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)
<%@ 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> <% //java注释 Calendar c = Calendar.getInstance(); int hour = c.get(Calendar.HOUR);//获取小时 int minute = c.get(Calendar.MINUTE);//获取分钟 int second = c.get(Calendar.SECOND);//获取秒 System.out.println("当前时间:" + hour + ":" + minute + ":" + second);//控制台输出 if (hour >= 0 && hour <= 12) { System.out.println("早上好"); } else if (hour >= 13 && hour <= 17) { System.out.println("下午好"); } else if (hour >= 18 && hour <= 23) { System.out.println("晚上好"); } Date d = new Date(); int h = d.getHours(); //获取小时 int m = d.getMinutes();//获取分钟 int s = d.getSeconds();//获取秒 out.print("当前时间:" + h + ":" + m + ":" + s + "<br>");//网页输出 if (h >= 0 && h <= 12) { out.print("早上好!"); } else if (h >= 13 && h <= 17) { out.print("下午好!"); } else if (h >= 18 && h <= 23) { out.print("晚上好!"); } %> </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
闰年:能被4整除但不能被100整除或者能被400整
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %> <%!boolean isRun(int year) { if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) { return true; } return false; }%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <!-- HTML注释 --> <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> <% boolean a = isRun(2023); out.print(a); %> </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注释 --> <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> <%--jsp注释 --%> <body> <% for (int i = 1; i <= 5; i++) { %> <hr width="<%=i * 100%>px"> <% } %> </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