第二周jsp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" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%@ page import="java.util.*"%> <%@page import="java.text.SimpleDateFormat"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>显示当前时间</title> </head> <body> <h1> 显示访问网页的日期、时间<br>(服务器端的日期、时间) </h1> <% Date date = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); int hour = date.getHours(); %> <h2> <% out.print(sdf.format(date) + "</br>"); if (hour > 0 && hour <= 12) { out.print("上午好"); } else if (hour > 12 && hour <= 18) { out.print("下午好"); } else { out.print("晚上好"); } %> </h2> </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" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>判断是否为闰年</title> </head> <body> <!-- 2. 使用声明方法,在页面调用该方法,判断2023是不是闰年 --> <%!boolean x(int year) { if (year % 4 == 0 && year % 100 != 100 || year % 400 == 0) { return true; } else { return false; } }%> <% if (x(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 language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>循环输出5条hr</title> </head> <body> <%--表达式+程序段 循环输出5条hr,长度分别为100px-500px --%> <% for (int i = 100; i <= 500; i+=100) { %> <hr width="<%=i%>"> <% } %> </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
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <%@ page import="java.util.*"%> <%@page import="java.text.SimpleDateFormat"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>显示当前时间</title> </head> <body> <h1> 显示访问网页的日期、时间<br>(服务器端的日期、时间) </h1> <% Date date = new Date(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); int hour = date.getHours(); %> <h2> <% /* out.print(sdf.format(date) + "</br>"); if (hour > 0 && hour <= 12) { out.print("上午好"); } else if (hour > 12 && hour <= 18) { out.print("下午好"); } else { out.print("晚上好"); } */ %> </h2> </body> </html>
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>判断是否为闰年</title> </head> <body> <!-- 2. 使用声明方法,在页面调用该方法,判断2023是不是闰年 --> <%!boolean x(int year) { if (year % 4 == 0 && year % 100 != 100 || year % 400 == 0) { return true; } else { return false; } }%> <% if (x(2023)) { out.print("是闰年"); } else { out.print("不是闰年"); } %> </body> </html>
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>循环输出5条hr</title> </head> <body> <%--表达式+程序段 循环输出5条hr,长度分别为100px-500px --%> <% for (int i = 100; i <= 500; i+=100) { %> <hr width="<%=i%>"> <% } %> </body> </html>
