } else {
 5             return "该年不是闰年";
 6         }
 7     }%>
 8     <%
 9         String year = y(2023);
10         out.print(year);
11     %>

 

3.表达式+程序段 循环输出5条hr,长度分别为100px-500px

 1  <%-- 循环输出--%>
 2     <%
 3         int i = 100;
 4     %>
 5 
 6     <%
 7         for (i = 100; i <= 500; i = i + 100) {
 8     %>
 9     <hr width="<%=i%>px">
10     <%
11         }
12     %>

 

posted @ 2022-03-20 17:46  计算机1905geng  阅读(12)  评论(0)  编辑  收藏  举报