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）

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

2.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

 

 

<%@ 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>

 

posted @ 2022-03-20 19:18  赵云鹏  阅读(17)  评论(0)  编辑  收藏  举报