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); //将获去的数值赋值给HOUR int minute = c.get(Calendar.MINUTE); int second = c.get(Calendar.SECOND); out.print("时间为"+hour+":"+minute+":"+second+"<br>"); 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"); } %> </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 import="com.sun.xml.internal.txw2.Document"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%! boolean isRun(int year){ if(year%4==0&&year%100!=0||year%400==0){ return true; } return false; } %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <!-- HTML注释 --> <title>My JSP 'index1.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 language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> </head> <body> <%--循环输出100-500px的hr --%> <%for(int i=1;i<6;i++) { %> <hr width="<%=i*100%>px"> <% out.print("<dr>");%> <%} %> </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