jsp第二周作业
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)
1 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 5 %> 6 <%! 7 //Java注释内容 8 public String tdate(){ 9 Calendar c=Calendar.getInstance(); 10 int hour=c.get(Calendar.HOUR); 11 String t = null; 12 if(hour>=0&&hour<=12){ 13 t = "上午好"; 14 }else if(hour>=13&&hour<=17){ 15 t = "下午好"; 16 }else if(hour>=18&&hour<=23){ 17 t = "晚上好"; 18 } 19 return t; 20 } 21 22 %> 23 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 24 <html> 25 <head> 26 <base href="<%=basePath%>"> 27 28 <title>My JSP 'index.jsp' starting page</title> 29 <meta http-equiv="pragma" content="no-cache"> 30 <meta http-equiv="cache-control" content="no-cache"> 31 <meta http-equiv="expires" content="0"> 32 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 33 <meta http-equiv="description" content="This is my page"> 34 <!-- 35 <link rel="stylesheet" type="text/css" href="styles.css"> 36 --> 37 </head> 38 39 <body> 40 欢迎你<br> 41 <% 42 out.print(tdate()); 43 %> 44 </body> 45 </html>
2. 使用声明方法,在页面调用该方法,判断2023是不是闰年
闰年：能被4整除但不能被100整除或者能被400整除
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <%! public String tdate(int year){ String t = null; if(year%4==0&&year%100!=0||year%400==0){ t = "今年是闰年"; }else{ t = "今年不是闰年"; } return t; } %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <!-- HTML注释内容 --> 欢迎你<br> <% out.print("2022年"+tdate(2022)); %> </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"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>My JSP 'index.jsp' starting page</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body> <% for(int i=1;i<=5;i++){ %><hr width="<%=i*100%>px" color="red"> <% } %> </body> </html>
