jsp第二次作业

1.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>
  </head>
  
  <body>
  <%
    Date d = new Date();
    out.println(d.getHours());             //显示当前时间
    if(d.getHours()>=0 && d.getHours()<=12)//判断时间
    out.print("下午好");
    else if(d.getHours()>=13&&d.getHours()<=17)
    out.print("中午好");
    else
    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"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%! boolean b(int x){
return x%4==0||x%100!=0&&x%400==0;
}
 %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>
  <body>
  判断2023是不是闰年：<%=b(2023) %><!-- 调用并输出结果 -->
  </body>
</html>

3.表达式+程序段 循环输出5条hr,长度分别为100px-500px

<%@ 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>
  </head>
  <body>
    <%
    for(int x=1;x<=5;x++){    
     %>                              <%--循环5次输出直线 --%>
     <hr width="<%=x*100%>px">
     <br>
     <%} %>
     
  </body>
</html>

 

posted @ 2022-03-13 21:45  张云龙1  阅读(21)  评论(0)  编辑  收藏  举报