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)
<%@page import="java.text.SimpleDateFormat"%> <%@ 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> <p style="font-family:黑体;font-size:24"> <br>显示当前时间<br> </p> <p> <% Date d = new Date();//获取系统时间 SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置时间格式 out.print(sdf.format(d)+"</br>");//输出系统时间 int h = d.getHours();//得到系统小时数 if(h>=0&&h<=12){//判断时间范围并输出相应的问候语 out.print("上午好"); }else if(h>=13&&h<=17){ out.print("下午好"); }else{ out.print("晚上好"); } %> </p> </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="java.text.SimpleDateFormat"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<!-- 判断是否是闰年 -->
<%!
boolean isRun(int year){
if(year % 4 == 0 && year % 100 != 0 || year % 400 ==0){
return true;
}else{
return false;
}
}
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
2023
<!-- 调用isRun()方法判断 -->
<%
if(isRun(2023)){
out.print("是闰年");
}else{
out.print("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 import="java.text.SimpleDateFormat"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%-- 设置一个全局变量 --%> <%! int i = 0; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <%-- 循环五次 --%> <% for(i = 100; i <= 500; i += 100){ %> <%-- 设置每次线宽值为i --%> <hr width="<%=i%>px"/> <%} %> </body> </html>
