JSP第一次作业
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> <title>显示时间</title> </head> <body> <% //获取系统时间 这是一个java注释 Calendar c=Calendar.getInstance(); int year=c.get(Calendar.YEAR); int month=c.get(Calendar.MONTH)+1; int date=c.get(Calendar.DATE);//这三行可以不要 int hour=c.get(Calendar.HOUR_OF_DAY); int minute=c.get(Calendar.MINUTE); int second=c.get(Calendar.SECOND); %> <table border="1" align="center"> <tr align="center"><td>现在的时间为:<%=hour %>时<%=minute %>分<%=second %>秒</td></tr> <% String str=""; //判断早中晚 if(hour>0 && hour<=12){ str="早上好"; } else if(hour>12 && hour<=17){ str="下午好"; } else if(hour>17 && hour<=24){ str="晚上好"; } %> <tr align="center"><td><%=str %></td></tr> </table> </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"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <%-- 声明方法是 "<%!" 开头 JSP注释 --%> <%! public boolean leap(int year){ boolean leap = false; if((year %4 ==0 && year %100 !=0)||year %400==0) leap = true; return leap; } %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'leap2023.jsp' starting page</title> </head> <body> <!-- 这是HTML注释 --> <% if(leap(2023)) out.print("2023年是闰年!"); else out.print("2023年不是闰年!"); %> </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> <title>输出hr</title> </head> <body> <%--这是jsp注释 --%> <%for(int i=1;i<=5;i++){ %> <hr width="<%=i*100%>"> <% } %> </body> </html>