JSP第二次上机作业
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"%> <html> <head> <title>one</title> </head> <body> <strong><% Calendar c=Calendar.getInstance(); int hour=c.get(Calendar.HOUR); int minute=c.get(Calendar.MINUTE); int second=c.get(Calendar.SECOND); out.print("当前时间为:"+hour+":"+minute+":"+second+"<br><br>"); if(hour>=0&&hour<=12){ out.print("早上好"); }else if(hour>=13&&hour<=17){ out.print("下午好"); }else if(hour>=18&&hour<=23){ out.print("晚上好"); } %></strong> </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整除
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title>My JSP 'time.jsp' starting page</title> </head> <body> <!-- html注释 --> <%! String div(int year,String m,String n){ //定义方法 if (year%4==0&&year%100!=0||year%400==0) { //判断是否为闰年 return m; } return n; } %> <% String y=div(2023,"闰年","平年"); //为year赋值 out.print(y); //输出结果 %> </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="ISO-8859-1"%> <html> <head> <title></title> </head> <body> <%--for循环(i由100到500)--%> <% for(int i=100;i<600;i+=100){ %> <hr width="<%=i%>" color=yellow> <% } %> </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