JAVA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)
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <% Date d=new Date(); int h=d.getHours(); int m=d.getMinutes(); int s=d.getSeconds(); out.print("当前时间:"+h+":"+m+":"+s+"<br>"); 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
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%! int i = 0; int j = 0;%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <%! boolean isRun(int year){ if(year%4==0&&year%100!=0||year%400==0){ return true; } return false; } %> <html> <head> <title> My JSP 'index.jsp' starting page </title> </head> <body> <% boolean f=isRun(2023); out.print(f); %> </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> <head> <title>My JSP 'index.jsp' starting page</title> </head> <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