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" %> <%@ page contentType="text/html" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <% //java注释 Date d = new Date(); int hour = d.getHours(); //获取小时 int minute = d.getMinutes();//获取分钟 int second = d.getSeconds();//获取秒 if (hour >= 0 && hour <= 12) { out.print("当前时间是" + hour + ":" + minute + ":" + second + ":" + "上午好"); } else if (hour > 12 && hour <= 17) { out.print("当前时间是" + hour + ":" + minute + ":" + second + ":" + "中午好"); } else if (hour > 17 && hour <= 23) { out.print("当前时间是" + hour + ":" + minute + ":" + second + ":" + "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" %> <%@ page contentType="text/html" %> <%!public String year(int y) { String a = null; if (y % 4 == 0 && y % 100 != 0 || y % 400 == 0) { a = "是闰年"; } else { a = "不是闰年"; } return a; }%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <% out.print("2023年"+year(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="utf-8" %> <%@ page contentType="text/html" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <%--jsp注释 --%> <% for (int i = 100; i <= 500;) { i = i + 100; %> <hr width="<%=i%>px"> <% } %> </body> </html>