第二周作业

1.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="com.sun.xml.internal.txw2.Document"%>
<%@ 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>
   
    <%
    //java注释
    Date d=new Date();
    int hour=d.getHours(); //获取小时
    int minute=d.getMinutes();//获取分钟
    int second=d.getSeconds();//获取秒
    out.print("当前时间："+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");
    }
     %>
  </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="com.sun.xml.internal.txw2.Document"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%!
    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>
  <head> 
  <!-- HTML注释 -->
    <title>My JSP 'index1.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%>"

复制代码
<%@page import="com.sun.xml.internal.txw2.Document"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head> 
    <title>My JSP 'index2.jsp' starting page</title>
  </head>
  <body>
  <%--jsp注释 --%>
  <%
  for(int i=1;i<=5;i++){ %>
  <hr width="<%=i*100%>px" color="red">
  <% }%>
    
  </body>
</html>